./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1 --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 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 06:53:10,609 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 06:53:10,669 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 06:53:10,675 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 06:53:10,676 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 06:53:10,697 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 06:53:10,698 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 06:53:10,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 06:53:10,698 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 06:53:10,699 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 06:53:10,699 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 06:53:10,699 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 06:53:10,699 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 06:53:10,699 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 06:53:10,699 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 06:53:10,700 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 06:53:10,700 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 06:53:10,701 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 06:53:10,701 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:53:10,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:53:10,702 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 06:53:10,702 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 06:53:10,703 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 06:53:10,703 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 06:53:10,703 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 06:53:10,703 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 06:53:10,703 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_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1 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 -> 007fc8a389a67fb47c7d326d3f1d284696dfe5de13661e77d6d1bf7cce285194 [2024-12-02 06:53:10,909 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 06:53:10,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 06:53:10,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 06:53:10,920 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 06:53:10,920 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 06:53:10,921 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-12-02 06:53:13,539 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/data/339422638/5e620c3c3ea148fa8fa876f8a0d97991/FLAG307cea51e [2024-12-02 06:53:13,803 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 06:53:13,803 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/sv-benchmarks/c/array-memsafety/openbsd_cmemchr-alloca-2.i [2024-12-02 06:53:13,812 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/data/339422638/5e620c3c3ea148fa8fa876f8a0d97991/FLAG307cea51e [2024-12-02 06:53:14,135 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/data/339422638/5e620c3c3ea148fa8fa876f8a0d97991 [2024-12-02 06:53:14,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 06:53:14,138 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 06:53:14,139 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 06:53:14,139 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 06:53:14,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 06:53:14,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,143 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e40788d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14, skipping insertion in model container [2024-12-02 06:53:14,143 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,163 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 06:53:14,393 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 06:53:14,400 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 06:53:14,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 06:53:14,413 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 06:53:14,448 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 06:53:14,473 INFO L204 MainTranslator]: Completed translation [2024-12-02 06:53:14,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14 WrapperNode [2024-12-02 06:53:14,473 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 06:53:14,474 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 06:53:14,474 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 06:53:14,474 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 06:53:14,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,489 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,506 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 67 [2024-12-02 06:53:14,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 06:53:14,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 06:53:14,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 06:53:14,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 06:53:14,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,515 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,517 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,528 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2024-12-02 06:53:14,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,528 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,533 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,533 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,536 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,537 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,538 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 06:53:14,540 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 06:53:14,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 06:53:14,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 06:53:14,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (1/1) ... [2024-12-02 06:53:14,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 06:53:14,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:14,571 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 06:53:14,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 06:53:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 06:53:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 06:53:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 06:53:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 06:53:14,601 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 06:53:14,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 06:53:14,677 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 06:53:14,678 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 06:53:14,814 INFO L? ?]: Removed 36 outVars from TransFormulas that were not future-live. [2024-12-02 06:53:14,815 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 06:53:14,824 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 06:53:14,824 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 06:53:14,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:14 BoogieIcfgContainer [2024-12-02 06:53:14,824 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 06:53:14,827 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 06:53:14,827 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 06:53:14,831 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 06:53:14,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 06:53:14" (1/3) ... [2024-12-02 06:53:14,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72876c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:53:14, skipping insertion in model container [2024-12-02 06:53:14,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 06:53:14" (2/3) ... [2024-12-02 06:53:14,832 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72876c69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 06:53:14, skipping insertion in model container [2024-12-02 06:53:14,832 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:14" (3/3) ... [2024-12-02 06:53:14,833 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cmemchr-alloca-2.i [2024-12-02 06:53:14,845 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 06:53:14,847 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cmemchr-alloca-2.i that has 1 procedures, 26 locations, 1 initial locations, 2 loop locations, and 5 error locations. [2024-12-02 06:53:14,883 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 06:53:14,895 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;@1b1ade4e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 06:53:14,895 INFO L334 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-12-02 06:53:14,898 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:14,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 06:53:14,903 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:14,903 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:14,904 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:14,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash 121325233, now seen corresponding path program 1 times [2024-12-02 06:53:14,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:14,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573749294] [2024-12-02 06:53:14,915 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:14,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:15,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:15,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:15,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573749294] [2024-12-02 06:53:15,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573749294] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:15,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:15,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 06:53:15,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257603736] [2024-12-02 06:53:15,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:15,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 06:53:15,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:15,132 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 06:53:15,132 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 06:53:15,134 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.65) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:15,166 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2024-12-02 06:53:15,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 06:53:15,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 06:53:15,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:15,172 INFO L225 Difference]: With dead ends: 25 [2024-12-02 06:53:15,172 INFO L226 Difference]: Without dead ends: 23 [2024-12-02 06:53:15,174 INFO L434 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 [2024-12-02 06:53:15,176 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:15,177 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 42 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:15,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-12-02 06:53:15,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-12-02 06:53:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2024-12-02 06:53:15,200 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 8 [2024-12-02 06:53:15,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:15,200 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2024-12-02 06:53:15,201 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2024-12-02 06:53:15,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 06:53:15,201 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:15,201 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:15,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 06:53:15,202 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:15,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:15,202 INFO L85 PathProgramCache]: Analyzing trace with hash 121325234, now seen corresponding path program 1 times [2024-12-02 06:53:15,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:15,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416908886] [2024-12-02 06:53:15,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:15,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:15,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:15,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416908886] [2024-12-02 06:53:15,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416908886] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:15,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:15,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 06:53:15,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136192567] [2024-12-02 06:53:15,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:15,448 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:53:15,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:15,449 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:53:15,449 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:53:15,449 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:15,534 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2024-12-02 06:53:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:53:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 06:53:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:15,535 INFO L225 Difference]: With dead ends: 34 [2024-12-02 06:53:15,535 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 06:53:15,536 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:53:15,536 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:15,536 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 82 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:15,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 06:53:15,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-12-02 06:53:15,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.391304347826087) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2024-12-02 06:53:15,540 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 8 [2024-12-02 06:53:15,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:15,540 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2024-12-02 06:53:15,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,540 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2024-12-02 06:53:15,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 06:53:15,541 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:15,541 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:15,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 06:53:15,541 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:15,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:15,542 INFO L85 PathProgramCache]: Analyzing trace with hash 123172276, now seen corresponding path program 1 times [2024-12-02 06:53:15,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:15,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109827866] [2024-12-02 06:53:15,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:15,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:15,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:15,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:15,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:15,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109827866] [2024-12-02 06:53:15,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109827866] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:15,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:15,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:53:15,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122155828] [2024-12-02 06:53:15,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:15,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:53:15,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:15,719 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:53:15,719 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:53:15,719 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:15,782 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2024-12-02 06:53:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:53:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 06:53:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:15,784 INFO L225 Difference]: With dead ends: 31 [2024-12-02 06:53:15,784 INFO L226 Difference]: Without dead ends: 31 [2024-12-02 06:53:15,784 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:53:15,785 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 15 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:15,785 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 84 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:15,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-02 06:53:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2024-12-02 06:53:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-12-02 06:53:15,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 8 [2024-12-02 06:53:15,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:15,788 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-12-02 06:53:15,788 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:15,788 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-12-02 06:53:15,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 06:53:15,789 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:15,789 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:15,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 06:53:15,789 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:15,789 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:15,790 INFO L85 PathProgramCache]: Analyzing trace with hash -706351253, now seen corresponding path program 1 times [2024-12-02 06:53:15,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:15,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236923851] [2024-12-02 06:53:15,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:15,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:15,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:15,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236923851] [2024-12-02 06:53:15,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236923851] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:15,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358446240] [2024-12-02 06:53:15,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:15,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:15,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:15,853 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:15,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 06:53:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:15,908 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 06:53:15,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:15,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:15,982 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 06:53:15,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358446240] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:15,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 06:53:15,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2024-12-02 06:53:15,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317983336] [2024-12-02 06:53:15,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:15,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:53:15,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:15,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:53:15,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:53:15,983 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:16,010 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-12-02 06:53:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:53:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 06:53:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:16,012 INFO L225 Difference]: With dead ends: 33 [2024-12-02 06:53:16,012 INFO L226 Difference]: Without dead ends: 33 [2024-12-02 06:53:16,012 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:53:16,013 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:16,013 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 62 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-12-02 06:53:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-12-02 06:53:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 31 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) [2024-12-02 06:53:16,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-12-02 06:53:16,016 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 12 [2024-12-02 06:53:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:16,016 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-12-02 06:53:16,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-12-02 06:53:16,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 06:53:16,017 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:16,017 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:16,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 06:53:16,217 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:16,218 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:16,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:16,218 INFO L85 PathProgramCache]: Analyzing trace with hash -26292883, now seen corresponding path program 1 times [2024-12-02 06:53:16,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:16,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160306915] [2024-12-02 06:53:16,218 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:16,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:16,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:16,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:16,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160306915] [2024-12-02 06:53:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160306915] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:16,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508100071] [2024-12-02 06:53:16,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:16,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:16,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:16,431 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:16,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 06:53:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:16,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 06:53:16,477 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:16,518 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 [2024-12-02 06:53:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:16,732 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:16,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508100071] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:16,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:16,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 15 [2024-12-02 06:53:16,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271254928] [2024-12-02 06:53:16,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:16,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 06:53:16,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:16,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 06:53:16,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-12-02 06:53:16,980 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) [2024-12-02 06:53:17,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:17,126 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-12-02 06:53:17,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 06:53:17,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) Word has length 12 [2024-12-02 06:53:17,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:17,127 INFO L225 Difference]: With dead ends: 32 [2024-12-02 06:53:17,127 INFO L226 Difference]: Without dead ends: 32 [2024-12-02 06:53:17,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2024-12-02 06:53:17,128 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:17,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 158 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:17,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-12-02 06:53:17,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-12-02 06:53:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 28 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) [2024-12-02 06:53:17,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-12-02 06:53:17,131 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 12 [2024-12-02 06:53:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:17,131 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-12-02 06:53:17,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 16 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) [2024-12-02 06:53:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-12-02 06:53:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 06:53:17,132 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:17,132 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:17,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 06:53:17,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:17,333 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:17,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:17,333 INFO L85 PathProgramCache]: Analyzing trace with hash -196627025, now seen corresponding path program 1 times [2024-12-02 06:53:17,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:17,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856592880] [2024-12-02 06:53:17,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:17,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:17,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:17,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:17,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856592880] [2024-12-02 06:53:17,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856592880] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:17,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:17,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:53:17,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309988518] [2024-12-02 06:53:17,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:17,409 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 06:53:17,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:17,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 06:53:17,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 06:53:17,410 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:17,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:17,456 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-12-02 06:53:17,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 06:53:17,456 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 06:53:17,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:17,457 INFO L225 Difference]: With dead ends: 30 [2024-12-02 06:53:17,457 INFO L226 Difference]: Without dead ends: 30 [2024-12-02 06:53:17,457 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-12-02 06:53:17,457 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:17,458 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 64 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-12-02 06:53:17,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2024-12-02 06:53:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2024-12-02 06:53:17,460 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 14 [2024-12-02 06:53:17,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:17,460 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2024-12-02 06:53:17,461 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:17,461 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2024-12-02 06:53:17,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 06:53:17,461 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:17,461 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:17,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 06:53:17,461 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:17,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:17,462 INFO L85 PathProgramCache]: Analyzing trace with hash -196627024, now seen corresponding path program 1 times [2024-12-02 06:53:17,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:17,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947572343] [2024-12-02 06:53:17,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:17,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:17,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:17,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947572343] [2024-12-02 06:53:17,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947572343] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:17,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639434069] [2024-12-02 06:53:17,649 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:17,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:17,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:17,651 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:17,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 06:53:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:17,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 06:53:17,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:17,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:17,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:17,849 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 20 treesize of output 16 [2024-12-02 06:53:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:17,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639434069] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:17,868 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:17,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2024-12-02 06:53:17,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180669578] [2024-12-02 06:53:17,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:17,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 06:53:17,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:17,869 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 06:53:17,869 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-12-02 06:53:17,869 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:17,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:17,978 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-12-02 06:53:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 06:53:17,979 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 06:53:17,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:17,980 INFO L225 Difference]: With dead ends: 35 [2024-12-02 06:53:17,980 INFO L226 Difference]: Without dead ends: 35 [2024-12-02 06:53:17,980 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-12-02 06:53:17,981 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:17,981 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 167 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-12-02 06:53:17,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2024-12-02 06:53:17,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 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) [2024-12-02 06:53:17,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-12-02 06:53:17,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 14 [2024-12-02 06:53:17,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:17,984 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-12-02 06:53:17,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:17,985 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-12-02 06:53:17,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 06:53:17,985 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:17,985 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:17,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 06:53:18,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:18,186 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:18,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:18,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1799733605, now seen corresponding path program 1 times [2024-12-02 06:53:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852054683] [2024-12-02 06:53:18,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 06:53:18,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:18,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852054683] [2024-12-02 06:53:18,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852054683] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:18,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:18,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 06:53:18,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764186480] [2024-12-02 06:53:18,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:18,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:53:18,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:18,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:53:18,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:53:18,257 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2024-12-02 06:53:18,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:18,286 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2024-12-02 06:53:18,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:53:18,288 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2024-12-02 06:53:18,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:18,289 INFO L225 Difference]: With dead ends: 36 [2024-12-02 06:53:18,289 INFO L226 Difference]: Without dead ends: 36 [2024-12-02 06:53:18,289 INFO L434 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 [2024-12-02 06:53:18,290 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 4 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:18,290 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-02 06:53:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-12-02 06:53:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 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) [2024-12-02 06:53:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2024-12-02 06:53:18,293 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 15 [2024-12-02 06:53:18,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:18,293 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2024-12-02 06:53:18,293 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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) [2024-12-02 06:53:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2024-12-02 06:53:18,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 06:53:18,294 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:18,294 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:18,294 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 06:53:18,294 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:18,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:18,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1541568167, now seen corresponding path program 1 times [2024-12-02 06:53:18,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:18,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3388903] [2024-12-02 06:53:18,295 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:18,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 06:53:18,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:18,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3388903] [2024-12-02 06:53:18,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3388903] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:18,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:18,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:53:18,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360503405] [2024-12-02 06:53:18,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:18,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:53:18,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:18,377 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:53:18,377 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:53:18,378 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2024-12-02 06:53:18,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:18,399 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2024-12-02 06:53:18,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:53:18,401 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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 [2024-12-02 06:53:18,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:18,401 INFO L225 Difference]: With dead ends: 34 [2024-12-02 06:53:18,401 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 06:53:18,401 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:53:18,402 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 5 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:18,402 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 57 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:18,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 06:53:18,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2024-12-02 06:53:18,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 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) [2024-12-02 06:53:18,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2024-12-02 06:53:18,405 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 15 [2024-12-02 06:53:18,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:18,405 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2024-12-02 06:53:18,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 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) [2024-12-02 06:53:18,405 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2024-12-02 06:53:18,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 06:53:18,406 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:18,406 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:18,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 06:53:18,406 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:18,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:18,406 INFO L85 PathProgramCache]: Analyzing trace with hash 619706434, now seen corresponding path program 1 times [2024-12-02 06:53:18,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534917802] [2024-12-02 06:53:18,407 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:18,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 06:53:18,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:18,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534917802] [2024-12-02 06:53:18,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534917802] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:18,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:18,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 06:53:18,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312777686] [2024-12-02 06:53:18,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:18,491 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 06:53:18,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:18,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 06:53:18,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 06:53:18,492 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:18,503 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2024-12-02 06:53:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 06:53:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 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 17 [2024-12-02 06:53:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:18,504 INFO L225 Difference]: With dead ends: 29 [2024-12-02 06:53:18,504 INFO L226 Difference]: Without dead ends: 25 [2024-12-02 06:53:18,504 INFO L434 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 [2024-12-02 06:53:18,505 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 8 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:18,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-12-02 06:53:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-12-02 06:53:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2024-12-02 06:53:18,508 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2024-12-02 06:53:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:18,508 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2024-12-02 06:53:18,508 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2024-12-02 06:53:18,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 06:53:18,509 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:18,509 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:18,509 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 06:53:18,509 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:18,510 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash 2031076596, now seen corresponding path program 1 times [2024-12-02 06:53:18,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:18,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118812875] [2024-12-02 06:53:18,510 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:18,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 06:53:18,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:18,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118812875] [2024-12-02 06:53:18,616 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118812875] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 06:53:18,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 06:53:18,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 06:53:18,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310222552] [2024-12-02 06:53:18,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 06:53:18,617 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 06:53:18,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:18,617 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 06:53:18,617 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:53:18,617 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:18,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:18,643 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2024-12-02 06:53:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 06:53:18,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 06:53:18,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:18,644 INFO L225 Difference]: With dead ends: 31 [2024-12-02 06:53:18,644 INFO L226 Difference]: Without dead ends: 19 [2024-12-02 06:53:18,645 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 06:53:18,645 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:18,646 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 06:53:18,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-12-02 06:53:18,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-12-02 06:53:18,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:18,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2024-12-02 06:53:18,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 18 [2024-12-02 06:53:18,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:18,648 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2024-12-02 06:53:18,648 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:18,649 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2024-12-02 06:53:18,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 06:53:18,649 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:18,649 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:18,649 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 06:53:18,650 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:18,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:18,650 INFO L85 PathProgramCache]: Analyzing trace with hash 751212918, now seen corresponding path program 1 times [2024-12-02 06:53:18,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:18,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810327612] [2024-12-02 06:53:18,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:18,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:18,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810327612] [2024-12-02 06:53:18,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810327612] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:18,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306555488] [2024-12-02 06:53:18,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 06:53:18,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:18,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:18,804 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:18,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 06:53:18,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:18,863 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 06:53:18,865 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:18,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:18,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:19,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:19,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306555488] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:19,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:19,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-12-02 06:53:19,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617884315] [2024-12-02 06:53:19,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:19,057 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 06:53:19,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:19,058 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 06:53:19,058 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-12-02 06:53:19,058 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2024-12-02 06:53:19,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:19,144 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2024-12-02 06:53:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 06:53:19,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) Word has length 18 [2024-12-02 06:53:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:19,146 INFO L225 Difference]: With dead ends: 32 [2024-12-02 06:53:19,146 INFO L226 Difference]: Without dead ends: 26 [2024-12-02 06:53:19,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-12-02 06:53:19,147 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:19,147 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 97 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-12-02 06:53:19,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2024-12-02 06:53:19,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2024-12-02 06:53:19,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-12-02 06:53:19,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 18 [2024-12-02 06:53:19,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:19,149 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-12-02 06:53:19,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 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) [2024-12-02 06:53:19,150 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-12-02 06:53:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 06:53:19,150 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:19,150 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:19,159 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 06:53:19,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:19,351 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:19,351 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash -987603473, now seen corresponding path program 2 times [2024-12-02 06:53:19,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:19,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037506930] [2024-12-02 06:53:19,352 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:53:19,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:19,373 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:53:19,373 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:19,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037506930] [2024-12-02 06:53:19,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037506930] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:19,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632884645] [2024-12-02 06:53:19,729 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:53:19,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:19,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:19,731 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:19,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 06:53:19,792 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:53:19,792 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:19,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-12-02 06:53:19,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:19,918 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:19,918 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:20,094 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 [2024-12-02 06:53:20,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:20,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632884645] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:20,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:20,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 21 [2024-12-02 06:53:20,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234007693] [2024-12-02 06:53:20,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:20,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 06:53:20,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:20,125 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 06:53:20,125 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2024-12-02 06:53:20,125 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 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) [2024-12-02 06:53:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:20,254 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-12-02 06:53:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 06:53:20,254 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 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) Word has length 22 [2024-12-02 06:53:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:20,255 INFO L225 Difference]: With dead ends: 29 [2024-12-02 06:53:20,255 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 06:53:20,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2024-12-02 06:53:20,256 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:20,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 84 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:20,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 06:53:20,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2024-12-02 06:53:20,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 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) [2024-12-02 06:53:20,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2024-12-02 06:53:20,258 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 22 [2024-12-02 06:53:20,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:20,258 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2024-12-02 06:53:20,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 22 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) [2024-12-02 06:53:20,258 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2024-12-02 06:53:20,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 06:53:20,259 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:20,259 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:20,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 06:53:20,459 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:20,459 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:20,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:20,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1882311245, now seen corresponding path program 3 times [2024-12-02 06:53:20,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:20,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269558639] [2024-12-02 06:53:20,460 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:53:20,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:20,482 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 06:53:20,482 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:20,639 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:20,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269558639] [2024-12-02 06:53:20,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269558639] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:20,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13435289] [2024-12-02 06:53:20,639 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:53:20,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:20,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:20,641 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:20,643 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 06:53:20,713 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 06:53:20,713 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:20,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 06:53:20,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:20,774 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:20,774 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:20,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13435289] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:20,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:20,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2024-12-02 06:53:20,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747620693] [2024-12-02 06:53:20,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:20,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 06:53:20,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:20,954 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 06:53:20,954 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-12-02 06:53:20,955 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2024-12-02 06:53:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:21,073 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2024-12-02 06:53:21,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 06:53:21,073 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) Word has length 26 [2024-12-02 06:53:21,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:21,074 INFO L225 Difference]: With dead ends: 44 [2024-12-02 06:53:21,074 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 06:53:21,074 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2024-12-02 06:53:21,075 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 7 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:21,075 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 162 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 06:53:21,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-12-02 06:53:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:21,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-12-02 06:53:21,077 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2024-12-02 06:53:21,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:21,077 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-12-02 06:53:21,077 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 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) [2024-12-02 06:53:21,077 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-12-02 06:53:21,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-12-02 06:53:21,078 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:21,078 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:21,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 06:53:21,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 06:53:21,279 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:21,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:21,279 INFO L85 PathProgramCache]: Analyzing trace with hash 377385260, now seen corresponding path program 4 times [2024-12-02 06:53:21,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:21,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468067757] [2024-12-02 06:53:21,279 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 06:53:21,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:21,295 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 06:53:21,295 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:21,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:21,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468067757] [2024-12-02 06:53:21,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468067757] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:21,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805859082] [2024-12-02 06:53:21,556 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 06:53:21,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:21,557 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:21,558 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:21,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 06:53:21,628 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 06:53:21,629 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:21,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 06:53:21,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:21,638 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 [2024-12-02 06:53:21,815 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:21,815 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:22,114 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:22,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805859082] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:22,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:22,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2024-12-02 06:53:22,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443662277] [2024-12-02 06:53:22,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:22,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-12-02 06:53:22,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:22,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-12-02 06:53:22,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2024-12-02 06:53:22,115 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 28 states, 27 states have (on average 2.814814814814815) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:22,330 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2024-12-02 06:53:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 06:53:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.814814814814815) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-12-02 06:53:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:22,331 INFO L225 Difference]: With dead ends: 37 [2024-12-02 06:53:22,331 INFO L226 Difference]: Without dead ends: 37 [2024-12-02 06:53:22,332 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2024-12-02 06:53:22,332 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 5 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:22,332 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 206 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 06:53:22,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-12-02 06:53:22,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-12-02 06:53:22,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.088235294117647) internal successors, (37), 34 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) [2024-12-02 06:53:22,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2024-12-02 06:53:22,335 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 30 [2024-12-02 06:53:22,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:22,335 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2024-12-02 06:53:22,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.814814814814815) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:22,335 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2024-12-02 06:53:22,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 06:53:22,336 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:22,336 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:22,344 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 06:53:22,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:22,537 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:22,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:22,537 INFO L85 PathProgramCache]: Analyzing trace with hash -498834832, now seen corresponding path program 5 times [2024-12-02 06:53:22,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:22,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586542680] [2024-12-02 06:53:22,537 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 06:53:22,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:22,567 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 06:53:22,568 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:22,739 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:22,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:22,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586542680] [2024-12-02 06:53:22,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586542680] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:22,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393897960] [2024-12-02 06:53:22,739 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 06:53:22,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:22,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:22,741 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:22,743 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 06:53:22,834 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-12-02 06:53:22,835 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:22,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 06:53:22,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:22,900 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:22,900 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:23,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393897960] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:23,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:23,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-12-02 06:53:23,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408811603] [2024-12-02 06:53:23,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:23,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 06:53:23,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:23,134 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 06:53:23,134 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2024-12-02 06:53:23,134 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 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) [2024-12-02 06:53:23,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:23,265 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2024-12-02 06:53:23,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 06:53:23,266 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 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 34 [2024-12-02 06:53:23,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:23,266 INFO L225 Difference]: With dead ends: 56 [2024-12-02 06:53:23,266 INFO L226 Difference]: Without dead ends: 42 [2024-12-02 06:53:23,267 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2024-12-02 06:53:23,267 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:23,268 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 208 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:23,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-12-02 06:53:23,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-12-02 06:53:23,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 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) [2024-12-02 06:53:23,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-12-02 06:53:23,270 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 34 [2024-12-02 06:53:23,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:23,270 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-12-02 06:53:23,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 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) [2024-12-02 06:53:23,270 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-12-02 06:53:23,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-12-02 06:53:23,271 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:23,271 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:23,280 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 06:53:23,471 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 06:53:23,472 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:23,472 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:23,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1830677271, now seen corresponding path program 6 times [2024-12-02 06:53:23,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:23,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736498293] [2024-12-02 06:53:23,472 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 06:53:23,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:23,498 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 06:53:23,498 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 10 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:23,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736498293] [2024-12-02 06:53:23,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736498293] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:23,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205464515] [2024-12-02 06:53:23,909 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 06:53:23,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:23,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:23,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:23,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 06:53:24,000 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 06:53:24,000 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:24,002 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-12-02 06:53:24,004 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:24,227 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:24,228 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:24,438 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 18 [2024-12-02 06:53:24,558 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 21 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:24,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205464515] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:24,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 32 [2024-12-02 06:53:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257025566] [2024-12-02 06:53:24,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:24,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-02 06:53:24,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:24,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-02 06:53:24,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 06:53:24,560 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 33 states, 32 states have (on average 3.0) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:24,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:24,778 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2024-12-02 06:53:24,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 06:53:24,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 3.0) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 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 38 [2024-12-02 06:53:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:24,778 INFO L225 Difference]: With dead ends: 45 [2024-12-02 06:53:24,778 INFO L226 Difference]: Without dead ends: 45 [2024-12-02 06:53:24,779 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=1160, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 06:53:24,779 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:24,779 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 217 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 06:53:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-12-02 06:53:24,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2024-12-02 06:53:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-12-02 06:53:24,781 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2024-12-02 06:53:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:24,781 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-12-02 06:53:24,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 3.0) internal successors, (96), 33 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:24,781 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-12-02 06:53:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-12-02 06:53:24,782 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:24,783 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:24,790 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 06:53:24,983 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 06:53:24,983 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:24,983 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 2022039469, now seen corresponding path program 7 times [2024-12-02 06:53:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:24,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112525] [2024-12-02 06:53:24,984 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 06:53:24,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:25,224 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:25,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112525] [2024-12-02 06:53:25,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112525] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:25,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595323810] [2024-12-02 06:53:25,224 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 06:53:25,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:25,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:25,226 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:25,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 06:53:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 06:53:25,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-12-02 06:53:25,314 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:25,399 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:25,399 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:25,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595323810] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:25,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:25,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2024-12-02 06:53:25,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106842985] [2024-12-02 06:53:25,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:25,739 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 06:53:25,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:25,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 06:53:25,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2024-12-02 06:53:25,740 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 29 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:26,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:26,014 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2024-12-02 06:53:26,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 06:53:26,015 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 29 states have internal predecessors, (85), 0 states have call successors, (0), 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 [2024-12-02 06:53:26,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:26,015 INFO L225 Difference]: With dead ends: 68 [2024-12-02 06:53:26,015 INFO L226 Difference]: Without dead ends: 50 [2024-12-02 06:53:26,015 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2024-12-02 06:53:26,016 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:26,016 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 429 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 06:53:26,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-12-02 06:53:26,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2024-12-02 06:53:26,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:26,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2024-12-02 06:53:26,018 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 42 [2024-12-02 06:53:26,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:26,019 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2024-12-02 06:53:26,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 29 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:26,019 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2024-12-02 06:53:26,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 06:53:26,020 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:26,020 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:26,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 06:53:26,220 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 06:53:26,220 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:26,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:26,221 INFO L85 PathProgramCache]: Analyzing trace with hash -441841370, now seen corresponding path program 8 times [2024-12-02 06:53:26,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:26,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217830845] [2024-12-02 06:53:26,221 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:53:26,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:26,236 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:53:26,237 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:26,763 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 21 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:26,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217830845] [2024-12-02 06:53:26,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217830845] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:26,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728069917] [2024-12-02 06:53:26,764 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 06:53:26,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:26,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:26,766 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:26,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 06:53:26,849 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 06:53:26,849 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:26,851 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-12-02 06:53:26,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:27,097 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:27,371 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 [2024-12-02 06:53:27,458 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 36 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:27,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728069917] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:27,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:27,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2024-12-02 06:53:27,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520785394] [2024-12-02 06:53:27,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:27,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 06:53:27,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:27,460 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 06:53:27,460 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2024-12-02 06:53:27,460 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 35 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:27,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:27,879 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2024-12-02 06:53:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 06:53:27,879 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 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 46 [2024-12-02 06:53:27,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:27,880 INFO L225 Difference]: With dead ends: 53 [2024-12-02 06:53:27,880 INFO L226 Difference]: Without dead ends: 53 [2024-12-02 06:53:27,880 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=1382, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 06:53:27,881 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:27,881 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 343 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 06:53:27,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-12-02 06:53:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2024-12-02 06:53:27,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 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) [2024-12-02 06:53:27,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-12-02 06:53:27,883 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2024-12-02 06:53:27,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:27,884 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-12-02 06:53:27,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 35 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:27,884 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-12-02 06:53:27,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-12-02 06:53:27,885 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 06:53:27,885 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:27,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 06:53:28,085 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:28,085 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2024-12-02 06:53:28,085 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 06:53:28,086 INFO L85 PathProgramCache]: Analyzing trace with hash -2121306774, now seen corresponding path program 9 times [2024-12-02 06:53:28,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 06:53:28,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668689864] [2024-12-02 06:53:28,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:53:28,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 06:53:28,123 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 06:53:28,123 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-12-02 06:53:29,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 06:53:29,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668689864] [2024-12-02 06:53:29,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668689864] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 06:53:29,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540652931] [2024-12-02 06:53:29,059 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 06:53:29,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:29,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 06:53:29,061 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 06:53:29,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 06:53:29,175 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-12-02 06:53:29,175 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 06:53:29,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-12-02 06:53:29,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 06:53:29,537 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:29,537 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 06:53:30,159 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 10 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 06:53:30,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540652931] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 06:53:30,159 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 06:53:30,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16, 16] total 49 [2024-12-02 06:53:30,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835396581] [2024-12-02 06:53:30,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 06:53:30,160 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-12-02 06:53:30,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 06:53:30,160 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-12-02 06:53:30,161 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=2223, Unknown=0, NotChecked=0, Total=2352 [2024-12-02 06:53:30,161 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 06:53:32,635 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2024-12-02 06:53:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-12-02 06:53:32,635 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 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 50 [2024-12-02 06:53:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 06:53:32,635 INFO L225 Difference]: With dead ends: 79 [2024-12-02 06:53:32,635 INFO L226 Difference]: Without dead ends: 0 [2024-12-02 06:53:32,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=583, Invalid=7973, Unknown=0, NotChecked=0, Total=8556 [2024-12-02 06:53:32,638 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 24 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 1420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 06:53:32,638 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 309 Invalid, 1420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 06:53:32,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-12-02 06:53:32,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-12-02 06:53:32,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:32,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-12-02 06:53:32,639 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 50 [2024-12-02 06:53:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 06:53:32,639 INFO L471 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-12-02 06:53:32,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.510204081632653) internal successors, (123), 49 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 06:53:32,639 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-12-02 06:53:32,640 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-12-02 06:53:32,643 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 5 remaining) [2024-12-02 06:53:32,643 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 5 remaining) [2024-12-02 06:53:32,643 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 5 remaining) [2024-12-02 06:53:32,644 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 5 remaining) [2024-12-02 06:53:32,644 INFO L782 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK (0 of 5 remaining) [2024-12-02 06:53:32,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 06:53:32,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 06:53:32,848 INFO L422 BasicCegarLoop]: Path program histogram: [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 06:53:32,851 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2024-12-02 06:53:32,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 06:53:32 BoogieIcfgContainer [2024-12-02 06:53:32,856 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-12-02 06:53:32,857 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-12-02 06:53:32,857 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-12-02 06:53:32,858 INFO L274 PluginConnector]: Witness Printer initialized [2024-12-02 06:53:32,858 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 06:53:14" (3/4) ... [2024-12-02 06:53:32,862 INFO L146 WitnessPrinter]: Generating witness for correct program [2024-12-02 06:53:32,873 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-12-02 06:53:32,873 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2024-12-02 06:53:32,873 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2024-12-02 06:53:32,874 INFO L919 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-12-02 06:53:32,958 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/witness.graphml [2024-12-02 06:53:32,958 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/witness.yml [2024-12-02 06:53:32,958 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-12-02 06:53:32,959 INFO L158 Benchmark]: Toolchain (without parser) took 18821.24ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 92.1MB in the beginning and 97.1MB in the end (delta: -5.0MB). Peak memory consumption was 16.3MB. Max. memory is 16.1GB. [2024-12-02 06:53:32,960 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory was 73.5MB in the beginning and 73.4MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:53:32,960 INFO L158 Benchmark]: CACSL2BoogieTranslator took 335.09ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 75.3MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 06:53:32,960 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.04ms. Allocated memory is still 117.4MB. Free memory was 75.3MB in the beginning and 73.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:53:32,960 INFO L158 Benchmark]: Boogie Preprocessor took 33.16ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 72.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:53:32,961 INFO L158 Benchmark]: RCFGBuilder took 284.04ms. Allocated memory is still 117.4MB. Free memory was 72.0MB in the beginning and 59.9MB in the end (delta: 12.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 06:53:32,961 INFO L158 Benchmark]: TraceAbstraction took 18029.72ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 59.4MB in the beginning and 100.7MB in the end (delta: -41.3MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:53:32,961 INFO L158 Benchmark]: Witness Printer took 101.29ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 97.1MB in the end (delta: 3.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 06:53:32,963 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 117.4MB. Free memory was 73.5MB in the beginning and 73.4MB in the end (delta: 146.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 335.09ms. Allocated memory is still 117.4MB. Free memory was 91.8MB in the beginning and 75.3MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.04ms. Allocated memory is still 117.4MB. Free memory was 75.3MB in the beginning and 73.6MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 33.16ms. Allocated memory is still 117.4MB. Free memory was 73.6MB in the beginning and 72.3MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 284.04ms. Allocated memory is still 117.4MB. Free memory was 72.0MB in the beginning and 59.9MB in the end (delta: 12.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 18029.72ms. Allocated memory was 117.4MB in the beginning and 142.6MB in the end (delta: 25.2MB). Free memory was 59.4MB in the beginning and 100.7MB in the end (delta: -41.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 101.29ms. Allocated memory is still 142.6MB. Free memory was 100.7MB in the beginning and 97.1MB in the end (delta: 3.6MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 18.0s, OverallIterations: 20, TraceHistogramMax: 6, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 4.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 176 SdHoareTripleChecker+Valid, 2.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 176 mSDsluCounter, 2914 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2551 mSDsCounter, 52 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4233 IncrementalHoareTripleChecker+Invalid, 4285 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 52 mSolverCounterUnsat, 363 mSDtfsCounter, 4233 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 895 GetRequests, 524 SyntacticMatches, 8 SemanticMatches, 363 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3090 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=19, InterpolantAutomatonStates: 223, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 20 MinimizatonAttempts, 51 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 9.3s InterpolantComputationTime, 791 NumberOfCodeBlocks, 791 NumberOfCodeBlocksAsserted, 66 NumberOfCheckSat, 1080 ConstructedInterpolants, 0 QuantifiedInterpolants, 7377 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1646 ConjunctsInSsa, 316 ConjunctsInUnsatCore, 43 InterpolantComputations, 9 PerfectInterpolantSequences, 331/1102 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-12-02 06:53:32,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61bb6837-c1d6-47ad-95a4-84af1ecbac24/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE