./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/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_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/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 64bit --witnessprinter.graph.data.programhash 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 08:14:03,668 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 08:14:03,736 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-64bit-Automizer_Default.epf [2024-12-02 08:14:03,741 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 08:14:03,741 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 08:14:03,764 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 08:14:03,765 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 08:14:03,765 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 08:14:03,766 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 08:14:03,766 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 08:14:03,766 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 08:14:03,766 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 08:14:03,767 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 08:14:03,767 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 08:14:03,767 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 08:14:03,767 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 08:14:03,767 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 08:14:03,768 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 08:14:03,769 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 08:14:03,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 08:14:03,769 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 08:14:03,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 08:14:03,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 08:14:03,771 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_88725c67-b327-4799-8b5c-79fc2065a3ec/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 -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1bedc761cea545b8144ad4138a379d7139cc98703c76e9b536a2e7389d5b6a10 [2024-12-02 08:14:04,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 08:14:04,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 08:14:04,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 08:14:04,036 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 08:14:04,036 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 08:14:04,038 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2024-12-02 08:14:07,144 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/data/915b19ee5/7961ecc320fa48488ba0cebe5c04bb6a/FLAG1e1b2719d [2024-12-02 08:14:07,358 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 08:14:07,358 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/sv-benchmarks/c/termination-crafted/LexIndexValue-Pointer-2.c [2024-12-02 08:14:07,365 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/data/915b19ee5/7961ecc320fa48488ba0cebe5c04bb6a/FLAG1e1b2719d [2024-12-02 08:14:07,381 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/data/915b19ee5/7961ecc320fa48488ba0cebe5c04bb6a [2024-12-02 08:14:07,383 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 08:14:07,385 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 08:14:07,386 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 08:14:07,387 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 08:14:07,391 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 08:14:07,392 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,393 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a62a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07, skipping insertion in model container [2024-12-02 08:14:07,393 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 08:14:07,565 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 08:14:07,575 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 08:14:07,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 08:14:07,605 INFO L204 MainTranslator]: Completed translation [2024-12-02 08:14:07,605 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07 WrapperNode [2024-12-02 08:14:07,606 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 08:14:07,607 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 08:14:07,607 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 08:14:07,607 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 08:14:07,614 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,621 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,639 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 51 [2024-12-02 08:14:07,639 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 08:14:07,640 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 08:14:07,640 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 08:14:07,640 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 08:14:07,650 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,650 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,652 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,665 INFO L175 MemorySlicer]: Split 4 memory accesses to 1 slices as follows [4]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 2 writes are split as follows [2]. [2024-12-02 08:14:07,665 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,666 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,671 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,672 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,676 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,677 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,677 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,679 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 08:14:07,680 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 08:14:07,680 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 08:14:07,680 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 08:14:07,681 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (1/1) ... [2024-12-02 08:14:07,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 08:14:07,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:07,715 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 08:14:07,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 08:14:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 08:14:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 08:14:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 08:14:07,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 08:14:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 08:14:07,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 08:14:07,818 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 08:14:07,820 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 08:14:08,020 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-12-02 08:14:08,020 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 08:14:08,032 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 08:14:08,032 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 08:14:08,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:14:08 BoogieIcfgContainer [2024-12-02 08:14:08,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 08:14:08,035 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 08:14:08,035 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 08:14:08,039 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 08:14:08,039 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:14:07" (1/3) ... [2024-12-02 08:14:08,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc03fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:14:08, skipping insertion in model container [2024-12-02 08:14:08,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:07" (2/3) ... [2024-12-02 08:14:08,040 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc03fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:14:08, skipping insertion in model container [2024-12-02 08:14:08,040 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:14:08" (3/3) ... [2024-12-02 08:14:08,041 INFO L128 eAbstractionObserver]: Analyzing ICFG LexIndexValue-Pointer-2.c [2024-12-02 08:14:08,055 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 08:14:08,057 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG LexIndexValue-Pointer-2.c that has 1 procedures, 36 locations, 1 initial locations, 2 loop locations, and 12 error locations. [2024-12-02 08:14:08,093 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 08:14:08,105 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;@4ba183f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 08:14:08,105 INFO L334 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-12-02 08:14:08,109 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 35 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 08:14:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-12-02 08:14:08,114 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:08,114 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-12-02 08:14:08,115 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:08,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:08,120 INFO L85 PathProgramCache]: Analyzing trace with hash 28696807, now seen corresponding path program 1 times [2024-12-02 08:14:08,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:08,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694727169] [2024-12-02 08:14:08,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:08,324 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 08:14:08,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694727169] [2024-12-02 08:14:08,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694727169] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:08,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:08,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 08:14:08,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383410138] [2024-12-02 08:14:08,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:08,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 08:14:08,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:08,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 08:14:08,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 08:14:08,361 INFO L87 Difference]: Start difference. First operand has 36 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 35 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) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:08,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:08,456 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-12-02 08:14:08,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 08:14:08,459 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-12-02 08:14:08,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:08,466 INFO L225 Difference]: With dead ends: 47 [2024-12-02 08:14:08,466 INFO L226 Difference]: Without dead ends: 45 [2024-12-02 08:14:08,467 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 08:14:08,470 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 19 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:08,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:08,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-12-02 08:14:08,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2024-12-02 08:14:08,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 38 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 08:14:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2024-12-02 08:14:08,502 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 5 [2024-12-02 08:14:08,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:08,503 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2024-12-02 08:14:08,503 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:08,503 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2024-12-02 08:14:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-12-02 08:14:08,504 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:08,504 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-12-02 08:14:08,504 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 08:14:08,504 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:08,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash 28696808, now seen corresponding path program 1 times [2024-12-02 08:14:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983149039] [2024-12-02 08:14:08,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:08,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:08,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:08,642 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 08:14:08,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:08,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983149039] [2024-12-02 08:14:08,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983149039] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:08,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:08,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 08:14:08,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491677052] [2024-12-02 08:14:08,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:08,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 08:14:08,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:08,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 08:14:08,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 08:14:08,645 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:08,692 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2024-12-02 08:14:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 08:14:08,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-12-02 08:14:08,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:08,694 INFO L225 Difference]: With dead ends: 43 [2024-12-02 08:14:08,694 INFO L226 Difference]: Without dead ends: 43 [2024-12-02 08:14:08,694 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 08:14:08,695 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 1 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:08,695 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 50 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 08:14:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-12-02 08:14:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2024-12-02 08:14:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.5625) internal successors, (50), 41 states have internal predecessors, (50), 0 states have call successors, (0), 0 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 08:14:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2024-12-02 08:14:08,700 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 5 [2024-12-02 08:14:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:08,700 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2024-12-02 08:14:08,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2024-12-02 08:14:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 08:14:08,701 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:08,701 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-12-02 08:14:08,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 08:14:08,701 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:08,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:08,702 INFO L85 PathProgramCache]: Analyzing trace with hash -2139724959, now seen corresponding path program 1 times [2024-12-02 08:14:08,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:08,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964458822] [2024-12-02 08:14:08,702 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:08,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:08,860 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 08:14:08,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964458822] [2024-12-02 08:14:08,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964458822] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:08,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950303956] [2024-12-02 08:14:08,860 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:08,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:08,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:08,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:08,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 08:14:08,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:08,909 INFO L256 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 08:14:08,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:08,980 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 08:14:09,084 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 08:14:09,084 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:09,186 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 08:14:09,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950303956] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:09,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:09,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-12-02 08:14:09,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166292495] [2024-12-02 08:14:09,186 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:09,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 08:14:09,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:09,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 08:14:09,188 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-12-02 08:14:09,188 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:09,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:09,305 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2024-12-02 08:14:09,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 08:14:09,305 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 08:14:09,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:09,306 INFO L225 Difference]: With dead ends: 54 [2024-12-02 08:14:09,306 INFO L226 Difference]: Without dead ends: 54 [2024-12-02 08:14:09,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-12-02 08:14:09,307 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 4 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:09,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 71 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:09,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-12-02 08:14:09,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-12-02 08:14:09,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 53 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 08:14:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2024-12-02 08:14:09,313 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 9 [2024-12-02 08:14:09,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:09,313 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2024-12-02 08:14:09,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.5) internal successors, (21), 7 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:09,313 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2024-12-02 08:14:09,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 08:14:09,314 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:09,314 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:09,325 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 08:14:09,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:09,515 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:09,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:09,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1774974465, now seen corresponding path program 1 times [2024-12-02 08:14:09,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:09,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876179032] [2024-12-02 08:14:09,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:09,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876179032] [2024-12-02 08:14:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876179032] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682480015] [2024-12-02 08:14:09,613 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:09,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:09,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:09,616 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:09,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 08:14:09,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:09,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 08:14:09,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:09,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:09,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:09,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682480015] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:09,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:09,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-12-02 08:14:09,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414509063] [2024-12-02 08:14:09,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:09,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 08:14:09,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:09,761 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 08:14:09,761 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-12-02 08:14:09,761 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:09,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:09,967 INFO L93 Difference]: Finished difference Result 57 states and 66 transitions. [2024-12-02 08:14:09,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 08:14:09,968 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-12-02 08:14:09,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:09,968 INFO L225 Difference]: With dead ends: 57 [2024-12-02 08:14:09,968 INFO L226 Difference]: Without dead ends: 57 [2024-12-02 08:14:09,969 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2024-12-02 08:14:09,970 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:09,970 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 62 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:09,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-12-02 08:14:09,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 50. [2024-12-02 08:14:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.255813953488372) internal successors, (54), 49 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2024-12-02 08:14:09,975 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 15 [2024-12-02 08:14:09,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:09,975 INFO L471 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2024-12-02 08:14:09,975 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:09,975 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2024-12-02 08:14:09,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 08:14:09,976 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:09,976 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1] [2024-12-02 08:14:09,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 08:14:10,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-12-02 08:14:10,177 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:10,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:10,178 INFO L85 PathProgramCache]: Analyzing trace with hash 88182732, now seen corresponding path program 2 times [2024-12-02 08:14:10,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:10,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008424999] [2024-12-02 08:14:10,178 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:14:10,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:10,199 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:14:10,200 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:10,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:10,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:10,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008424999] [2024-12-02 08:14:10,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008424999] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:10,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056233327] [2024-12-02 08:14:10,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:14:10,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:10,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:10,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:10,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 08:14:10,470 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:14:10,470 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:10,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 08:14:10,473 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:10,487 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 08:14:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:10,734 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 08:14:10,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056233327] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:10,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 08:14:10,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-12-02 08:14:10,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667782427] [2024-12-02 08:14:10,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:10,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 08:14:10,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:10,735 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 08:14:10,735 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-12-02 08:14:10,735 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:10,807 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2024-12-02 08:14:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 08:14:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 08:14:10,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:10,809 INFO L225 Difference]: With dead ends: 49 [2024-12-02 08:14:10,809 INFO L226 Difference]: Without dead ends: 49 [2024-12-02 08:14:10,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2024-12-02 08:14:10,810 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:10,810 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 70 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:10,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-12-02 08:14:10,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-12-02 08:14:10,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 08:14:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2024-12-02 08:14:10,815 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 21 [2024-12-02 08:14:10,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:10,815 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2024-12-02 08:14:10,815 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:10,815 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2024-12-02 08:14:10,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 08:14:10,816 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:10,816 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:10,825 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 08:14:11,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:11,017 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:11,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:11,018 INFO L85 PathProgramCache]: Analyzing trace with hash -181572636, now seen corresponding path program 1 times [2024-12-02 08:14:11,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:11,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845430983] [2024-12-02 08:14:11,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:11,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:11,198 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 08:14:11,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:11,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845430983] [2024-12-02 08:14:11,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845430983] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:11,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:11,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 08:14:11,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246989658] [2024-12-02 08:14:11,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:11,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 08:14:11,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:11,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 08:14:11,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 08:14:11,200 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:11,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:11,266 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2024-12-02 08:14:11,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 08:14:11,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-12-02 08:14:11,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:11,267 INFO L225 Difference]: With dead ends: 65 [2024-12-02 08:14:11,267 INFO L226 Difference]: Without dead ends: 65 [2024-12-02 08:14:11,268 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 08:14:11,268 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 53 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:11,269 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 35 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:11,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-12-02 08:14:11,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2024-12-02 08:14:11,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.2037037037037037) internal successors, (65), 58 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:11,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-12-02 08:14:11,274 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 31 [2024-12-02 08:14:11,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:11,274 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-12-02 08:14:11,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:11,274 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-12-02 08:14:11,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-12-02 08:14:11,275 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:11,275 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:11,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 08:14:11,275 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:11,276 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:11,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1602545256, now seen corresponding path program 1 times [2024-12-02 08:14:11,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:11,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592329000] [2024-12-02 08:14:11,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:11,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:11,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 08:14:11,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:11,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592329000] [2024-12-02 08:14:11,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592329000] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:11,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:11,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 08:14:11,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249960840] [2024-12-02 08:14:11,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:11,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 08:14:11,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:11,405 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 08:14:11,406 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 08:14:11,406 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:11,464 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2024-12-02 08:14:11,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 08:14:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-12-02 08:14:11,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:11,465 INFO L225 Difference]: With dead ends: 60 [2024-12-02 08:14:11,465 INFO L226 Difference]: Without dead ends: 60 [2024-12-02 08:14:11,466 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 08:14:11,466 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:11,467 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 08:14:11,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-12-02 08:14:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2024-12-02 08:14:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 0 states have call successors, (0), 0 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 08:14:11,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2024-12-02 08:14:11,471 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 33 [2024-12-02 08:14:11,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:11,471 INFO L471 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2024-12-02 08:14:11,471 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:11,471 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2024-12-02 08:14:11,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 08:14:11,472 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:11,472 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:11,472 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 08:14:11,472 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:11,473 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:11,473 INFO L85 PathProgramCache]: Analyzing trace with hash -2030085045, now seen corresponding path program 1 times [2024-12-02 08:14:11,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:11,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141661512] [2024-12-02 08:14:11,473 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:11,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:11,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:11,540 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-12-02 08:14:11,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:11,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141661512] [2024-12-02 08:14:11,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141661512] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:11,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:11,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 08:14:11,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137977760] [2024-12-02 08:14:11,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:11,541 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 08:14:11,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:11,541 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 08:14:11,542 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 08:14:11,542 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 08:14:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:11,555 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2024-12-02 08:14:11,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 08:14:11,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 35 [2024-12-02 08:14:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:11,557 INFO L225 Difference]: With dead ends: 58 [2024-12-02 08:14:11,557 INFO L226 Difference]: Without dead ends: 58 [2024-12-02 08:14:11,557 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 08:14:11,558 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:11,558 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 26 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 08:14:11,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-12-02 08:14:11,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2024-12-02 08:14:11,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.1666666666666667) internal successors, (63), 57 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:11,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 63 transitions. [2024-12-02 08:14:11,563 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 63 transitions. Word has length 35 [2024-12-02 08:14:11,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:11,563 INFO L471 AbstractCegarLoop]: Abstraction has 58 states and 63 transitions. [2024-12-02 08:14:11,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 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 08:14:11,563 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 63 transitions. [2024-12-02 08:14:11,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-12-02 08:14:11,564 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:11,564 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:11,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 08:14:11,564 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:11,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:11,565 INFO L85 PathProgramCache]: Analyzing trace with hash -996572850, now seen corresponding path program 1 times [2024-12-02 08:14:11,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:11,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120073652] [2024-12-02 08:14:11,565 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:11,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:11,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:11,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120073652] [2024-12-02 08:14:11,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120073652] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:11,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796525117] [2024-12-02 08:14:11,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:11,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:11,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:11,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:11,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 08:14:11,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:11,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 08:14:11,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:11,883 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:11,883 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 08:14:12,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796525117] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:12,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:12,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-12-02 08:14:12,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108114497] [2024-12-02 08:14:12,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:12,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 08:14:12,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:12,025 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 08:14:12,026 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-12-02 08:14:12,026 INFO L87 Difference]: Start difference. First operand 58 states and 63 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 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 08:14:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:12,096 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2024-12-02 08:14:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 08:14:12,096 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 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 37 [2024-12-02 08:14:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:12,097 INFO L225 Difference]: With dead ends: 90 [2024-12-02 08:14:12,097 INFO L226 Difference]: Without dead ends: 90 [2024-12-02 08:14:12,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-12-02 08:14:12,098 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:12,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 128 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:12,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-12-02 08:14:12,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-12-02 08:14:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 86 states have (on average 1.1046511627906976) internal successors, (95), 89 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:12,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2024-12-02 08:14:12,105 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 37 [2024-12-02 08:14:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:12,105 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2024-12-02 08:14:12,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 17 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 08:14:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2024-12-02 08:14:12,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-12-02 08:14:12,107 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:12,107 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:12,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-12-02 08:14:12,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:12,308 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:12,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:12,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1356166934, now seen corresponding path program 2 times [2024-12-02 08:14:12,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:12,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110295225] [2024-12-02 08:14:12,308 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:14:12,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:12,333 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-12-02 08:14:12,334 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-12-02 08:14:12,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:12,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110295225] [2024-12-02 08:14:12,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110295225] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:12,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:12,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 08:14:12,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695569956] [2024-12-02 08:14:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:12,394 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 08:14:12,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:12,394 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 08:14:12,394 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 08:14:12,395 INFO L87 Difference]: Start difference. First operand 90 states and 95 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 08:14:12,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:12,416 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2024-12-02 08:14:12,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 08:14:12,416 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 69 [2024-12-02 08:14:12,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:12,417 INFO L225 Difference]: With dead ends: 89 [2024-12-02 08:14:12,417 INFO L226 Difference]: Without dead ends: 85 [2024-12-02 08:14:12,417 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 08:14:12,418 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:12,418 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 08:14:12,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2024-12-02 08:14:12,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2024-12-02 08:14:12,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 82 states have (on average 1.0853658536585367) internal successors, (89), 84 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2024-12-02 08:14:12,424 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 69 [2024-12-02 08:14:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:12,424 INFO L471 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2024-12-02 08:14:12,424 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 08:14:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2024-12-02 08:14:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-12-02 08:14:12,426 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:12,426 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:12,426 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 08:14:12,426 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:12,427 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:12,427 INFO L85 PathProgramCache]: Analyzing trace with hash -983879064, now seen corresponding path program 1 times [2024-12-02 08:14:12,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:12,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519846401] [2024-12-02 08:14:12,427 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:12,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:14:12,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519846401] [2024-12-02 08:14:12,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519846401] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:12,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728896136] [2024-12-02 08:14:12,878 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:12,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:12,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:12,880 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:12,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 08:14:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:12,978 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 08:14:12,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:14:13,087 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:13,499 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:14:13,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728896136] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:13,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:13,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-12-02 08:14:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967680182] [2024-12-02 08:14:13,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:13,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-02 08:14:13,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:13,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-02 08:14:13,502 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 08:14:13,502 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 33 states, 33 states have (on average 3.9696969696969697) internal successors, (131), 33 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 08:14:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:13,664 INFO L93 Difference]: Finished difference Result 149 states and 153 transitions. [2024-12-02 08:14:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 08:14:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.9696969696969697) internal successors, (131), 33 states have internal predecessors, (131), 0 states have call successors, (0), 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 70 [2024-12-02 08:14:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:13,666 INFO L225 Difference]: With dead ends: 149 [2024-12-02 08:14:13,666 INFO L226 Difference]: Without dead ends: 149 [2024-12-02 08:14:13,667 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 08:14:13,667 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:13,668 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 170 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-12-02 08:14:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2024-12-02 08:14:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 146 states have (on average 1.047945205479452) internal successors, (153), 148 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2024-12-02 08:14:13,674 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 70 [2024-12-02 08:14:13,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:13,675 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2024-12-02 08:14:13,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.9696969696969697) internal successors, (131), 33 states have internal predecessors, (131), 0 states have call successors, (0), 0 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 08:14:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2024-12-02 08:14:13,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-12-02 08:14:13,677 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:13,677 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:13,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 08:14:13,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:13,878 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:13,878 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash -644867880, now seen corresponding path program 2 times [2024-12-02 08:14:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:13,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291889669] [2024-12-02 08:14:13,879 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:14:13,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:13,933 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:14:13,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:14,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:14:14,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291889669] [2024-12-02 08:14:14,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291889669] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:14,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776088534] [2024-12-02 08:14:14,981 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 08:14:14,981 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:14,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:14,983 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:14,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 08:14:15,123 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 08:14:15,123 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:15,126 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 08:14:15,131 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:15,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:14:15,305 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:16,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 08:14:16,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776088534] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:16,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:16,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-12-02 08:14:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785097791] [2024-12-02 08:14:16,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:16,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-12-02 08:14:16,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:16,553 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-12-02 08:14:16,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 08:14:16,556 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 65 states, 65 states have (on average 3.9846153846153847) internal successors, (259), 65 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 08:14:16,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:16,848 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2024-12-02 08:14:16,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-12-02 08:14:16,849 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.9846153846153847) internal successors, (259), 65 states have internal predecessors, (259), 0 states have call successors, (0), 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 134 [2024-12-02 08:14:16,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:16,850 INFO L225 Difference]: With dead ends: 277 [2024-12-02 08:14:16,850 INFO L226 Difference]: Without dead ends: 277 [2024-12-02 08:14:16,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 08:14:16,851 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:16,851 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 116 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 08:14:16,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-12-02 08:14:16,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2024-12-02 08:14:16,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 274 states have (on average 1.0255474452554745) internal successors, (281), 276 states have internal predecessors, (281), 0 states have call successors, (0), 0 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 08:14:16,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 281 transitions. [2024-12-02 08:14:16,860 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 281 transitions. Word has length 134 [2024-12-02 08:14:16,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:16,860 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 281 transitions. [2024-12-02 08:14:16,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.9846153846153847) internal successors, (259), 65 states have internal predecessors, (259), 0 states have call successors, (0), 0 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 08:14:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 281 transitions. [2024-12-02 08:14:16,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2024-12-02 08:14:16,865 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:16,865 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:16,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 08:14:17,065 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:17,066 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:17,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:17,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1521968568, now seen corresponding path program 3 times [2024-12-02 08:14:17,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:17,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006078819] [2024-12-02 08:14:17,066 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 08:14:17,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:17,103 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 08:14:17,103 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2024-12-02 08:14:17,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006078819] [2024-12-02 08:14:17,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006078819] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:17,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206596617] [2024-12-02 08:14:17,204 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 08:14:17,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:17,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:17,206 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:17,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 08:14:17,324 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-12-02 08:14:17,324 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:17,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 08:14:17,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:17,342 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 08:14:18,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2024-12-02 08:14:18,429 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7629 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2024-12-02 08:14:19,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206596617] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:19,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:19,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2024-12-02 08:14:19,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567727862] [2024-12-02 08:14:19,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:19,640 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 08:14:19,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:19,641 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 08:14:19,641 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-12-02 08:14:19,641 INFO L87 Difference]: Start difference. First operand 277 states and 281 transitions. Second operand has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 08:14:19,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:20,000 INFO L93 Difference]: Finished difference Result 319 states and 332 transitions. [2024-12-02 08:14:20,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 08:14:20,000 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 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 262 [2024-12-02 08:14:20,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:20,002 INFO L225 Difference]: With dead ends: 319 [2024-12-02 08:14:20,002 INFO L226 Difference]: Without dead ends: 319 [2024-12-02 08:14:20,003 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 538 GetRequests, 511 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-12-02 08:14:20,003 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 239 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:20,004 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 127 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 08:14:20,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-12-02 08:14:20,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 300. [2024-12-02 08:14:20,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.0334448160535117) internal successors, (309), 299 states have internal predecessors, (309), 0 states have call successors, (0), 0 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 08:14:20,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 309 transitions. [2024-12-02 08:14:20,013 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 309 transitions. Word has length 262 [2024-12-02 08:14:20,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:20,014 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 309 transitions. [2024-12-02 08:14:20,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.888888888888889) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 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 08:14:20,014 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 309 transitions. [2024-12-02 08:14:20,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2024-12-02 08:14:20,018 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:20,019 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 08:14:20,028 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 08:14:20,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:20,219 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:20,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:20,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1040884287, now seen corresponding path program 1 times [2024-12-02 08:14:20,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:20,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551234427] [2024-12-02 08:14:20,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 08:14:20,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 08:14:20,360 INFO L134 CoverageAnalysis]: Checked inductivity of 7665 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 7641 trivial. 0 not checked. [2024-12-02 08:14:20,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:20,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551234427] [2024-12-02 08:14:20,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551234427] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 08:14:20,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 08:14:20,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 08:14:20,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349283073] [2024-12-02 08:14:20,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 08:14:20,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 08:14:20,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:20,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 08:14:20,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 08:14:20,362 INFO L87 Difference]: Start difference. First operand 300 states and 309 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 08:14:20,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:20,369 INFO L93 Difference]: Finished difference Result 303 states and 309 transitions. [2024-12-02 08:14:20,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 08:14:20,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 277 [2024-12-02 08:14:20,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:20,371 INFO L225 Difference]: With dead ends: 303 [2024-12-02 08:14:20,371 INFO L226 Difference]: Without dead ends: 300 [2024-12-02 08:14:20,371 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 08:14:20,371 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:20,371 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 08:14:20,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-12-02 08:14:20,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2024-12-02 08:14:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.020066889632107) internal successors, (305), 299 states have internal predecessors, (305), 0 states have call successors, (0), 0 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 08:14:20,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2024-12-02 08:14:20,376 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 277 [2024-12-02 08:14:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:20,377 INFO L471 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2024-12-02 08:14:20,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 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 08:14:20,377 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2024-12-02 08:14:20,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2024-12-02 08:14:20,378 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:20,378 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-12-02 08:14:20,378 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 08:14:20,378 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:20,378 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:20,378 INFO L85 PathProgramCache]: Analyzing trace with hash -778772644, now seen corresponding path program 4 times [2024-12-02 08:14:20,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752655088] [2024-12-02 08:14:20,379 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 08:14:20,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:20,487 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 08:14:20,487 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:25,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7680 backedges. 6 proven. 7659 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-12-02 08:14:25,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:14:25,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752655088] [2024-12-02 08:14:25,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752655088] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:14:25,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119201634] [2024-12-02 08:14:25,673 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 08:14:25,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:25,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:14:25,674 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:14:25,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 08:14:34,532 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 08:14:34,532 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:14:34,542 INFO L256 TraceCheckSpWp]: Trace formula consists of 906 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-12-02 08:14:34,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 08:14:38,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7680 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-12-02 08:14:38,157 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 08:14:44,598 INFO L134 CoverageAnalysis]: Checked inductivity of 7680 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-12-02 08:14:44,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119201634] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 08:14:44,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 08:14:44,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 65, 65] total 195 [2024-12-02 08:14:44,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483029970] [2024-12-02 08:14:44,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 08:14:44,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2024-12-02 08:14:44,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 08:14:44,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2024-12-02 08:14:44,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10215, Invalid=27615, Unknown=0, NotChecked=0, Total=37830 [2024-12-02 08:14:44,609 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand has 195 states, 195 states have (on average 3.9743589743589745) internal successors, (775), 195 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 08:14:49,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 08:14:49,025 INFO L93 Difference]: Finished difference Result 556 states and 561 transitions. [2024-12-02 08:14:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-12-02 08:14:49,026 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 3.9743589743589745) internal successors, (775), 195 states have internal predecessors, (775), 0 states have call successors, (0), 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 283 [2024-12-02 08:14:49,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 08:14:49,028 INFO L225 Difference]: With dead ends: 556 [2024-12-02 08:14:49,028 INFO L226 Difference]: Without dead ends: 556 [2024-12-02 08:14:49,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10013 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=20295, Invalid=46011, Unknown=0, NotChecked=0, Total=66306 [2024-12-02 08:14:49,035 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 08:14:49,035 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 376 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 08:14:49,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2024-12-02 08:14:49,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2024-12-02 08:14:49,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 1.0108108108108107) internal successors, (561), 555 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 08:14:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 561 transitions. [2024-12-02 08:14:49,043 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 561 transitions. Word has length 283 [2024-12-02 08:14:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 08:14:49,043 INFO L471 AbstractCegarLoop]: Abstraction has 556 states and 561 transitions. [2024-12-02 08:14:49,044 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 3.9743589743589745) internal successors, (775), 195 states have internal predecessors, (775), 0 states have call successors, (0), 0 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 08:14:49,044 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 561 transitions. [2024-12-02 08:14:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2024-12-02 08:14:49,046 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 08:14:49,046 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-12-02 08:14:49,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 08:14:49,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:14:49,247 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 9 more)] === [2024-12-02 08:14:49,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 08:14:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -542777956, now seen corresponding path program 5 times [2024-12-02 08:14:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 08:14:49,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240719164] [2024-12-02 08:14:49,248 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 08:14:49,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 08:14:52,101 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 127 check-sat command(s) [2024-12-02 08:14:52,102 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 08:15:04,303 INFO L134 CoverageAnalysis]: Checked inductivity of 31680 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-12-02 08:15:04,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 08:15:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240719164] [2024-12-02 08:15:04,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240719164] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 08:15:04,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638722108] [2024-12-02 08:15:04,304 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 08:15:04,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 08:15:04,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 08:15:04,305 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 08:15:04,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_88725c67-b327-4799-8b5c-79fc2065a3ec/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process