./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/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_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:28:35,242 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:28:35,296 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 12:28:35,301 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:28:35,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:28:35,321 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:28:35,322 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:28:35,322 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:28:35,322 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:28:35,322 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:28:35,323 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:28:35,323 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:28:35,323 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:28:35,323 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:28:35,323 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:28:35,323 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:28:35,323 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:28:35,324 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:28:35,325 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:28:35,325 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:28:35,325 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:28:35,326 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:28:35,326 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:28:35,326 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_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b6873ae1a0d665798beb3dd9c0c48e89806da7dd46f1d2066800a52e0a2aa51 [2024-12-02 12:28:35,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:28:35,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:28:35,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:28:35,559 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:28:35,559 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:28:35,560 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2024-12-02 12:28:38,192 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/data/a936fcfef/daed7791dd6a4a978060bd4b5d0aec61/FLAG948636ccb [2024-12-02 12:28:38,463 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:28:38,464 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/sv-benchmarks/c/array-memsafety/openbsd_cstrcpy-alloca-2.i [2024-12-02 12:28:38,476 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/data/a936fcfef/daed7791dd6a4a978060bd4b5d0aec61/FLAG948636ccb [2024-12-02 12:28:38,782 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/data/a936fcfef/daed7791dd6a4a978060bd4b5d0aec61 [2024-12-02 12:28:38,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:28:38,787 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:28:38,788 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:28:38,788 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:28:38,792 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:28:38,793 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:28:38" (1/1) ... [2024-12-02 12:28:38,793 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316bf719 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:38, skipping insertion in model container [2024-12-02 12:28:38,794 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:28:38" (1/1) ... [2024-12-02 12:28:38,818 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:28:39,044 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 12:28:39,045 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-12-02 12:28:39,048 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:28:39,057 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:28:39,097 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:28:39,126 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:28:39,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39 WrapperNode [2024-12-02 12:28:39,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:28:39,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:28:39,128 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:28:39,128 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:28:39,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,146 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,167 INFO L138 Inliner]: procedures = 117, calls = 13, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2024-12-02 12:28:39,167 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:28:39,168 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:28:39,168 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:28:39,168 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:28:39,177 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,180 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,193 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [1, 3]. 75 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 3 writes are split as follows [1, 2]. [2024-12-02 12:28:39,193 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,193 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,197 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,198 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,200 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,201 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,202 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,204 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:28:39,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:28:39,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:28:39,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:28:39,206 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (1/1) ... [2024-12-02 12:28:39,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:28:39,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:39,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:28:39,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 12:28:39,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:28:39,255 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:28:39,342 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:28:39,343 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:28:39,475 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-12-02 12:28:39,475 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:28:39,483 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:28:39,483 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 12:28:39,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:28:39 BoogieIcfgContainer [2024-12-02 12:28:39,484 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:28:39,485 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:28:39,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:28:39,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:28:39,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:28:38" (1/3) ... [2024-12-02 12:28:39,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34499691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:28:39, skipping insertion in model container [2024-12-02 12:28:39,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:28:39" (2/3) ... [2024-12-02 12:28:39,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34499691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:28:39, skipping insertion in model container [2024-12-02 12:28:39,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:28:39" (3/3) ... [2024-12-02 12:28:39,491 INFO L128 eAbstractionObserver]: Analyzing ICFG openbsd_cstrcpy-alloca-2.i [2024-12-02 12:28:39,503 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:28:39,504 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG openbsd_cstrcpy-alloca-2.i that has 1 procedures, 30 locations, 1 initial locations, 2 loop locations, and 9 error locations. [2024-12-02 12:28:39,538 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:28:39,550 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;@7f2d59d3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:28:39,550 INFO L334 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-12-02 12:28:39,555 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-02 12:28:39,559 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:39,559 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 12:28:39,560 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:39,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash 889510841, now seen corresponding path program 1 times [2024-12-02 12:28:39,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:39,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198184275] [2024-12-02 12:28:39,571 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:39,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:39,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:39,742 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 12:28:39,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:39,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198184275] [2024-12-02 12:28:39,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198184275] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:39,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:39,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:39,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224520701] [2024-12-02 12:28:39,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:39,750 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:28:39,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:39,774 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:28:39,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:39,777 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.8) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:39,841 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-12-02 12:28:39,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:39,843 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-02 12:28:39,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:39,850 INFO L225 Difference]: With dead ends: 31 [2024-12-02 12:28:39,850 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 12:28:39,852 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 12:28:39,855 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:39,856 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 80 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 12:28:39,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-12-02 12:28:39,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.65) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2024-12-02 12:28:39,890 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2024-12-02 12:28:39,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:39,890 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2024-12-02 12:28:39,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2024-12-02 12:28:39,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-02 12:28:39,891 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:39,891 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 12:28:39,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 12:28:39,891 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:39,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:39,892 INFO L85 PathProgramCache]: Analyzing trace with hash 889512763, now seen corresponding path program 1 times [2024-12-02 12:28:39,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:39,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059310714] [2024-12-02 12:28:39,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:39,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:39,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:39,929 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 12:28:39,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:39,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059310714] [2024-12-02 12:28:39,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059310714] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:39,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:39,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:28:39,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742932742] [2024-12-02 12:28:39,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:39,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:28:39,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:39,932 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:28:39,932 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:28:39,932 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:39,965 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-12-02 12:28:39,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:28:39,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-02 12:28:39,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:39,966 INFO L225 Difference]: With dead ends: 30 [2024-12-02 12:28:39,966 INFO L226 Difference]: Without dead ends: 29 [2024-12-02 12:28:39,966 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 12:28:39,967 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:39,967 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 45 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:39,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-12-02 12:28:39,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2024-12-02 12:28:39,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.631578947368421) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-12-02 12:28:39,971 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 6 [2024-12-02 12:28:39,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:39,971 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-12-02 12:28:39,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:39,971 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-12-02 12:28:39,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:28:39,971 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:39,971 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:39,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 12:28:39,972 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:39,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:39,972 INFO L85 PathProgramCache]: Analyzing trace with hash 121448370, now seen corresponding path program 1 times [2024-12-02 12:28:39,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:39,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367588434] [2024-12-02 12:28:39,973 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:39,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:40,070 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 12:28:40,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:40,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367588434] [2024-12-02 12:28:40,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367588434] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:40,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:40,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:40,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884968194] [2024-12-02 12:28:40,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:40,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:28:40,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:40,072 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:28:40,072 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:40,072 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:40,097 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2024-12-02 12:28:40,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:40,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:28:40,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:40,098 INFO L225 Difference]: With dead ends: 33 [2024-12-02 12:28:40,098 INFO L226 Difference]: Without dead ends: 33 [2024-12-02 12:28:40,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:40,099 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:40,099 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 51 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-12-02 12:28:40,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2024-12-02 12:28:40,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-12-02 12:28:40,104 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-12-02 12:28:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:40,104 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-12-02 12:28:40,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,104 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-12-02 12:28:40,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:28:40,104 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:40,105 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:40,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 12:28:40,105 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:40,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:40,105 INFO L85 PathProgramCache]: Analyzing trace with hash 121450547, now seen corresponding path program 1 times [2024-12-02 12:28:40,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:40,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138884798] [2024-12-02 12:28:40,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:40,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:40,186 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 12:28:40,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:40,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138884798] [2024-12-02 12:28:40,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138884798] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:40,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:40,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:28:40,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162433981] [2024-12-02 12:28:40,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:40,187 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:28:40,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:40,187 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:28:40,187 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:28:40,187 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:40,228 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-12-02 12:28:40,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:28:40,229 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:28:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:40,229 INFO L225 Difference]: With dead ends: 28 [2024-12-02 12:28:40,229 INFO L226 Difference]: Without dead ends: 28 [2024-12-02 12:28:40,230 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 12:28:40,231 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 5 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:40,231 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:40,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-12-02 12:28:40,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-12-02 12:28:40,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-12-02 12:28:40,234 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2024-12-02 12:28:40,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:40,234 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-12-02 12:28:40,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-12-02 12:28:40,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:28:40,235 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:40,235 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:40,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 12:28:40,235 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:40,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash 121450548, now seen corresponding path program 1 times [2024-12-02 12:28:40,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:40,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225523036] [2024-12-02 12:28:40,236 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:40,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:40,416 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 12:28:40,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:40,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225523036] [2024-12-02 12:28:40,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225523036] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:40,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:40,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:28:40,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60468457] [2024-12-02 12:28:40,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:40,417 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:28:40,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:40,418 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:28:40,418 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:40,418 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:40,469 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-12-02 12:28:40,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:40,469 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:28:40,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:40,470 INFO L225 Difference]: With dead ends: 30 [2024-12-02 12:28:40,470 INFO L226 Difference]: Without dead ends: 30 [2024-12-02 12:28:40,470 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:40,471 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:40,471 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 61 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:40,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-12-02 12:28:40,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-12-02 12:28:40,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.434782608695652) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-12-02 12:28:40,474 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 8 [2024-12-02 12:28:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:40,475 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-12-02 12:28:40,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,475 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-12-02 12:28:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:28:40,475 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:40,475 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:40,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 12:28:40,476 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:40,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash 123295412, now seen corresponding path program 1 times [2024-12-02 12:28:40,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:40,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314300222] [2024-12-02 12:28:40,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:40,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:40,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:40,535 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 12:28:40,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:40,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314300222] [2024-12-02 12:28:40,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314300222] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:40,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:40,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:40,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754229630] [2024-12-02 12:28:40,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:40,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:28:40,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:40,537 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:28:40,537 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:40,537 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:40,571 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-12-02 12:28:40,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:40,572 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:28:40,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:40,572 INFO L225 Difference]: With dead ends: 35 [2024-12-02 12:28:40,572 INFO L226 Difference]: Without dead ends: 35 [2024-12-02 12:28:40,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:40,573 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:40,573 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 68 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:40,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-12-02 12:28:40,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2024-12-02 12:28:40,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-12-02 12:28:40,577 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 8 [2024-12-02 12:28:40,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:40,577 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-12-02 12:28:40,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,577 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-12-02 12:28:40,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:28:40,578 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:40,578 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:40,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 12:28:40,578 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:40,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:40,579 INFO L85 PathProgramCache]: Analyzing trace with hash 123297590, now seen corresponding path program 1 times [2024-12-02 12:28:40,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:40,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485555643] [2024-12-02 12:28:40,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:40,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:40,740 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 12:28:40,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:40,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485555643] [2024-12-02 12:28:40,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485555643] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:40,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:40,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:40,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935544237] [2024-12-02 12:28:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:40,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:28:40,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:40,741 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:28:40,741 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:40,742 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:40,770 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2024-12-02 12:28:40,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:28:40,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:28:40,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:40,771 INFO L225 Difference]: With dead ends: 32 [2024-12-02 12:28:40,771 INFO L226 Difference]: Without dead ends: 32 [2024-12-02 12:28:40,771 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:40,772 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:40,772 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 32 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:40,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-12-02 12:28:40,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2024-12-02 12:28:40,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2024-12-02 12:28:40,775 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 8 [2024-12-02 12:28:40,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:40,775 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2024-12-02 12:28:40,776 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,776 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2024-12-02 12:28:40,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-12-02 12:28:40,776 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:40,776 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:40,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 12:28:40,776 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:40,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:40,777 INFO L85 PathProgramCache]: Analyzing trace with hash 180553714, now seen corresponding path program 1 times [2024-12-02 12:28:40,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:40,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658570089] [2024-12-02 12:28:40,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:40,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:40,917 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 12:28:40,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:40,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658570089] [2024-12-02 12:28:40,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658570089] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:40,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:40,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:40,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483130162] [2024-12-02 12:28:40,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:40,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:28:40,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:40,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:28:40,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:40,919 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:40,982 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2024-12-02 12:28:40,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:28:40,983 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-12-02 12:28:40,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:40,983 INFO L225 Difference]: With dead ends: 32 [2024-12-02 12:28:40,983 INFO L226 Difference]: Without dead ends: 32 [2024-12-02 12:28:40,984 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 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 12:28:40,984 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:40,985 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:40,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-12-02 12:28:40,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2024-12-02 12:28:40,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.44) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-12-02 12:28:40,988 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 8 [2024-12-02 12:28:40,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:40,988 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-12-02 12:28:40,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:40,988 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-12-02 12:28:40,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 12:28:40,988 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:40,988 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:40,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 12:28:40,989 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:40,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:40,990 INFO L85 PathProgramCache]: Analyzing trace with hash 749859031, now seen corresponding path program 1 times [2024-12-02 12:28:40,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:40,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115464772] [2024-12-02 12:28:40,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:40,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:41,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:41,039 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 12:28:41,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:41,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115464772] [2024-12-02 12:28:41,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115464772] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:41,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:41,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:28:41,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704536728] [2024-12-02 12:28:41,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:41,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:28:41,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:41,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:28:41,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:41,041 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:41,086 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-12-02 12:28:41,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:41,087 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-12-02 12:28:41,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:41,087 INFO L225 Difference]: With dead ends: 30 [2024-12-02 12:28:41,087 INFO L226 Difference]: Without dead ends: 30 [2024-12-02 12:28:41,087 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 12:28:41,088 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:41,088 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 34 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:41,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-12-02 12:28:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-12-02 12:28:41,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-12-02 12:28:41,091 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2024-12-02 12:28:41,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:41,091 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-12-02 12:28:41,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,091 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-12-02 12:28:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 12:28:41,091 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:41,092 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:41,092 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 12:28:41,092 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:41,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:41,092 INFO L85 PathProgramCache]: Analyzing trace with hash 749859032, now seen corresponding path program 1 times [2024-12-02 12:28:41,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:41,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856600668] [2024-12-02 12:28:41,093 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:41,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:41,202 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 12:28:41,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:41,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856600668] [2024-12-02 12:28:41,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856600668] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:41,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:41,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:28:41,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939290578] [2024-12-02 12:28:41,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:41,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:28:41,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:41,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:28:41,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:28:41,204 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:41,269 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2024-12-02 12:28:41,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:28:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-12-02 12:28:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:41,270 INFO L225 Difference]: With dead ends: 40 [2024-12-02 12:28:41,270 INFO L226 Difference]: Without dead ends: 40 [2024-12-02 12:28:41,270 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:28:41,271 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 21 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:41,271 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 57 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:41,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-12-02 12:28:41,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2024-12-02 12:28:41,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-12-02 12:28:41,274 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 10 [2024-12-02 12:28:41,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:41,274 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-12-02 12:28:41,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,274 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-12-02 12:28:41,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 12:28:41,275 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:41,275 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:41,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 12:28:41,275 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:41,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:41,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1770793499, now seen corresponding path program 1 times [2024-12-02 12:28:41,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:41,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630933325] [2024-12-02 12:28:41,276 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:41,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:41,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:41,382 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 12:28:41,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:41,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630933325] [2024-12-02 12:28:41,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630933325] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:41,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:41,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:41,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962729688] [2024-12-02 12:28:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:41,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:28:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:41,384 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:28:41,384 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:41,384 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 12:28:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:41,413 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2024-12-02 12:28:41,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:41,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 11 [2024-12-02 12:28:41,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:41,414 INFO L225 Difference]: With dead ends: 30 [2024-12-02 12:28:41,414 INFO L226 Difference]: Without dead ends: 30 [2024-12-02 12:28:41,414 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:41,415 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 17 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:41,415 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:41,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-12-02 12:28:41,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-12-02 12:28:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2024-12-02 12:28:41,418 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 11 [2024-12-02 12:28:41,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:41,418 INFO L471 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2024-12-02 12:28:41,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 12:28:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2024-12-02 12:28:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 12:28:41,418 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:41,418 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:41,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 12:28:41,419 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:41,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1770793500, now seen corresponding path program 1 times [2024-12-02 12:28:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:41,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852422833] [2024-12-02 12:28:41,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:41,578 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 12:28:41,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:41,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852422833] [2024-12-02 12:28:41,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852422833] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:41,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:41,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:28:41,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354924777] [2024-12-02 12:28:41,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:41,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:28:41,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:41,580 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:28:41,580 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:41,580 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 12:28:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:41,622 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-12-02 12:28:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:28:41,623 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 11 [2024-12-02 12:28:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:41,623 INFO L225 Difference]: With dead ends: 41 [2024-12-02 12:28:41,623 INFO L226 Difference]: Without dead ends: 41 [2024-12-02 12:28:41,623 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:28:41,624 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 5 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:41,624 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 67 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:41,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-12-02 12:28:41,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-12-02 12:28:41,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2024-12-02 12:28:41,627 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 11 [2024-12-02 12:28:41,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:41,627 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2024-12-02 12:28:41,627 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 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 12:28:41,627 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2024-12-02 12:28:41,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-12-02 12:28:41,628 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:41,628 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:41,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 12:28:41,628 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:41,628 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:41,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1844115426, now seen corresponding path program 1 times [2024-12-02 12:28:41,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:41,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490721014] [2024-12-02 12:28:41,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:41,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:41,806 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 12:28:41,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:41,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490721014] [2024-12-02 12:28:41,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490721014] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:41,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:41,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:28:41,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308591562] [2024-12-02 12:28:41,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:41,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:28:41,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:41,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:28:41,808 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:28:41,808 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 12:28:41,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:41,848 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2024-12-02 12:28:41,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:28:41,849 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 11 [2024-12-02 12:28:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:41,849 INFO L225 Difference]: With dead ends: 42 [2024-12-02 12:28:41,849 INFO L226 Difference]: Without dead ends: 42 [2024-12-02 12:28:41,850 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:28:41,850 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 11 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:41,850 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 50 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:41,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-12-02 12:28:41,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 31. [2024-12-02 12:28:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:41,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2024-12-02 12:28:41,854 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 11 [2024-12-02 12:28:41,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:41,854 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2024-12-02 12:28:41,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 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 12:28:41,854 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2024-12-02 12:28:41,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-12-02 12:28:41,854 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:41,855 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:41,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 12:28:41,855 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:41,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:41,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1630335403, now seen corresponding path program 1 times [2024-12-02 12:28:41,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:41,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780060369] [2024-12-02 12:28:41,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:42,102 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 12:28:42,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:42,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780060369] [2024-12-02 12:28:42,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780060369] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253214102] [2024-12-02 12:28:42,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:42,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:42,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:42,105 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:42,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:28:42,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:42,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 12:28:42,166 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:42,219 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-12-02 12:28:42,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:28:42,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:42,483 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:42,712 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 12:28:42,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253214102] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:42,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:42,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-12-02 12:28:42,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218973955] [2024-12-02 12:28:42,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:42,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 12:28:42,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:42,713 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 12:28:42,713 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:28:42,714 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:42,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:42,909 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2024-12-02 12:28:42,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:28:42,910 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2024-12-02 12:28:42,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:42,911 INFO L225 Difference]: With dead ends: 32 [2024-12-02 12:28:42,911 INFO L226 Difference]: Without dead ends: 32 [2024-12-02 12:28:42,912 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-12-02 12:28:42,912 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 19 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:42,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 101 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:42,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-12-02 12:28:42,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-12-02 12:28:42,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2024-12-02 12:28:42,915 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 12 [2024-12-02 12:28:42,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:42,916 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2024-12-02 12:28:42,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.125) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2024-12-02 12:28:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 12:28:42,916 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:42,916 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:42,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:28:43,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 12:28:43,117 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:43,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:43,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1374145103, now seen corresponding path program 1 times [2024-12-02 12:28:43,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:43,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697541292] [2024-12-02 12:28:43,118 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:43,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:43,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:43,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697541292] [2024-12-02 12:28:43,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697541292] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:43,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:43,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 12:28:43,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194171931] [2024-12-02 12:28:43,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:43,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 12:28:43,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:43,260 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 12:28:43,260 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-12-02 12:28:43,261 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:43,310 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2024-12-02 12:28:43,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:28:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 12:28:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:43,311 INFO L225 Difference]: With dead ends: 37 [2024-12-02 12:28:43,311 INFO L226 Difference]: Without dead ends: 37 [2024-12-02 12:28:43,312 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:28:43,312 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:43,313 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 93 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-12-02 12:28:43,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2024-12-02 12:28:43,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2024-12-02 12:28:43,315 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 14 [2024-12-02 12:28:43,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:43,315 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2024-12-02 12:28:43,316 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,316 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2024-12-02 12:28:43,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 12:28:43,316 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:43,316 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:43,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 12:28:43,317 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:43,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:43,317 INFO L85 PathProgramCache]: Analyzing trace with hash -673080525, now seen corresponding path program 1 times [2024-12-02 12:28:43,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:43,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574658517] [2024-12-02 12:28:43,317 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:43,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:43,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574658517] [2024-12-02 12:28:43,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574658517] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:43,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:43,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 12:28:43,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581884187] [2024-12-02 12:28:43,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:43,485 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 12:28:43,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:43,485 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 12:28:43,485 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:28:43,485 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:43,543 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2024-12-02 12:28:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:28:43,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 12:28:43,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:43,544 INFO L225 Difference]: With dead ends: 51 [2024-12-02 12:28:43,544 INFO L226 Difference]: Without dead ends: 51 [2024-12-02 12:28:43,544 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:28:43,545 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:43,545 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 94 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:43,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-12-02 12:28:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 33. [2024-12-02 12:28:43,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-12-02 12:28:43,548 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 14 [2024-12-02 12:28:43,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:43,548 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-12-02 12:28:43,548 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,548 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-12-02 12:28:43,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 12:28:43,548 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:43,548 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:43,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 12:28:43,549 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:43,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:43,549 INFO L85 PathProgramCache]: Analyzing trace with hash -414915087, now seen corresponding path program 1 times [2024-12-02 12:28:43,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:43,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573908501] [2024-12-02 12:28:43,549 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:43,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:43,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:43,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573908501] [2024-12-02 12:28:43,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573908501] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:43,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:43,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 12:28:43,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325554566] [2024-12-02 12:28:43,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:43,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 12:28:43,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:43,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 12:28:43,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:28:43,719 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:43,788 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-12-02 12:28:43,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:28:43,789 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-12-02 12:28:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:43,789 INFO L225 Difference]: With dead ends: 45 [2024-12-02 12:28:43,789 INFO L226 Difference]: Without dead ends: 45 [2024-12-02 12:28:43,789 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:28:43,790 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:43,790 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 89 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-12-02 12:28:43,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 34. [2024-12-02 12:28:43,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 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 12:28:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-12-02 12:28:43,792 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 14 [2024-12-02 12:28:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:43,792 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-12-02 12:28:43,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-12-02 12:28:43,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-12-02 12:28:43,793 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:43,793 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:43,793 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 12:28:43,793 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:43,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 351238754, now seen corresponding path program 1 times [2024-12-02 12:28:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:43,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632889758] [2024-12-02 12:28:43,794 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:43,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:43,917 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 12:28:43,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632889758] [2024-12-02 12:28:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632889758] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:28:43,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:28:43,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:28:43,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344783839] [2024-12-02 12:28:43,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:28:43,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:28:43,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:43,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:28:43,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:43,919 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:43,934 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2024-12-02 12:28:43,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 12:28:43,935 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2024-12-02 12:28:43,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:43,935 INFO L225 Difference]: With dead ends: 33 [2024-12-02 12:28:43,935 INFO L226 Difference]: Without dead ends: 21 [2024-12-02 12:28:43,935 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:28:43,936 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:43,936 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 34 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 12:28:43,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-12-02 12:28:43,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-12-02 12:28:43,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 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 12:28:43,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-12-02 12:28:43,937 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 15 [2024-12-02 12:28:43,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:43,938 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-12-02 12:28:43,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-12-02 12:28:43,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 12:28:43,938 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:43,938 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:43,938 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 12:28:43,938 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:43,939 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash -784539414, now seen corresponding path program 1 times [2024-12-02 12:28:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528823349] [2024-12-02 12:28:43,939 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:43,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:44,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:44,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:44,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528823349] [2024-12-02 12:28:44,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528823349] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:44,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344403729] [2024-12-02 12:28:44,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:44,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:44,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:44,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:44,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:28:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:44,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 12:28:44,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:44,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:44,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:44,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:28:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:44,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344403729] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:44,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:44,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-12-02 12:28:44,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301650203] [2024-12-02 12:28:44,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:44,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-12-02 12:28:44,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:44,490 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-12-02 12:28:44,490 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:28:44,490 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:44,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:44,590 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-12-02 12:28:44,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:28:44,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 12:28:44,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:44,591 INFO L225 Difference]: With dead ends: 31 [2024-12-02 12:28:44,591 INFO L226 Difference]: Without dead ends: 31 [2024-12-02 12:28:44,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2024-12-02 12:28:44,592 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:44,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 68 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-12-02 12:28:44,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2024-12-02 12:28:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-12-02 12:28:44,593 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 18 [2024-12-02 12:28:44,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:44,594 INFO L471 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-12-02 12:28:44,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.375) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-12-02 12:28:44,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 12:28:44,594 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:44,594 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:44,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:28:44,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:44,795 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:44,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:44,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1449081930, now seen corresponding path program 1 times [2024-12-02 12:28:44,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:44,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117184493] [2024-12-02 12:28:44,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:44,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:45,085 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 12:28:45,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:45,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117184493] [2024-12-02 12:28:45,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117184493] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:45,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791818855] [2024-12-02 12:28:45,085 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:28:45,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:45,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:45,087 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:45,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:28:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:28:45,162 INFO L256 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 12:28:45,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:45,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:28:45,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:28:45,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:28:45,602 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 12:28:45,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:45,836 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:28:45,891 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 12:28:45,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791818855] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:45,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 23 [2024-12-02 12:28:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329380556] [2024-12-02 12:28:45,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:45,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 12:28:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:45,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 12:28:45,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-12-02 12:28:45,893 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 12:28:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:46,032 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-12-02 12:28:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 12:28:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 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 19 [2024-12-02 12:28:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:46,033 INFO L225 Difference]: With dead ends: 34 [2024-12-02 12:28:46,033 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 12:28:46,034 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2024-12-02 12:28:46,034 INFO L435 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:46,034 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 67 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 12:28:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2024-12-02 12:28:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-12-02 12:28:46,036 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 19 [2024-12-02 12:28:46,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:46,036 INFO L471 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-12-02 12:28:46,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.391304347826087) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 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 12:28:46,036 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-12-02 12:28:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 12:28:46,037 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:46,037 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:46,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-12-02 12:28:46,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:46,237 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:46,238 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:46,238 INFO L85 PathProgramCache]: Analyzing trace with hash 883477699, now seen corresponding path program 2 times [2024-12-02 12:28:46,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:46,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214026491] [2024-12-02 12:28:46,238 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:28:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:46,266 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:28:46,266 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:46,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:46,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214026491] [2024-12-02 12:28:46,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214026491] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:46,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731132038] [2024-12-02 12:28:46,643 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:28:46,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:46,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:46,647 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:46,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:28:46,720 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:28:46,720 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:46,722 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-12-02 12:28:46,724 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:46,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:28:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:46,842 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:46,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:28:46,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:28:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:46,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731132038] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:46,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:46,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 20 [2024-12-02 12:28:46,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582634074] [2024-12-02 12:28:46,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:46,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-12-02 12:28:46,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:46,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-12-02 12:28:46,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-12-02 12:28:46,922 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 12:28:47,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:47,104 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-12-02 12:28:47,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:28:47,104 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 12:28:47,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:47,105 INFO L225 Difference]: With dead ends: 42 [2024-12-02 12:28:47,105 INFO L226 Difference]: Without dead ends: 32 [2024-12-02 12:28:47,105 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2024-12-02 12:28:47,106 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 24 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:47,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 102 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:47,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-12-02 12:28:47,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2024-12-02 12:28:47,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-12-02 12:28:47,109 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 22 [2024-12-02 12:28:47,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:47,110 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-12-02 12:28:47,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 12:28:47,110 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-12-02 12:28:47,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 12:28:47,110 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:47,110 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:47,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:28:47,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:47,311 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:47,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:47,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1117175484, now seen corresponding path program 3 times [2024-12-02 12:28:47,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:47,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343193573] [2024-12-02 12:28:47,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:28:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:47,331 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 12:28:47,331 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:47,558 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343193573] [2024-12-02 12:28:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343193573] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371686348] [2024-12-02 12:28:47,558 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:28:47,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:47,558 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:47,560 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:47,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:28:47,637 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 12:28:47,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:47,638 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 12:28:47,640 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:47,649 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 12:28:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:47,770 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:48,031 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:48,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371686348] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:48,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:48,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-12-02 12:28:48,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799549874] [2024-12-02 12:28:48,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:48,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-12-02 12:28:48,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:48,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-12-02 12:28:48,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2024-12-02 12:28:48,033 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 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 12:28:48,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:48,170 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-12-02 12:28:48,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:28:48,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 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) Word has length 26 [2024-12-02 12:28:48,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:48,171 INFO L225 Difference]: With dead ends: 36 [2024-12-02 12:28:48,171 INFO L226 Difference]: Without dead ends: 36 [2024-12-02 12:28:48,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-12-02 12:28:48,172 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:48,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 84 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 12:28:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-12-02 12:28:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2024-12-02 12:28:48,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-12-02 12:28:48,174 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 26 [2024-12-02 12:28:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:48,175 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-12-02 12:28:48,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 3.25) internal successors, (65), 21 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 12:28:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-12-02 12:28:48,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 12:28:48,175 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:48,175 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:48,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-12-02 12:28:48,376 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 12:28:48,376 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:48,376 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:48,376 INFO L85 PathProgramCache]: Analyzing trace with hash 272701624, now seen corresponding path program 2 times [2024-12-02 12:28:48,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:48,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547886639] [2024-12-02 12:28:48,376 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:28:48,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:48,394 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:28:48,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:48,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:48,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547886639] [2024-12-02 12:28:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547886639] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796425325] [2024-12-02 12:28:48,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:28:48,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:48,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:48,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:48,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:28:48,846 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:28:48,846 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:48,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-12-02 12:28:48,850 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:48,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:28:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:28:48,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:28:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:49,460 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:49,954 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:28:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:50,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796425325] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:50,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:50,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 29 [2024-12-02 12:28:50,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222316337] [2024-12-02 12:28:50,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:50,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 12:28:50,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:50,001 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 12:28:50,002 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=752, Unknown=0, NotChecked=0, Total=870 [2024-12-02 12:28:50,002 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 12:28:50,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:50,446 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2024-12-02 12:28:50,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:28:50,446 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2024-12-02 12:28:50,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:50,447 INFO L225 Difference]: With dead ends: 42 [2024-12-02 12:28:50,447 INFO L226 Difference]: Without dead ends: 42 [2024-12-02 12:28:50,447 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=186, Invalid=1146, Unknown=0, NotChecked=0, Total=1332 [2024-12-02 12:28:50,448 INFO L435 NwaCegarLoop]: 11 mSDtfsCounter, 28 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:50,448 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 111 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:28:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-12-02 12:28:50,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2024-12-02 12:28:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-12-02 12:28:50,450 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2024-12-02 12:28:50,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:50,450 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-12-02 12:28:50,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 30 states have internal predecessors, (79), 0 states have call successors, (0), 0 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 12:28:50,450 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-12-02 12:28:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-12-02 12:28:50,451 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:50,451 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:50,460 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:28:50,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:50,651 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:50,652 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:50,652 INFO L85 PathProgramCache]: Analyzing trace with hash -2024050283, now seen corresponding path program 4 times [2024-12-02 12:28:50,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:50,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169667712] [2024-12-02 12:28:50,652 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:28:50,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:50,668 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:28:50,668 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:51,244 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-12-02 12:28:51,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:51,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169667712] [2024-12-02 12:28:51,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169667712] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:51,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922082500] [2024-12-02 12:28:51,244 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:28:51,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:51,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:51,247 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:51,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:28:51,335 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:28:51,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:51,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-12-02 12:28:51,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:51,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-12-02 12:28:52,317 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:28:52,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 121 [2024-12-02 12:28:52,730 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 12:28:52,730 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:53,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2024-12-02 12:28:53,192 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2024-12-02 12:28:53,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:28:53,338 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:53,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922082500] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:53,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:53,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 38 [2024-12-02 12:28:53,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676284967] [2024-12-02 12:28:53,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:53,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-12-02 12:28:53,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:53,339 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-12-02 12:28:53,339 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2024-12-02 12:28:53,340 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 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 12:28:53,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:53,913 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-12-02 12:28:53,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 12:28:53,914 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 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) Word has length 30 [2024-12-02 12:28:53,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:53,914 INFO L225 Difference]: With dead ends: 34 [2024-12-02 12:28:53,914 INFO L226 Difference]: Without dead ends: 34 [2024-12-02 12:28:53,915 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=329, Invalid=1563, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 12:28:53,915 INFO L435 NwaCegarLoop]: 6 mSDtfsCounter, 12 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:53,915 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:28:53,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-12-02 12:28:53,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-12-02 12:28:53,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:53,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-12-02 12:28:53,917 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 30 [2024-12-02 12:28:53,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:53,917 INFO L471 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-12-02 12:28:53,917 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 39 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 12:28:53,917 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-12-02 12:28:53,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 12:28:53,917 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:53,917 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:53,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 12:28:54,118 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:54,118 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:54,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:54,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1678950655, now seen corresponding path program 3 times [2024-12-02 12:28:54,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:54,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452082283] [2024-12-02 12:28:54,119 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:28:54,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:54,143 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 12:28:54,143 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:54,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:54,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:54,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452082283] [2024-12-02 12:28:54,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452082283] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:54,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186986251] [2024-12-02 12:28:54,430 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:28:54,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:54,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:54,432 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:54,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:28:54,536 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-12-02 12:28:54,536 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:54,537 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-12-02 12:28:54,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:54,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:28:54,694 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:54,694 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:54,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:28:54,717 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:28:54,784 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:54,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186986251] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:54,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:54,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 25 [2024-12-02 12:28:54,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151387135] [2024-12-02 12:28:54,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:54,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 12:28:54,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:54,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 12:28:54,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2024-12-02 12:28:54,785 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 12:28:55,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:55,129 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2024-12-02 12:28:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 12:28:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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) Word has length 31 [2024-12-02 12:28:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:55,129 INFO L225 Difference]: With dead ends: 53 [2024-12-02 12:28:55,130 INFO L226 Difference]: Without dead ends: 39 [2024-12-02 12:28:55,130 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=1105, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 12:28:55,131 INFO L435 NwaCegarLoop]: 10 mSDtfsCounter, 30 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:55,131 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 132 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:28:55,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-12-02 12:28:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2024-12-02 12:28:55,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:55,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-12-02 12:28:55,132 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2024-12-02 12:28:55,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:55,132 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-12-02 12:28:55,133 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 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 12:28:55,133 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-12-02 12:28:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 12:28:55,133 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:55,133 INFO L218 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:55,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:28:55,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:55,334 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:55,334 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:55,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1873999654, now seen corresponding path program 4 times [2024-12-02 12:28:55,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:55,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29083450] [2024-12-02 12:28:55,334 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:28:55,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:55,356 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:28:55,356 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:55,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:55,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29083450] [2024-12-02 12:28:55,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29083450] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:55,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686311397] [2024-12-02 12:28:55,742 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:28:55,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:55,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:55,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:55,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 12:28:55,859 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:28:55,859 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:55,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 12:28:55,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:55,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:28:55,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:28:55,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:28:56,498 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:56,498 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:56,997 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:28:57,048 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:57,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686311397] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:57,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:57,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 14] total 35 [2024-12-02 12:28:57,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486293507] [2024-12-02 12:28:57,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:57,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 12:28:57,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:57,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 12:28:57,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1106, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 12:28:57,050 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 12:28:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:57,627 INFO L93 Difference]: Finished difference Result 49 states and 51 transitions. [2024-12-02 12:28:57,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-12-02 12:28:57,627 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 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 12:28:57,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:57,627 INFO L225 Difference]: With dead ends: 49 [2024-12-02 12:28:57,628 INFO L226 Difference]: Without dead ends: 49 [2024-12-02 12:28:57,628 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=261, Invalid=1809, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 12:28:57,629 INFO L435 NwaCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:57,629 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 147 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:28:57,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-12-02 12:28:57,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2024-12-02 12:28:57,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 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 12:28:57,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2024-12-02 12:28:57,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2024-12-02 12:28:57,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:57,631 INFO L471 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2024-12-02 12:28:57,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.942857142857143) internal successors, (103), 36 states have internal predecessors, (103), 0 states have call successors, (0), 0 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 12:28:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2024-12-02 12:28:57,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-12-02 12:28:57,631 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:57,631 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:57,638 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 12:28:57,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-12-02 12:28:57,832 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:57,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:57,832 INFO L85 PathProgramCache]: Analyzing trace with hash -512509843, now seen corresponding path program 5 times [2024-12-02 12:28:57,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:57,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988447464] [2024-12-02 12:28:57,832 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:28:57,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:57,855 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 12:28:57,856 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:58,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988447464] [2024-12-02 12:28:58,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988447464] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:58,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612918100] [2024-12-02 12:28:58,208 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:28:58,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:58,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:58,209 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:58,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 12:28:58,300 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-12-02 12:28:58,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:58,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 12:28:58,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:58,386 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:28:58,502 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:58,502 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:28:58,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:28:58,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:28:58,585 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:58,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612918100] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:28:58,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:28:58,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 29 [2024-12-02 12:28:58,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57058188] [2024-12-02 12:28:58,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:28:58,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-12-02 12:28:58,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:28:58,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-12-02 12:28:58,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2024-12-02 12:28:58,587 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:59,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:28:59,097 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2024-12-02 12:28:59,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 12:28:59,097 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-12-02 12:28:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:28:59,097 INFO L225 Difference]: With dead ends: 65 [2024-12-02 12:28:59,097 INFO L226 Difference]: Without dead ends: 47 [2024-12-02 12:28:59,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 12:28:59,098 INFO L435 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:28:59,098 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 215 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:28:59,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-12-02 12:28:59,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-12-02 12:28:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-12-02 12:28:59,099 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 39 [2024-12-02 12:28:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:28:59,100 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-12-02 12:28:59,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:28:59,100 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-12-02 12:28:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 12:28:59,100 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:28:59,100 INFO L218 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:28:59,106 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 12:28:59,300 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-12-02 12:28:59,301 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:28:59,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:28:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1391122324, now seen corresponding path program 6 times [2024-12-02 12:28:59,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:28:59,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840882111] [2024-12-02 12:28:59,301 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:28:59,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:28:59,335 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 12:28:59,335 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:59,644 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 6 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:28:59,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:28:59,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840882111] [2024-12-02 12:28:59,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840882111] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:28:59,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385625240] [2024-12-02 12:28:59,644 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:28:59,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:28:59,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:28:59,646 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:28:59,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 12:28:59,745 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-12-02 12:28:59,745 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:28:59,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-12-02 12:28:59,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:28:59,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:28:59,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:28:59,782 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:00,446 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:00,447 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:00,873 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:00,915 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385625240] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:00,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 40 [2024-12-02 12:29:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320023428] [2024-12-02 12:29:00,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:00,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 12:29:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:00,916 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 12:29:00,916 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 12:29:00,917 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 12:29:01,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:01,264 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2024-12-02 12:29:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 12:29:01,265 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 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 43 [2024-12-02 12:29:01,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:01,265 INFO L225 Difference]: With dead ends: 57 [2024-12-02 12:29:01,265 INFO L226 Difference]: Without dead ends: 57 [2024-12-02 12:29:01,265 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=281, Invalid=1789, Unknown=0, NotChecked=0, Total=2070 [2024-12-02 12:29:01,265 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:01,266 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 152 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:29:01,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-12-02 12:29:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2024-12-02 12:29:01,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:01,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-12-02 12:29:01,267 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2024-12-02 12:29:01,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:01,268 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-12-02 12:29:01,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 3.175) internal successors, (127), 41 states have internal predecessors, (127), 0 states have call successors, (0), 0 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 12:29:01,268 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-12-02 12:29:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-12-02 12:29:01,268 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:01,268 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:01,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 12:29:01,468 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-12-02 12:29:01,469 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:01,469 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash -1412845093, now seen corresponding path program 7 times [2024-12-02 12:29:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:01,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863417047] [2024-12-02 12:29:01,469 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:29:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:01,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:29:01,900 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 33 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:01,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:01,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863417047] [2024-12-02 12:29:01,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863417047] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:01,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227581850] [2024-12-02 12:29:01,900 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:29:01,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:01,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:01,902 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:01,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 12:29:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:29:02,009 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 12:29:02,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:02,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:02,299 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:02,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:02,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227581850] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:02,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:02,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2024-12-02 12:29:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146217645] [2024-12-02 12:29:02,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:02,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-12-02 12:29:02,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:02,392 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-12-02 12:29:02,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2024-12-02 12:29:02,392 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 12:29:03,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:03,032 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2024-12-02 12:29:03,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 12:29:03,033 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 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 47 [2024-12-02 12:29:03,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:03,033 INFO L225 Difference]: With dead ends: 77 [2024-12-02 12:29:03,033 INFO L226 Difference]: Without dead ends: 55 [2024-12-02 12:29:03,033 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=196, Invalid=2060, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 12:29:03,034 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:03,034 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 295 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:29:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-12-02 12:29:03,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2024-12-02 12:29:03,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:03,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2024-12-02 12:29:03,036 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2024-12-02 12:29:03,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:03,036 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2024-12-02 12:29:03,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 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 12:29:03,036 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2024-12-02 12:29:03,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-12-02 12:29:03,036 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:03,036 INFO L218 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:03,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 12:29:03,237 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-12-02 12:29:03,237 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:03,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:03,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1776371198, now seen corresponding path program 8 times [2024-12-02 12:29:03,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:03,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805417841] [2024-12-02 12:29:03,237 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:29:03,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:03,255 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:29:03,255 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:03,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805417841] [2024-12-02 12:29:03,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805417841] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049367040] [2024-12-02 12:29:03,773 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:29:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:03,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:03,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 12:29:03,970 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:29:03,970 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:03,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-12-02 12:29:03,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:04,006 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:04,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:29:04,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:04,916 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:05,643 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:05,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049367040] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:05,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:05,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 46 [2024-12-02 12:29:05,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081722266] [2024-12-02 12:29:05,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:05,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-12-02 12:29:05,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:05,698 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-12-02 12:29:05,698 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1915, Unknown=0, NotChecked=0, Total=2162 [2024-12-02 12:29:05,698 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 47 states, 46 states have (on average 3.282608695652174) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:29:06,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:06,243 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2024-12-02 12:29:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 12:29:06,244 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 3.282608695652174) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2024-12-02 12:29:06,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:06,244 INFO L225 Difference]: With dead ends: 65 [2024-12-02 12:29:06,244 INFO L226 Difference]: Without dead ends: 65 [2024-12-02 12:29:06,245 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=316, Invalid=2440, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 12:29:06,245 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:06,245 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 244 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:29:06,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-12-02 12:29:06,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 56. [2024-12-02 12:29:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 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 12:29:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-12-02 12:29:06,247 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 51 [2024-12-02 12:29:06,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:06,247 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-12-02 12:29:06,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 3.282608695652174) internal successors, (151), 47 states have internal predecessors, (151), 0 states have call successors, (0), 0 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 12:29:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-12-02 12:29:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-12-02 12:29:06,248 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:06,248 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:06,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 12:29:06,448 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:06,448 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:06,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:06,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1807045303, now seen corresponding path program 9 times [2024-12-02 12:29:06,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:06,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304407753] [2024-12-02 12:29:06,449 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:29:06,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:06,484 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 12:29:06,484 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:07,014 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 51 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:07,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:07,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304407753] [2024-12-02 12:29:07,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304407753] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:07,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654474607] [2024-12-02 12:29:07,014 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:29:07,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:07,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:07,016 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:07,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 12:29:07,226 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-12-02 12:29:07,226 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:07,228 INFO L256 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-12-02 12:29:07,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:07,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:07,570 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:07,570 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:07,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:07,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:07,716 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:07,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654474607] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:07,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:07,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2024-12-02 12:29:07,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504597583] [2024-12-02 12:29:07,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:07,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 12:29:07,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:07,718 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 12:29:07,718 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 12:29:07,718 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:08,565 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2024-12-02 12:29:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 12:29:08,565 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2024-12-02 12:29:08,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:08,565 INFO L225 Difference]: With dead ends: 89 [2024-12-02 12:29:08,565 INFO L226 Difference]: Without dead ends: 63 [2024-12-02 12:29:08,566 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=239, Invalid=2731, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 12:29:08,566 INFO L435 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:08,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 347 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:29:08,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-12-02 12:29:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2024-12-02 12:29:08,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 12:29:08,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-12-02 12:29:08,568 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2024-12-02 12:29:08,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:08,568 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-12-02 12:29:08,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.0555555555555554) internal successors, (110), 36 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:08,568 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-12-02 12:29:08,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-12-02 12:29:08,568 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:08,569 INFO L218 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:08,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 12:29:08,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-12-02 12:29:08,769 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:08,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:08,769 INFO L85 PathProgramCache]: Analyzing trace with hash 327458416, now seen corresponding path program 10 times [2024-12-02 12:29:08,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:08,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467527030] [2024-12-02 12:29:08,770 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:29:08,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:08,791 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:29:08,791 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:09,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467527030] [2024-12-02 12:29:09,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467527030] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283675559] [2024-12-02 12:29:09,364 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:29:09,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:09,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:09,366 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:09,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 12:29:09,502 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:29:09,502 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:09,505 INFO L256 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-12-02 12:29:09,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:09,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:09,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:29:09,546 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 45 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:10,480 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:11,385 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 66 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:11,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283675559] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:11,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:11,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 17] total 50 [2024-12-02 12:29:11,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712503500] [2024-12-02 12:29:11,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:11,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-12-02 12:29:11,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:11,432 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-12-02 12:29:11,432 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 12:29:11,432 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 51 states, 50 states have (on average 3.5) internal successors, (175), 51 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 12:29:11,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:11,898 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-12-02 12:29:11,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 12:29:11,898 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.5) internal successors, (175), 51 states have internal predecessors, (175), 0 states have call successors, (0), 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 59 [2024-12-02 12:29:11,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:11,899 INFO L225 Difference]: With dead ends: 66 [2024-12-02 12:29:11,899 INFO L226 Difference]: Without dead ends: 66 [2024-12-02 12:29:11,900 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2024-12-02 12:29:11,900 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:11,900 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 348 Invalid, 978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:29:11,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-12-02 12:29:11,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2024-12-02 12:29:11,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2024-12-02 12:29:11,904 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2024-12-02 12:29:11,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:11,904 INFO L471 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2024-12-02 12:29:11,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.5) internal successors, (175), 51 states have internal predecessors, (175), 0 states have call successors, (0), 0 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 12:29:11,904 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2024-12-02 12:29:11,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-12-02 12:29:11,905 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:11,905 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:11,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 12:29:12,105 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-12-02 12:29:12,105 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:12,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:12,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1781312183, now seen corresponding path program 11 times [2024-12-02 12:29:12,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:12,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583308011] [2024-12-02 12:29:12,106 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:29:12,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:12,134 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 12:29:12,134 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 91 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:12,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:12,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583308011] [2024-12-02 12:29:12,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583308011] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:12,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492479931] [2024-12-02 12:29:12,644 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:29:12,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:12,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:12,645 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:12,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 12:29:12,834 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-12-02 12:29:12,834 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:12,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-12-02 12:29:12,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:13,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:13,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:13,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:13,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:13,436 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 20 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:13,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492479931] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:13,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:13,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 41 [2024-12-02 12:29:13,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573895709] [2024-12-02 12:29:13,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:13,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-12-02 12:29:13,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:13,437 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-12-02 12:29:13,437 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-12-02 12:29:13,437 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:14,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:14,449 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2024-12-02 12:29:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 12:29:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2024-12-02 12:29:14,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:14,450 INFO L225 Difference]: With dead ends: 101 [2024-12-02 12:29:14,450 INFO L226 Difference]: Without dead ends: 71 [2024-12-02 12:29:14,451 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=3841, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 12:29:14,451 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 43 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 1348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:14,451 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 491 Invalid, 1348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 12:29:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-12-02 12:29:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 68. [2024-12-02 12:29:14,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-12-02 12:29:14,453 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 63 [2024-12-02 12:29:14,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:14,453 INFO L471 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-12-02 12:29:14,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.073170731707317) internal successors, (126), 41 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:14,453 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-12-02 12:29:14,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-12-02 12:29:14,453 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:14,453 INFO L218 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:14,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 12:29:14,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:14,654 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:14,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:14,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1554873122, now seen corresponding path program 12 times [2024-12-02 12:29:14,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:14,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273546236] [2024-12-02 12:29:14,655 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:29:14,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:14,684 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 12:29:14,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:15,160 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 45 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:15,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:15,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273546236] [2024-12-02 12:29:15,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273546236] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:15,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045736177] [2024-12-02 12:29:15,160 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:29:15,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:15,162 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:15,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 12:29:15,622 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-12-02 12:29:15,622 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:15,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-12-02 12:29:15,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:15,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:15,670 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 12:29:15,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 12:29:16,837 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 66 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:16,837 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:17,620 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:17,667 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 91 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:17,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045736177] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:17,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:17,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 54 [2024-12-02 12:29:17,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123278757] [2024-12-02 12:29:17,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:17,668 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-12-02 12:29:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:17,668 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-12-02 12:29:17,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=2558, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 12:29:17,669 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 55 states, 54 states have (on average 3.685185185185185) internal successors, (199), 55 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 12:29:18,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:18,094 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2024-12-02 12:29:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 12:29:18,094 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 3.685185185185185) internal successors, (199), 55 states have internal predecessors, (199), 0 states have call successors, (0), 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 67 [2024-12-02 12:29:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:18,094 INFO L225 Difference]: With dead ends: 74 [2024-12-02 12:29:18,094 INFO L226 Difference]: Without dead ends: 74 [2024-12-02 12:29:18,095 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=442, Invalid=2750, Unknown=0, NotChecked=0, Total=3192 [2024-12-02 12:29:18,095 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 11 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:18,095 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 263 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:29:18,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-12-02 12:29:18,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2024-12-02 12:29:18,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 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 12:29:18,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-12-02 12:29:18,097 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2024-12-02 12:29:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:18,097 INFO L471 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-12-02 12:29:18,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 3.685185185185185) internal successors, (199), 55 states have internal predecessors, (199), 0 states have call successors, (0), 0 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 12:29:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-12-02 12:29:18,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2024-12-02 12:29:18,097 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:18,097 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:18,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-12-02 12:29:18,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:18,298 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:18,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:18,298 INFO L85 PathProgramCache]: Analyzing trace with hash -89806299, now seen corresponding path program 13 times [2024-12-02 12:29:18,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:18,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554641189] [2024-12-02 12:29:18,298 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:29:18,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:18,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:29:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 99 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:18,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:18,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554641189] [2024-12-02 12:29:18,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554641189] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:18,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075845261] [2024-12-02 12:29:18,973 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:29:18,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:18,975 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:18,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 12:29:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:29:19,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 12:29:19,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:19,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:19,629 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:19,629 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:19,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:19,672 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 23 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:19,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075845261] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:19,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:19,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2024-12-02 12:29:19,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727678187] [2024-12-02 12:29:19,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:19,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-12-02 12:29:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:19,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-12-02 12:29:19,785 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 12:29:19,786 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 12:29:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:21,106 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2024-12-02 12:29:21,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-12-02 12:29:21,106 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 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 71 [2024-12-02 12:29:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:21,107 INFO L225 Difference]: With dead ends: 113 [2024-12-02 12:29:21,107 INFO L226 Difference]: Without dead ends: 79 [2024-12-02 12:29:21,108 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=337, Invalid=4355, Unknown=0, NotChecked=0, Total=4692 [2024-12-02 12:29:21,108 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 1508 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:21,108 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 549 Invalid, 1528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1508 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 12:29:21,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-12-02 12:29:21,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 76. [2024-12-02 12:29:21,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 0 states have call successors, (0), 0 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 12:29:21,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2024-12-02 12:29:21,109 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2024-12-02 12:29:21,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:21,109 INFO L471 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2024-12-02 12:29:21,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.227272727272727) internal successors, (142), 44 states have internal predecessors, (142), 0 states have call successors, (0), 0 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 12:29:21,110 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2024-12-02 12:29:21,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-12-02 12:29:21,110 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:21,110 INFO L218 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:21,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 12:29:21,310 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-12-02 12:29:21,311 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:21,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:21,311 INFO L85 PathProgramCache]: Analyzing trace with hash 465464652, now seen corresponding path program 14 times [2024-12-02 12:29:21,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:21,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673490499] [2024-12-02 12:29:21,311 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:29:21,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:21,341 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:29:21,341 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 66 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:22,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673490499] [2024-12-02 12:29:22,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673490499] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:22,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100156941] [2024-12-02 12:29:22,064 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:29:22,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:22,066 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:22,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 12:29:22,212 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:29:22,212 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:22,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-12-02 12:29:22,217 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:22,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:22,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:29:22,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:23,612 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:23,612 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:24,715 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:24,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100156941] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:24,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:24,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 63 [2024-12-02 12:29:24,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487433861] [2024-12-02 12:29:24,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:24,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-12-02 12:29:24,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:24,769 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-12-02 12:29:24,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=3700, Unknown=0, NotChecked=0, Total=4032 [2024-12-02 12:29:24,770 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 64 states, 63 states have (on average 3.5396825396825395) internal successors, (223), 64 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 12:29:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:26,010 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2024-12-02 12:29:26,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 12:29:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.5396825396825395) internal successors, (223), 64 states have internal predecessors, (223), 0 states have call successors, (0), 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 75 [2024-12-02 12:29:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:26,011 INFO L225 Difference]: With dead ends: 89 [2024-12-02 12:29:26,011 INFO L226 Difference]: Without dead ends: 89 [2024-12-02 12:29:26,011 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=458, Invalid=4798, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 12:29:26,012 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 669 mSDsCounter, 0 mSdLazyCounter, 2028 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2028 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:26,012 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 691 Invalid, 2038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2028 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 12:29:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-12-02 12:29:26,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-12-02 12:29:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 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 12:29:26,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-12-02 12:29:26,013 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 75 [2024-12-02 12:29:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:26,013 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-12-02 12:29:26,013 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.5396825396825395) internal successors, (223), 64 states have internal predecessors, (223), 0 states have call successors, (0), 0 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 12:29:26,014 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-12-02 12:29:26,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-12-02 12:29:26,014 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:26,014 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:26,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 12:29:26,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-12-02 12:29:26,214 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:26,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:26,215 INFO L85 PathProgramCache]: Analyzing trace with hash 283880339, now seen corresponding path program 15 times [2024-12-02 12:29:26,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:26,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919324953] [2024-12-02 12:29:26,215 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:29:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:26,265 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 12:29:26,265 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:27,073 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 129 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:27,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919324953] [2024-12-02 12:29:27,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919324953] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:27,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583633759] [2024-12-02 12:29:27,073 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:29:27,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:27,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:27,075 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:27,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 12:29:27,488 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-12-02 12:29:27,488 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:27,492 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-12-02 12:29:27,494 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:27,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:28,112 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:28,112 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:28,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:28,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 26 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:28,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583633759] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:28,268 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:28,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2024-12-02 12:29:28,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823482407] [2024-12-02 12:29:28,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:28,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 12:29:28,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:28,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 12:29:28,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2115, Unknown=0, NotChecked=0, Total=2256 [2024-12-02 12:29:28,270 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 12:29:29,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:29,785 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2024-12-02 12:29:29,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-12-02 12:29:29,785 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 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 79 [2024-12-02 12:29:29,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:29,786 INFO L225 Difference]: With dead ends: 125 [2024-12-02 12:29:29,786 INFO L226 Difference]: Without dead ends: 87 [2024-12-02 12:29:29,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=392, Invalid=5308, Unknown=0, NotChecked=0, Total=5700 [2024-12-02 12:29:29,787 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 682 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:29,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 682 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 12:29:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-12-02 12:29:29,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-12-02 12:29:29,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:29,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2024-12-02 12:29:29,788 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2024-12-02 12:29:29,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:29,789 INFO L471 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2024-12-02 12:29:29,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.2916666666666665) internal successors, (158), 48 states have internal predecessors, (158), 0 states have call successors, (0), 0 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 12:29:29,789 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2024-12-02 12:29:29,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-12-02 12:29:29,789 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:29,789 INFO L218 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:29,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 12:29:29,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-12-02 12:29:29,990 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:29,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:29,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1358845882, now seen corresponding path program 16 times [2024-12-02 12:29:29,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:29,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510121670] [2024-12-02 12:29:29,990 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:29:29,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:30,059 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:29:30,059 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:30,762 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:30,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:30,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510121670] [2024-12-02 12:29:30,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510121670] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:30,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496449593] [2024-12-02 12:29:30,763 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:29:30,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:30,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:30,764 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:30,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 12:29:31,050 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:29:31,050 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:31,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 95 conjuncts are in the unsatisfiable core [2024-12-02 12:29:31,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:31,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:31,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:29:31,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 120 proven. 195 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:32,630 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:34,041 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 153 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:34,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496449593] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:34,092 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:34,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 66 [2024-12-02 12:29:34,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008990680] [2024-12-02 12:29:34,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:34,093 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-12-02 12:29:34,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:34,094 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-12-02 12:29:34,094 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=3889, Unknown=0, NotChecked=0, Total=4422 [2024-12-02 12:29:34,094 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 67 states, 66 states have (on average 3.742424242424242) internal successors, (247), 67 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 12:29:34,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:34,764 INFO L93 Difference]: Finished difference Result 90 states and 91 transitions. [2024-12-02 12:29:34,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-12-02 12:29:34,764 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 3.742424242424242) internal successors, (247), 67 states have internal predecessors, (247), 0 states have call successors, (0), 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 83 [2024-12-02 12:29:34,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:34,765 INFO L225 Difference]: With dead ends: 90 [2024-12-02 12:29:34,765 INFO L226 Difference]: Without dead ends: 90 [2024-12-02 12:29:34,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=565, Invalid=3991, Unknown=0, NotChecked=0, Total=4556 [2024-12-02 12:29:34,765 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 11 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 1436 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 498 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:34,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 498 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1436 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 12:29:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-12-02 12:29:34,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-12-02 12:29:34,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:34,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-12-02 12:29:34,767 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2024-12-02 12:29:34,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:34,767 INFO L471 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-12-02 12:29:34,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 3.742424242424242) internal successors, (247), 67 states have internal predecessors, (247), 0 states have call successors, (0), 0 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 12:29:34,767 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-12-02 12:29:34,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-12-02 12:29:34,768 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:34,768 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:34,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 12:29:34,968 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-12-02 12:29:34,968 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:34,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:34,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1983164161, now seen corresponding path program 17 times [2024-12-02 12:29:34,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:34,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354546780] [2024-12-02 12:29:34,969 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:29:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:35,007 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 12:29:35,007 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:35,843 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 190 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:35,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:35,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354546780] [2024-12-02 12:29:35,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354546780] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:35,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50133092] [2024-12-02 12:29:35,843 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:29:35,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:35,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:35,845 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:35,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 12:29:36,333 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-12-02 12:29:36,333 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:36,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-12-02 12:29:36,339 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:36,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:37,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 12:29:37,074 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:37,075 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:37,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:37,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:37,239 INFO L134 CoverageAnalysis]: Checked inductivity of 353 backedges. 29 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:37,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50133092] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:37,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:37,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 53 [2024-12-02 12:29:37,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357789065] [2024-12-02 12:29:37,240 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:37,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 12:29:37,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:37,240 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 12:29:37,241 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2587, Unknown=0, NotChecked=0, Total=2756 [2024-12-02 12:29:37,241 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 53 states, 53 states have (on average 3.2830188679245285) internal successors, (174), 53 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:39,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:39,004 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2024-12-02 12:29:39,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 12:29:39,004 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.2830188679245285) internal successors, (174), 53 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2024-12-02 12:29:39,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:39,005 INFO L225 Difference]: With dead ends: 137 [2024-12-02 12:29:39,005 INFO L226 Difference]: Without dead ends: 95 [2024-12-02 12:29:39,005 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1260 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=493, Invalid=6817, Unknown=0, NotChecked=0, Total=7310 [2024-12-02 12:29:39,005 INFO L435 NwaCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 2176 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 782 SdHoareTripleChecker+Invalid, 2212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:39,006 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 782 Invalid, 2212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2176 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 12:29:39,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-12-02 12:29:39,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2024-12-02 12:29:39,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 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 12:29:39,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2024-12-02 12:29:39,007 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 87 [2024-12-02 12:29:39,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:39,007 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2024-12-02 12:29:39,007 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.2830188679245285) internal successors, (174), 53 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:39,007 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2024-12-02 12:29:39,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-12-02 12:29:39,008 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:39,008 INFO L218 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:39,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 12:29:39,208 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-12-02 12:29:39,208 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:39,209 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:39,209 INFO L85 PathProgramCache]: Analyzing trace with hash 357057576, now seen corresponding path program 18 times [2024-12-02 12:29:39,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:39,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854960467] [2024-12-02 12:29:39,209 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:29:39,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:39,252 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 12:29:39,252 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:39,919 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 120 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:39,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854960467] [2024-12-02 12:29:39,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854960467] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112479631] [2024-12-02 12:29:39,919 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:29:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:39,921 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:39,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 12:29:40,988 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-12-02 12:29:40,989 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:40,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 113 conjuncts are in the unsatisfiable core [2024-12-02 12:29:40,997 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:41,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:41,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:29:41,039 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:42,735 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:42,735 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:44,017 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:44,080 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:44,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112479631] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:44,080 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:44,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 26, 27] total 76 [2024-12-02 12:29:44,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630618058] [2024-12-02 12:29:44,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:44,081 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-12-02 12:29:44,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:44,081 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-12-02 12:29:44,081 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=689, Invalid=5163, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 12:29:44,082 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 77 states, 76 states have (on average 3.5657894736842106) internal successors, (271), 77 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 12:29:45,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:45,484 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2024-12-02 12:29:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 12:29:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 3.5657894736842106) internal successors, (271), 77 states have internal predecessors, (271), 0 states have call successors, (0), 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 91 [2024-12-02 12:29:45,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:45,485 INFO L225 Difference]: With dead ends: 105 [2024-12-02 12:29:45,485 INFO L226 Difference]: Without dead ends: 105 [2024-12-02 12:29:45,486 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2838 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=863, Invalid=6793, Unknown=0, NotChecked=0, Total=7656 [2024-12-02 12:29:45,486 INFO L435 NwaCegarLoop]: 26 mSDtfsCounter, 39 mSDsluCounter, 721 mSDsCounter, 0 mSdLazyCounter, 2239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 2249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 2239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:45,486 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 747 Invalid, 2249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 2239 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 12:29:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-12-02 12:29:45,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 96. [2024-12-02 12:29:45,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:45,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2024-12-02 12:29:45,488 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2024-12-02 12:29:45,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:45,488 INFO L471 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2024-12-02 12:29:45,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 3.5657894736842106) internal successors, (271), 77 states have internal predecessors, (271), 0 states have call successors, (0), 0 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 12:29:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2024-12-02 12:29:45,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2024-12-02 12:29:45,489 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:45,489 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:45,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 12:29:45,689 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-12-02 12:29:45,689 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:45,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:45,689 INFO L85 PathProgramCache]: Analyzing trace with hash -239684497, now seen corresponding path program 19 times [2024-12-02 12:29:45,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:45,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810985303] [2024-12-02 12:29:45,690 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:29:45,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:45,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:29:46,777 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 201 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:46,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810985303] [2024-12-02 12:29:46,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810985303] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:46,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893628280] [2024-12-02 12:29:46,778 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:29:46,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:46,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:46,779 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:46,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 12:29:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:29:46,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-12-02 12:29:46,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:47,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:29:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:47,833 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:47,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:29:47,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:29:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 32 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:48,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893628280] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:48,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:48,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2024-12-02 12:29:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998785559] [2024-12-02 12:29:48,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:48,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-12-02 12:29:48,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:48,019 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-12-02 12:29:48,019 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2904, Unknown=0, NotChecked=0, Total=3080 [2024-12-02 12:29:48,019 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 12:29:50,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:50,295 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2024-12-02 12:29:50,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 12:29:50,295 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 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 95 [2024-12-02 12:29:50,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:50,296 INFO L225 Difference]: With dead ends: 149 [2024-12-02 12:29:50,296 INFO L226 Difference]: Without dead ends: 103 [2024-12-02 12:29:50,296 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1359 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=514, Invalid=7496, Unknown=0, NotChecked=0, Total=8010 [2024-12-02 12:29:50,297 INFO L435 NwaCegarLoop]: 27 mSDtfsCounter, 31 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 2621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:50,297 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 928 Invalid, 2621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-12-02 12:29:50,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-12-02 12:29:50,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2024-12-02 12:29:50,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:29:50,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2024-12-02 12:29:50,298 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2024-12-02 12:29:50,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:50,298 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2024-12-02 12:29:50,299 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.392857142857143) internal successors, (190), 56 states have internal predecessors, (190), 0 states have call successors, (0), 0 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 12:29:50,299 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2024-12-02 12:29:50,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-12-02 12:29:50,299 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:50,299 INFO L218 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:50,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 12:29:50,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:50,499 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:50,500 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:50,500 INFO L85 PathProgramCache]: Analyzing trace with hash 953299606, now seen corresponding path program 20 times [2024-12-02 12:29:50,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:50,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830572836] [2024-12-02 12:29:50,500 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:29:50,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:50,528 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:29:50,528 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 153 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830572836] [2024-12-02 12:29:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830572836] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856782096] [2024-12-02 12:29:51,509 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:29:51,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:51,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:51,511 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:51,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 12:29:51,684 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:29:51,684 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:51,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 119 conjuncts are in the unsatisfiable core [2024-12-02 12:29:51,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:29:51,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:29:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:29:51,732 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:29:53,824 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:53,825 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:29:55,569 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:29:55,642 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 473 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:55,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856782096] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:29:55,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:29:55,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 81 [2024-12-02 12:29:55,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237091524] [2024-12-02 12:29:55,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:29:55,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-12-02 12:29:55,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:29:55,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-12-02 12:29:55,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=6142, Unknown=0, NotChecked=0, Total=6642 [2024-12-02 12:29:55,644 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 82 states, 81 states have (on average 3.6419753086419755) internal successors, (295), 82 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 12:29:57,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:29:57,668 INFO L93 Difference]: Finished difference Result 113 states and 115 transitions. [2024-12-02 12:29:57,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 12:29:57,668 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 3.6419753086419755) internal successors, (295), 82 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2024-12-02 12:29:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:29:57,669 INFO L225 Difference]: With dead ends: 113 [2024-12-02 12:29:57,669 INFO L226 Difference]: Without dead ends: 113 [2024-12-02 12:29:57,669 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2351 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=701, Invalid=8041, Unknown=0, NotChecked=0, Total=8742 [2024-12-02 12:29:57,670 INFO L435 NwaCegarLoop]: 28 mSDtfsCounter, 53 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 3130 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 3143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 3130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:29:57,670 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1056 Invalid, 3143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 3130 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 12:29:57,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-12-02 12:29:57,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 104. [2024-12-02 12:29:57,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 0 states have call successors, (0), 0 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 12:29:57,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2024-12-02 12:29:57,673 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 99 [2024-12-02 12:29:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:29:57,673 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2024-12-02 12:29:57,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 3.6419753086419755) internal successors, (295), 82 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 12:29:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2024-12-02 12:29:57,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-12-02 12:29:57,674 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:29:57,674 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:29:57,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-12-02 12:29:57,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:57,874 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:29:57,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:29:57,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1218952157, now seen corresponding path program 21 times [2024-12-02 12:29:57,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:29:57,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271514530] [2024-12-02 12:29:57,875 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:29:57,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:29:57,949 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-12-02 12:29:57,949 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:29:59,047 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 243 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:29:59,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:29:59,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271514530] [2024-12-02 12:29:59,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271514530] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:29:59,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799752902] [2024-12-02 12:29:59,047 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:29:59,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:29:59,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:29:59,049 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:29:59,050 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 12:30:00,425 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-12-02 12:30:00,425 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:00,431 INFO L256 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 117 conjuncts are in the unsatisfiable core [2024-12-02 12:30:00,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:30:01,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:30:01,849 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:01,849 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:30:02,521 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:30:02,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:30:03,286 INFO L134 CoverageAnalysis]: Checked inductivity of 519 backedges. 35 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:03,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799752902] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:30:03,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:30:03,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 85 [2024-12-02 12:30:03,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512583072] [2024-12-02 12:30:03,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:30:03,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2024-12-02 12:30:03,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:30:03,288 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2024-12-02 12:30:03,288 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=6868, Unknown=0, NotChecked=0, Total=7140 [2024-12-02 12:30:03,288 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 85 states, 85 states have (on average 3.4705882352941178) internal successors, (295), 85 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 12:30:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:30:07,174 INFO L93 Difference]: Finished difference Result 161 states and 162 transitions. [2024-12-02 12:30:07,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-12-02 12:30:07,174 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.4705882352941178) internal successors, (295), 85 states have internal predecessors, (295), 0 states have call successors, (0), 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 103 [2024-12-02 12:30:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:30:07,175 INFO L225 Difference]: With dead ends: 161 [2024-12-02 12:30:07,175 INFO L226 Difference]: Without dead ends: 111 [2024-12-02 12:30:07,176 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=698, Invalid=14308, Unknown=0, NotChecked=0, Total=15006 [2024-12-02 12:30:07,176 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 30 mSDsluCounter, 1450 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-12-02 12:30:07,176 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1480 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-12-02 12:30:07,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-12-02 12:30:07,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2024-12-02 12:30:07,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 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 12:30:07,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2024-12-02 12:30:07,179 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2024-12-02 12:30:07,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:30:07,179 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2024-12-02 12:30:07,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.4705882352941178) internal successors, (295), 85 states have internal predecessors, (295), 0 states have call successors, (0), 0 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 12:30:07,180 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2024-12-02 12:30:07,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2024-12-02 12:30:07,180 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:30:07,180 INFO L218 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:30:07,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-12-02 12:30:07,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:07,381 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:30:07,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:30:07,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1982717180, now seen corresponding path program 22 times [2024-12-02 12:30:07,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:30:07,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848197424] [2024-12-02 12:30:07,381 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:30:07,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:30:07,421 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:30:07,421 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 231 proven. 333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:08,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:30:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848197424] [2024-12-02 12:30:08,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848197424] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:30:08,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356749350] [2024-12-02 12:30:08,766 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:30:08,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:08,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:30:08,767 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:30:08,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-12-02 12:30:09,672 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:30:09,673 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:09,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 133 conjuncts are in the unsatisfiable core [2024-12-02 12:30:09,682 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:30:09,730 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:30:09,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:30:09,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:30:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:12,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:30:14,573 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:30:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 276 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:14,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356749350] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:30:14,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:30:14,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 86 [2024-12-02 12:30:14,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341132524] [2024-12-02 12:30:14,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:30:14,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-12-02 12:30:14,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:30:14,655 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-12-02 12:30:14,655 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=828, Invalid=6654, Unknown=0, NotChecked=0, Total=7482 [2024-12-02 12:30:14,655 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 87 states, 86 states have (on average 3.7093023255813953) internal successors, (319), 87 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 12:30:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:30:15,857 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2024-12-02 12:30:15,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-12-02 12:30:15,857 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 3.7093023255813953) internal successors, (319), 87 states have internal predecessors, (319), 0 states have call successors, (0), 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 107 [2024-12-02 12:30:15,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:30:15,858 INFO L225 Difference]: With dead ends: 117 [2024-12-02 12:30:15,858 INFO L226 Difference]: Without dead ends: 117 [2024-12-02 12:30:15,858 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 157 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2513 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=890, Invalid=6942, Unknown=0, NotChecked=0, Total=7832 [2024-12-02 12:30:15,859 INFO L435 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:30:15,859 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 852 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 12:30:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-12-02 12:30:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 112. [2024-12-02 12:30:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 0 states have call successors, (0), 0 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 12:30:15,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-12-02 12:30:15,861 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2024-12-02 12:30:15,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:30:15,861 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-12-02 12:30:15,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 3.7093023255813953) internal successors, (319), 87 states have internal predecessors, (319), 0 states have call successors, (0), 0 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 12:30:15,861 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-12-02 12:30:15,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-12-02 12:30:15,862 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:30:15,862 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:30:15,870 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-12-02 12:30:16,062 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-12-02 12:30:16,062 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:30:16,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:30:16,063 INFO L85 PathProgramCache]: Analyzing trace with hash 1044235595, now seen corresponding path program 23 times [2024-12-02 12:30:16,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:30:16,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261660680] [2024-12-02 12:30:16,063 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:30:16,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:30:16,114 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-12-02 12:30:16,114 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:17,356 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 338 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:17,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:30:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261660680] [2024-12-02 12:30:17,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261660680] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:30:17,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353552552] [2024-12-02 12:30:17,356 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:30:17,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:17,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:30:17,358 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:30:17,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-12-02 12:30:20,274 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-12-02 12:30:20,274 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:20,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-12-02 12:30:20,284 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:30:20,779 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:30:21,505 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:21,505 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:30:21,581 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:30:21,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:30:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 614 backedges. 38 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:21,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353552552] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:30:21,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:30:21,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 65 [2024-12-02 12:30:21,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543697915] [2024-12-02 12:30:21,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:30:21,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-12-02 12:30:21,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:30:21,753 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-12-02 12:30:21,753 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=3931, Unknown=0, NotChecked=0, Total=4160 [2024-12-02 12:30:21,754 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:30:24,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:30:24,806 INFO L93 Difference]: Finished difference Result 173 states and 174 transitions. [2024-12-02 12:30:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-12-02 12:30:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2024-12-02 12:30:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:30:24,807 INFO L225 Difference]: With dead ends: 173 [2024-12-02 12:30:24,807 INFO L226 Difference]: Without dead ends: 119 [2024-12-02 12:30:24,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1915 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=686, Invalid=10444, Unknown=0, NotChecked=0, Total=11130 [2024-12-02 12:30:24,807 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 35 mSDsluCounter, 1242 mSDsCounter, 0 mSdLazyCounter, 3640 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 3675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:30:24,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1273 Invalid, 3675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3640 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 12:30:24,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-12-02 12:30:24,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-12-02 12:30:24,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 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 12:30:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2024-12-02 12:30:24,809 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 111 [2024-12-02 12:30:24,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:30:24,809 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2024-12-02 12:30:24,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.4153846153846152) internal successors, (222), 65 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:30:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2024-12-02 12:30:24,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-12-02 12:30:24,810 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:30:24,811 INFO L218 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:30:24,819 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-12-02 12:30:25,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-12-02 12:30:25,011 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:30:25,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:30:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -729934478, now seen corresponding path program 24 times [2024-12-02 12:30:25,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:30:25,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596202689] [2024-12-02 12:30:25,012 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:30:25,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:30:25,073 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 12:30:25,073 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:25,950 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 231 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:25,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:30:25,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596202689] [2024-12-02 12:30:25,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596202689] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:30:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105706752] [2024-12-02 12:30:25,951 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:30:25,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:25,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:30:25,952 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:30:25,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-12-02 12:30:33,637 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-12-02 12:30:33,637 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:33,651 INFO L256 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-12-02 12:30:33,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:30:33,692 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:30:33,695 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 12:30:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:37,384 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:30:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 663 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:40,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105706752] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:30:40,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:30:40,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33, 34] total 96 [2024-12-02 12:30:40,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209455067] [2024-12-02 12:30:40,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:30:40,576 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2024-12-02 12:30:40,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:30:40,577 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2024-12-02 12:30:40,577 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=8482, Unknown=0, NotChecked=0, Total=9312 [2024-12-02 12:30:40,577 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 97 states, 96 states have (on average 3.5729166666666665) internal successors, (343), 97 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 12:30:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:30:44,754 INFO L93 Difference]: Finished difference Result 129 states and 131 transitions. [2024-12-02 12:30:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-12-02 12:30:44,754 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 3.5729166666666665) internal successors, (343), 97 states have internal predecessors, (343), 0 states have call successors, (0), 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 115 [2024-12-02 12:30:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:30:44,755 INFO L225 Difference]: With dead ends: 129 [2024-12-02 12:30:44,755 INFO L226 Difference]: Without dead ends: 129 [2024-12-02 12:30:44,755 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3304 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1593, Invalid=14919, Unknown=0, NotChecked=0, Total=16512 [2024-12-02 12:30:44,756 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 1141 mSDsCounter, 0 mSdLazyCounter, 3509 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 3548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-12-02 12:30:44,756 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1173 Invalid, 3548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3509 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-12-02 12:30:44,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-12-02 12:30:44,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2024-12-02 12:30:44,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 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 12:30:44,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-12-02 12:30:44,758 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 115 [2024-12-02 12:30:44,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:30:44,758 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-12-02 12:30:44,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 3.5729166666666665) internal successors, (343), 97 states have internal predecessors, (343), 0 states have call successors, (0), 0 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 12:30:44,758 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-12-02 12:30:44,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2024-12-02 12:30:44,759 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:30:44,759 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:30:44,768 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-12-02 12:30:44,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-12-02 12:30:44,959 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:30:44,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:30:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1817259847, now seen corresponding path program 25 times [2024-12-02 12:30:44,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:30:44,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261293677] [2024-12-02 12:30:44,960 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:30:44,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:30:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:30:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 339 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:46,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:30:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261293677] [2024-12-02 12:30:46,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261293677] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:30:46,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953653277] [2024-12-02 12:30:46,343 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:30:46,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:46,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:30:46,344 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:30:46,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-12-02 12:30:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:30:46,552 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-12-02 12:30:46,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:30:47,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:30:47,821 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:47,821 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:30:47,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:30:47,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:30:48,050 INFO L134 CoverageAnalysis]: Checked inductivity of 717 backedges. 41 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:48,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953653277] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:30:48,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:30:48,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2024-12-02 12:30:48,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973068194] [2024-12-02 12:30:48,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:30:48,051 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-12-02 12:30:48,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:30:48,051 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-12-02 12:30:48,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=4320, Unknown=0, NotChecked=0, Total=4556 [2024-12-02 12:30:48,052 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 68 states, 68 states have (on average 3.5) internal successors, (238), 68 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 12:30:51,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:30:51,591 INFO L93 Difference]: Finished difference Result 185 states and 186 transitions. [2024-12-02 12:30:51,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-12-02 12:30:51,592 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.5) internal successors, (238), 68 states have internal predecessors, (238), 0 states have call successors, (0), 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 119 [2024-12-02 12:30:51,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:30:51,593 INFO L225 Difference]: With dead ends: 185 [2024-12-02 12:30:51,593 INFO L226 Difference]: Without dead ends: 127 [2024-12-02 12:30:51,593 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=727, Invalid=11483, Unknown=0, NotChecked=0, Total=12210 [2024-12-02 12:30:51,593 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 37 mSDsluCounter, 1344 mSDsCounter, 0 mSdLazyCounter, 3937 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 3976 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 3937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:30:51,594 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1377 Invalid, 3976 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 3937 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-12-02 12:30:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-12-02 12:30:51,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2024-12-02 12:30:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:30:51,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2024-12-02 12:30:51,595 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2024-12-02 12:30:51,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:30:51,596 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2024-12-02 12:30:51,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.5) internal successors, (238), 68 states have internal predecessors, (238), 0 states have call successors, (0), 0 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 12:30:51,596 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2024-12-02 12:30:51,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-12-02 12:30:51,596 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:30:51,596 INFO L218 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:30:51,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-12-02 12:30:51,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:51,797 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:30:51,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:30:51,797 INFO L85 PathProgramCache]: Analyzing trace with hash -485750304, now seen corresponding path program 26 times [2024-12-02 12:30:51,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:30:51,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041168278] [2024-12-02 12:30:51,797 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:30:51,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:30:51,828 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:30:51,828 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:53,222 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 276 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:53,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:30:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041168278] [2024-12-02 12:30:53,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041168278] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:30:53,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783692261] [2024-12-02 12:30:53,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:30:53,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:30:53,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:30:53,224 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:30:53,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-12-02 12:30:53,460 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:30:53,460 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:30:53,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-12-02 12:30:53,467 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:30:53,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:30:53,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:30:53,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 12:30:56,424 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:56,424 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:30:59,260 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:30:59,344 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:30:59,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783692261] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:30:59,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:30:59,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 35] total 100 [2024-12-02 12:30:59,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620502105] [2024-12-02 12:30:59,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:30:59,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-12-02 12:30:59,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:30:59,345 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-12-02 12:30:59,345 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=871, Invalid=9229, Unknown=0, NotChecked=0, Total=10100 [2024-12-02 12:30:59,345 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 101 states, 100 states have (on average 3.67) internal successors, (367), 101 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 12:31:02,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:31:02,030 INFO L93 Difference]: Finished difference Result 137 states and 139 transitions. [2024-12-02 12:31:02,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-12-02 12:31:02,030 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 3.67) internal successors, (367), 101 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2024-12-02 12:31:02,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:31:02,031 INFO L225 Difference]: With dead ends: 137 [2024-12-02 12:31:02,031 INFO L226 Difference]: Without dead ends: 137 [2024-12-02 12:31:02,031 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3873 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1167, Invalid=12173, Unknown=0, NotChecked=0, Total=13340 [2024-12-02 12:31:02,032 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 57 mSDsluCounter, 1287 mSDsCounter, 0 mSdLazyCounter, 3967 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 1321 SdHoareTripleChecker+Invalid, 3983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-12-02 12:31:02,032 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 1321 Invalid, 3983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3967 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-12-02 12:31:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-12-02 12:31:02,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2024-12-02 12:31:02,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 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 12:31:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2024-12-02 12:31:02,035 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 123 [2024-12-02 12:31:02,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:31:02,035 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2024-12-02 12:31:02,035 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 3.67) internal successors, (367), 101 states have internal predecessors, (367), 0 states have call successors, (0), 0 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 12:31:02,035 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2024-12-02 12:31:02,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-12-02 12:31:02,035 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:31:02,035 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:31:02,046 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-12-02 12:31:02,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-12-02 12:31:02,236 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:31:02,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:31:02,236 INFO L85 PathProgramCache]: Analyzing trace with hash 137420327, now seen corresponding path program 27 times [2024-12-02 12:31:02,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:31:02,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99576745] [2024-12-02 12:31:02,236 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:31:02,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:31:02,297 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-12-02 12:31:02,298 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:31:03,756 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 435 proven. 393 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:03,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:31:03,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99576745] [2024-12-02 12:31:03,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99576745] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:31:03,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518973484] [2024-12-02 12:31:03,756 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:31:03,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:31:03,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:31:03,758 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:31:03,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-12-02 12:31:19,264 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-12-02 12:31:19,264 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:31:19,280 INFO L256 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-12-02 12:31:19,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:31:19,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:31:20,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 12:31:20,690 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:20,690 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:31:20,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:31:20,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:31:20,969 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 44 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:20,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518973484] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:31:20,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:31:20,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 73 [2024-12-02 12:31:20,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812625864] [2024-12-02 12:31:20,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:31:20,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-12-02 12:31:20,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:31:20,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-12-02 12:31:20,971 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=4981, Unknown=0, NotChecked=0, Total=5256 [2024-12-02 12:31:20,971 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 73 states, 73 states have (on average 3.4794520547945207) internal successors, (254), 73 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:31:24,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:31:24,790 INFO L93 Difference]: Finished difference Result 197 states and 198 transitions. [2024-12-02 12:31:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-12-02 12:31:24,791 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.4794520547945207) internal successors, (254), 73 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2024-12-02 12:31:24,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:31:24,791 INFO L225 Difference]: With dead ends: 197 [2024-12-02 12:31:24,791 INFO L226 Difference]: Without dead ends: 135 [2024-12-02 12:31:24,792 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2511 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=859, Invalid=13421, Unknown=0, NotChecked=0, Total=14280 [2024-12-02 12:31:24,792 INFO L435 NwaCegarLoop]: 35 mSDtfsCounter, 83 mSDsluCounter, 1568 mSDsCounter, 0 mSdLazyCounter, 4572 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 4626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 4572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 12:31:24,792 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 1603 Invalid, 4626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 4572 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 12:31:24,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-12-02 12:31:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2024-12-02 12:31:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 0 states have call successors, (0), 0 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 12:31:24,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2024-12-02 12:31:24,794 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 127 [2024-12-02 12:31:24,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:31:24,794 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2024-12-02 12:31:24,794 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.4794520547945207) internal successors, (254), 73 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:31:24,794 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2024-12-02 12:31:24,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-12-02 12:31:24,795 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:31:24,795 INFO L218 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:31:24,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-12-02 12:31:24,995 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-12-02 12:31:24,995 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:31:24,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:31:24,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2108817486, now seen corresponding path program 28 times [2024-12-02 12:31:24,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:31:24,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242081653] [2024-12-02 12:31:24,996 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:31:24,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:31:25,054 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:31:25,054 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:31:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 378 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:26,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:31:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242081653] [2024-12-02 12:31:26,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242081653] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:31:26,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478054514] [2024-12-02 12:31:26,640 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:31:26,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:31:26,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:31:26,641 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:31:26,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-12-02 12:31:28,394 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:31:28,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:31:28,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 188 conjuncts are in the unsatisfiable core [2024-12-02 12:31:28,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:31:28,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 12:31:28,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:31:28,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:31:28,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 12:31:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:32,227 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:31:35,682 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:31:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 885 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:35,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478054514] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:31:35,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:31:35,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 37] total 107 [2024-12-02 12:31:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053888481] [2024-12-02 12:31:35,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:31:35,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2024-12-02 12:31:35,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:31:35,792 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2024-12-02 12:31:35,792 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=830, Invalid=10726, Unknown=0, NotChecked=0, Total=11556 [2024-12-02 12:31:35,793 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 108 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 108 states have internal predecessors, (391), 0 states have call successors, (0), 0 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 12:31:40,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:31:40,806 INFO L93 Difference]: Finished difference Result 146 states and 148 transitions. [2024-12-02 12:31:40,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-12-02 12:31:40,806 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 108 states have internal predecessors, (391), 0 states have call successors, (0), 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 131 [2024-12-02 12:31:40,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:31:40,807 INFO L225 Difference]: With dead ends: 146 [2024-12-02 12:31:40,807 INFO L226 Difference]: Without dead ends: 146 [2024-12-02 12:31:40,807 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 190 SyntacticMatches, 1 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4342 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1619, Invalid=18687, Unknown=0, NotChecked=0, Total=20306 [2024-12-02 12:31:40,808 INFO L435 NwaCegarLoop]: 36 mSDtfsCounter, 54 mSDsluCounter, 1854 mSDsCounter, 0 mSdLazyCounter, 5591 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 5608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:31:40,808 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 1890 Invalid, 5608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5591 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-12-02 12:31:40,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-12-02 12:31:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 136. [2024-12-02 12:31:40,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:31:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2024-12-02 12:31:40,810 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2024-12-02 12:31:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:31:40,810 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2024-12-02 12:31:40,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 3.6542056074766354) internal successors, (391), 108 states have internal predecessors, (391), 0 states have call successors, (0), 0 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 12:31:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2024-12-02 12:31:40,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-12-02 12:31:40,811 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:31:40,811 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:31:40,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-12-02 12:31:41,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-12-02 12:31:41,011 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:31:41,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:31:41,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1492774293, now seen corresponding path program 29 times [2024-12-02 12:31:41,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:31:41,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711592079] [2024-12-02 12:31:41,012 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:31:41,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:31:41,079 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 12:31:41,079 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:31:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 496 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:42,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:31:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711592079] [2024-12-02 12:31:42,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711592079] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:31:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843990654] [2024-12-02 12:31:42,742 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:31:42,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:31:42,742 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:31:42,743 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:31:42,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-12-02 12:31:52,250 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2024-12-02 12:31:52,250 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:31:52,262 INFO L256 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-12-02 12:31:52,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:31:53,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:31:53,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 12:31:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 47 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:53,960 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:31:54,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:31:54,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:31:54,235 INFO L134 CoverageAnalysis]: Checked inductivity of 947 backedges. 47 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:31:54,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843990654] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:31:54,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:31:54,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 77 [2024-12-02 12:31:54,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564362084] [2024-12-02 12:31:54,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:31:54,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-12-02 12:31:54,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:31:54,237 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-12-02 12:31:54,237 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=5554, Unknown=0, NotChecked=0, Total=5852 [2024-12-02 12:31:54,238 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 77 states, 77 states have (on average 3.5064935064935066) internal successors, (270), 77 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:31:58,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:31:58,752 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2024-12-02 12:31:58,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-12-02 12:31:58,752 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.5064935064935066) internal successors, (270), 77 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2024-12-02 12:31:58,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:31:58,753 INFO L225 Difference]: With dead ends: 209 [2024-12-02 12:31:58,753 INFO L226 Difference]: Without dead ends: 143 [2024-12-02 12:31:58,753 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=949, Invalid=15307, Unknown=0, NotChecked=0, Total=16256 [2024-12-02 12:31:58,754 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 85 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 5432 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 5491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 5432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:31:58,754 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 1884 Invalid, 5491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 5432 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-12-02 12:31:58,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-12-02 12:31:58,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2024-12-02 12:31:58,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 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 12:31:58,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2024-12-02 12:31:58,756 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 135 [2024-12-02 12:31:58,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:31:58,756 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2024-12-02 12:31:58,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.5064935064935066) internal successors, (270), 77 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:31:58,756 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2024-12-02 12:31:58,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-12-02 12:31:58,756 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:31:58,756 INFO L218 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:31:58,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-12-02 12:31:58,957 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-12-02 12:31:58,957 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:31:58,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:31:58,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1789262012, now seen corresponding path program 30 times [2024-12-02 12:31:58,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:31:58,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958241805] [2024-12-02 12:31:58,957 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:31:58,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:31:59,026 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-12-02 12:31:59,027 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:32:00,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 378 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:32:00,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:32:00,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958241805] [2024-12-02 12:32:00,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958241805] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:32:00,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72933194] [2024-12-02 12:32:00,193 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:32:00,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:32:00,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:32:00,195 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:32:00,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-12-02 12:32:41,411 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2024-12-02 12:32:41,411 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:32:41,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 200 conjuncts are in the unsatisfiable core [2024-12-02 12:32:41,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:32:41,486 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 12:32:41,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:32:46,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:32:46,371 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:32:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 1008 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:32:50,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72933194] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:32:50,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:32:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 40, 40] total 115 [2024-12-02 12:32:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970445361] [2024-12-02 12:32:50,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:32:50,867 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-12-02 12:32:50,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:32:50,868 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-12-02 12:32:50,868 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1156, Invalid=12184, Unknown=0, NotChecked=0, Total=13340 [2024-12-02 12:32:50,868 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 116 states, 115 states have (on average 3.608695652173913) internal successors, (415), 116 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 12:32:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:32:56,569 INFO L93 Difference]: Finished difference Result 153 states and 155 transitions. [2024-12-02 12:32:56,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-12-02 12:32:56,570 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 3.608695652173913) internal successors, (415), 116 states have internal predecessors, (415), 0 states have call successors, (0), 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 139 [2024-12-02 12:32:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:32:56,571 INFO L225 Difference]: With dead ends: 153 [2024-12-02 12:32:56,571 INFO L226 Difference]: Without dead ends: 153 [2024-12-02 12:32:56,572 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4840 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2205, Invalid=21357, Unknown=0, NotChecked=0, Total=23562 [2024-12-02 12:32:56,572 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 135 mSDsluCounter, 1505 mSDsCounter, 0 mSdLazyCounter, 4673 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 1543 SdHoareTripleChecker+Invalid, 4723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 4673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 12:32:56,572 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 1543 Invalid, 4723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 4673 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-12-02 12:32:56,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-12-02 12:32:56,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 144. [2024-12-02 12:32:56,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 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 12:32:56,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2024-12-02 12:32:56,574 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 139 [2024-12-02 12:32:56,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:32:56,574 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2024-12-02 12:32:56,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 3.608695652173913) internal successors, (415), 116 states have internal predecessors, (415), 0 states have call successors, (0), 0 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 12:32:56,574 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2024-12-02 12:32:56,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2024-12-02 12:32:56,575 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:32:56,575 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:32:56,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-12-02 12:32:56,775 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2024-12-02 12:32:56,776 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:32:56,776 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:32:56,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1094713091, now seen corresponding path program 31 times [2024-12-02 12:32:56,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:32:56,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44707837] [2024-12-02 12:32:56,776 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:32:56,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:32:56,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:32:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 513 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:32:58,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:32:58,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44707837] [2024-12-02 12:32:58,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44707837] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:32:58,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955348146] [2024-12-02 12:32:58,584 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:32:58,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:32:58,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:32:58,585 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:32:58,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-12-02 12:32:58,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:32:58,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-12-02 12:32:58,874 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:32:59,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:33:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 50 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:00,632 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:33:00,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:33:00,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:33:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 50 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:00,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955348146] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:33:00,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:33:00,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2024-12-02 12:33:00,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726747770] [2024-12-02 12:33:00,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:33:00,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-12-02 12:33:00,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:33:00,897 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-12-02 12:33:00,897 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=6015, Unknown=0, NotChecked=0, Total=6320 [2024-12-02 12:33:00,897 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 80 states, 80 states have (on average 3.575) internal successors, (286), 80 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 12:33:06,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:33:06,424 INFO L93 Difference]: Finished difference Result 221 states and 222 transitions. [2024-12-02 12:33:06,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-12-02 12:33:06,425 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.575) internal successors, (286), 80 states have internal predecessors, (286), 0 states have call successors, (0), 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 143 [2024-12-02 12:33:06,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:33:06,425 INFO L225 Difference]: With dead ends: 221 [2024-12-02 12:33:06,425 INFO L226 Difference]: Without dead ends: 151 [2024-12-02 12:33:06,426 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2997 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=976, Invalid=16316, Unknown=0, NotChecked=0, Total=17292 [2024-12-02 12:33:06,426 INFO L435 NwaCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 2077 mSDsCounter, 0 mSdLazyCounter, 6128 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2116 SdHoareTripleChecker+Invalid, 6174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:33:06,426 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2116 Invalid, 6174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6128 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-12-02 12:33:06,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-12-02 12:33:06,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 148. [2024-12-02 12:33:06,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:33:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2024-12-02 12:33:06,428 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2024-12-02 12:33:06,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:33:06,428 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2024-12-02 12:33:06,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.575) internal successors, (286), 80 states have internal predecessors, (286), 0 states have call successors, (0), 0 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 12:33:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2024-12-02 12:33:06,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-12-02 12:33:06,429 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:33:06,429 INFO L218 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:33:06,440 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-12-02 12:33:06,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-12-02 12:33:06,629 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:33:06,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:33:06,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1847456554, now seen corresponding path program 32 times [2024-12-02 12:33:06,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:33:06,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269103663] [2024-12-02 12:33:06,630 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:33:06,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:33:06,662 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:33:06,663 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:33:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 435 proven. 704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:08,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:33:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269103663] [2024-12-02 12:33:08,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269103663] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:33:08,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558110531] [2024-12-02 12:33:08,327 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:33:08,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:33:08,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:33:08,329 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:33:08,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-12-02 12:33:08,600 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:33:08,601 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:33:08,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 176 conjuncts are in the unsatisfiable core [2024-12-02 12:33:08,609 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:33:08,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 12:33:08,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:33:12,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:12,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:33:16,405 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:33:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 1139 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:16,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558110531] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:33:16,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:33:16,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40, 41] total 118 [2024-12-02 12:33:16,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832468909] [2024-12-02 12:33:16,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:33:16,512 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2024-12-02 12:33:16,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:33:16,512 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2024-12-02 12:33:16,513 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1291, Invalid=12751, Unknown=0, NotChecked=0, Total=14042 [2024-12-02 12:33:16,513 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 119 states, 118 states have (on average 3.7203389830508473) internal successors, (439), 119 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 12:33:19,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:33:19,965 INFO L93 Difference]: Finished difference Result 161 states and 163 transitions. [2024-12-02 12:33:19,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-12-02 12:33:19,966 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 3.7203389830508473) internal successors, (439), 119 states have internal predecessors, (439), 0 states have call successors, (0), 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 147 [2024-12-02 12:33:19,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:33:19,967 INFO L225 Difference]: With dead ends: 161 [2024-12-02 12:33:19,967 INFO L226 Difference]: Without dead ends: 161 [2024-12-02 12:33:19,967 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5673 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1696, Invalid=16936, Unknown=0, NotChecked=0, Total=18632 [2024-12-02 12:33:19,967 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 53 mSDsluCounter, 1886 mSDsCounter, 0 mSdLazyCounter, 5707 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 1926 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 5707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:33:19,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 1926 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 5707 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-12-02 12:33:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-12-02 12:33:19,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 152. [2024-12-02 12:33:19,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 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 12:33:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2024-12-02 12:33:19,969 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 147 [2024-12-02 12:33:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:33:19,969 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2024-12-02 12:33:19,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 3.7203389830508473) internal successors, (439), 119 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 12:33:19,970 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2024-12-02 12:33:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2024-12-02 12:33:19,970 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:33:19,970 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:33:19,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-12-02 12:33:20,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2024-12-02 12:33:20,171 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:33:20,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:33:20,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2050560625, now seen corresponding path program 33 times [2024-12-02 12:33:20,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:33:20,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319147175] [2024-12-02 12:33:20,171 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:33:20,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:33:20,244 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-12-02 12:33:20,244 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:33:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 579 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:22,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:33:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319147175] [2024-12-02 12:33:22,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319147175] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:33:22,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540815638] [2024-12-02 12:33:22,281 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:33:22,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:33:22,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:33:22,283 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:33:22,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-12-02 12:33:27,186 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2024-12-02 12:33:27,186 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:33:27,195 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 169 conjuncts are in the unsatisfiable core [2024-12-02 12:33:27,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:33:28,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:33:29,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 12:33:29,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 53 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:29,695 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:33:31,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:33:31,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:33:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1209 backedges. 53 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:32,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540815638] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:33:32,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:33:32,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 121 [2024-12-02 12:33:32,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647552903] [2024-12-02 12:33:32,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:33:32,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-12-02 12:33:32,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:33:32,508 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-12-02 12:33:32,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=14077, Unknown=0, NotChecked=0, Total=14520 [2024-12-02 12:33:32,508 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 121 states, 121 states have (on average 3.628099173553719) internal successors, (439), 121 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 12:33:40,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:33:40,154 INFO L93 Difference]: Finished difference Result 233 states and 234 transitions. [2024-12-02 12:33:40,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-12-02 12:33:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 3.628099173553719) internal successors, (439), 121 states have internal predecessors, (439), 0 states have call successors, (0), 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 151 [2024-12-02 12:33:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:33:40,155 INFO L225 Difference]: With dead ends: 233 [2024-12-02 12:33:40,155 INFO L226 Difference]: Without dead ends: 159 [2024-12-02 12:33:40,155 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4878 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1238, Invalid=29914, Unknown=0, NotChecked=0, Total=31152 [2024-12-02 12:33:40,156 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 2832 mSDsCounter, 0 mSdLazyCounter, 8206 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 2874 SdHoareTripleChecker+Invalid, 8256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 8206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-12-02 12:33:40,156 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 2874 Invalid, 8256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 8206 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2024-12-02 12:33:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-12-02 12:33:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2024-12-02 12:33:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 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 12:33:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2024-12-02 12:33:40,157 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2024-12-02 12:33:40,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:33:40,157 INFO L471 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2024-12-02 12:33:40,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 3.628099173553719) internal successors, (439), 121 states have internal predecessors, (439), 0 states have call successors, (0), 0 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 12:33:40,157 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2024-12-02 12:33:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2024-12-02 12:33:40,158 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:33:40,158 INFO L218 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:33:40,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2024-12-02 12:33:40,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:33:40,358 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:33:40,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:33:40,359 INFO L85 PathProgramCache]: Analyzing trace with hash 1246752664, now seen corresponding path program 34 times [2024-12-02 12:33:40,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:33:40,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180048037] [2024-12-02 12:33:40,359 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:33:40,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:33:40,412 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:33:40,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:33:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 561 proven. 717 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:42,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:33:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180048037] [2024-12-02 12:33:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180048037] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:33:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243552446] [2024-12-02 12:33:42,522 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:33:42,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:33:42,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:33:42,524 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:33:42,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-12-02 12:33:45,759 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:33:45,759 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:33:45,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 194 conjuncts are in the unsatisfiable core [2024-12-02 12:33:45,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:33:45,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:33:45,828 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 12:33:45,839 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 12:33:50,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:50,406 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:33:55,029 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:33:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 1278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:33:55,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243552446] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:33:55,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:33:55,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 43] total 126 [2024-12-02 12:33:55,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338229382] [2024-12-02 12:33:55,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:33:55,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2024-12-02 12:33:55,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:33:55,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2024-12-02 12:33:55,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=901, Invalid=15101, Unknown=0, NotChecked=0, Total=16002 [2024-12-02 12:33:55,141 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 127 states, 126 states have (on average 3.6746031746031744) internal successors, (463), 127 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 12:34:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:34:01,755 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2024-12-02 12:34:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-12-02 12:34:01,755 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 3.6746031746031744) internal successors, (463), 127 states have internal predecessors, (463), 0 states have call successors, (0), 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 155 [2024-12-02 12:34:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:34:01,756 INFO L225 Difference]: With dead ends: 170 [2024-12-02 12:34:01,756 INFO L226 Difference]: Without dead ends: 170 [2024-12-02 12:34:01,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5842 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=1946, Invalid=26110, Unknown=0, NotChecked=0, Total=28056 [2024-12-02 12:34:01,757 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 65 mSDsluCounter, 2687 mSDsCounter, 0 mSdLazyCounter, 8110 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2729 SdHoareTripleChecker+Invalid, 8135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 8110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:34:01,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 2729 Invalid, 8135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 8110 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-12-02 12:34:01,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-12-02 12:34:01,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 160. [2024-12-02 12:34:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:34:01,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2024-12-02 12:34:01,758 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2024-12-02 12:34:01,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:34:01,758 INFO L471 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2024-12-02 12:34:01,759 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 3.6746031746031744) internal successors, (463), 127 states have internal predecessors, (463), 0 states have call successors, (0), 0 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 12:34:01,759 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2024-12-02 12:34:01,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-12-02 12:34:01,759 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:34:01,759 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:34:01,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-12-02 12:34:01,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:34:01,960 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:34:01,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:34:01,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1155848225, now seen corresponding path program 35 times [2024-12-02 12:34:01,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:34:01,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204611791] [2024-12-02 12:34:01,960 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:34:01,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:34:02,033 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-12-02 12:34:02,033 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:34:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 703 proven. 649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:34:03,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:34:03,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204611791] [2024-12-02 12:34:03,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204611791] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:34:03,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460845581] [2024-12-02 12:34:03,940 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:34:03,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:34:03,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:34:03,941 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:34:03,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-12-02 12:34:09,467 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2024-12-02 12:34:09,467 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:34:09,477 INFO L256 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-12-02 12:34:09,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:34:10,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:34:11,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 56 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:34:11,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:34:11,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:34:11,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:34:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1352 backedges. 56 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:34:11,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460845581] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:34:11,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:34:11,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 89 [2024-12-02 12:34:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457668346] [2024-12-02 12:34:11,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:34:11,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2024-12-02 12:34:11,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:34:11,820 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2024-12-02 12:34:11,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=7456, Unknown=0, NotChecked=0, Total=7832 [2024-12-02 12:34:11,821 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 89 states, 89 states have (on average 3.5730337078651684) internal successors, (318), 89 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 12:34:18,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:34:18,117 INFO L93 Difference]: Finished difference Result 245 states and 246 transitions. [2024-12-02 12:34:18,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-12-02 12:34:18,117 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.5730337078651684) internal successors, (318), 89 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 159 [2024-12-02 12:34:18,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:34:18,118 INFO L225 Difference]: With dead ends: 245 [2024-12-02 12:34:18,118 INFO L226 Difference]: Without dead ends: 167 [2024-12-02 12:34:18,118 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3888 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1231, Invalid=20821, Unknown=0, NotChecked=0, Total=22052 [2024-12-02 12:34:18,119 INFO L435 NwaCegarLoop]: 43 mSDtfsCounter, 100 mSDsluCounter, 2398 mSDsCounter, 0 mSdLazyCounter, 7102 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 2441 SdHoareTripleChecker+Invalid, 7173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 7102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-12-02 12:34:18,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 2441 Invalid, 7173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 7102 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-12-02 12:34:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-12-02 12:34:18,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 164. [2024-12-02 12:34:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 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 12:34:18,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2024-12-02 12:34:18,120 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 159 [2024-12-02 12:34:18,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:34:18,121 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2024-12-02 12:34:18,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.5730337078651684) internal successors, (318), 89 states have internal predecessors, (318), 0 states have call successors, (0), 0 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 12:34:18,121 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2024-12-02 12:34:18,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2024-12-02 12:34:18,121 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:34:18,121 INFO L218 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:34:18,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-12-02 12:34:18,322 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:34:18,322 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:34:18,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:34:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash -1083052538, now seen corresponding path program 36 times [2024-12-02 12:34:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:34:18,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677276807] [2024-12-02 12:34:18,322 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:34:18,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:34:18,419 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2024-12-02 12:34:18,419 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:34:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 561 proven. 864 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:34:19,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:34:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677276807] [2024-12-02 12:34:19,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677276807] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:34:19,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743334240] [2024-12-02 12:34:19,929 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:34:19,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:34:19,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:34:19,930 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:34:19,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-12-02 12:35:37,628 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2024-12-02 12:35:37,628 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:35:37,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 766 conjuncts, 183 conjuncts are in the unsatisfiable core [2024-12-02 12:35:37,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:35:37,716 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 12:35:37,724 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:35:41,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 630 proven. 795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:35:41,252 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:35:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 703 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:35:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743334240] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:35:45,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:35:45,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 129 [2024-12-02 12:35:45,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481647065] [2024-12-02 12:35:45,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:35:45,634 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-12-02 12:35:45,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:35:45,635 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-12-02 12:35:45,635 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1766, Invalid=15004, Unknown=0, NotChecked=0, Total=16770 [2024-12-02 12:35:45,635 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 130 states, 129 states have (on average 3.7751937984496124) internal successors, (487), 130 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 12:35:49,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:35:49,785 INFO L93 Difference]: Finished difference Result 170 states and 171 transitions. [2024-12-02 12:35:49,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-12-02 12:35:49,785 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 3.7751937984496124) internal successors, (487), 130 states have internal predecessors, (487), 0 states have call successors, (0), 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 163 [2024-12-02 12:35:49,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:35:49,786 INFO L225 Difference]: With dead ends: 170 [2024-12-02 12:35:49,786 INFO L226 Difference]: Without dead ends: 170 [2024-12-02 12:35:49,787 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7690 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=3384, Invalid=26028, Unknown=0, NotChecked=0, Total=29412 [2024-12-02 12:35:49,787 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 102 mSDsluCounter, 1359 mSDsCounter, 0 mSdLazyCounter, 4112 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 4170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 4112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-12-02 12:35:49,787 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 1403 Invalid, 4170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 4112 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-12-02 12:35:49,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-12-02 12:35:49,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 168. [2024-12-02 12:35:49,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 0 states have call successors, (0), 0 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 12:35:49,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2024-12-02 12:35:49,789 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 163 [2024-12-02 12:35:49,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:35:49,789 INFO L471 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2024-12-02 12:35:49,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 3.7751937984496124) internal successors, (487), 130 states have internal predecessors, (487), 0 states have call successors, (0), 0 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 12:35:49,789 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2024-12-02 12:35:49,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2024-12-02 12:35:49,789 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:35:49,789 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:35:49,816 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-12-02 12:35:49,990 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-12-02 12:35:49,990 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:35:49,990 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:35:49,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1189331123, now seen corresponding path program 37 times [2024-12-02 12:35:49,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:35:49,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298639963] [2024-12-02 12:35:49,990 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:35:49,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:35:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:35:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 723 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:35:52,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:35:52,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298639963] [2024-12-02 12:35:52,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298639963] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:35:52,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521996237] [2024-12-02 12:35:52,225 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-12-02 12:35:52,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:35:52,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:35:52,227 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:35:52,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-12-02 12:35:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:35:52,553 INFO L256 TraceCheckSpWp]: Trace formula consists of 789 conjuncts, 132 conjuncts are in the unsatisfiable core [2024-12-02 12:35:52,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:35:53,550 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:35:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 59 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:35:54,996 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:35:55,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:35:55,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:35:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1503 backedges. 59 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:35:55,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521996237] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:35:55,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:35:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 92 [2024-12-02 12:35:55,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235630932] [2024-12-02 12:35:55,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:35:55,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-12-02 12:35:55,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:35:55,331 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-12-02 12:35:55,331 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=7989, Unknown=0, NotChecked=0, Total=8372 [2024-12-02 12:35:55,331 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 92 states, 92 states have (on average 3.630434782608696) internal successors, (334), 92 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 12:36:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:36:02,454 INFO L93 Difference]: Finished difference Result 257 states and 258 transitions. [2024-12-02 12:36:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-12-02 12:36:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.630434782608696) internal successors, (334), 92 states have internal predecessors, (334), 0 states have call successors, (0), 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 167 [2024-12-02 12:36:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:36:02,455 INFO L225 Difference]: With dead ends: 257 [2024-12-02 12:36:02,455 INFO L226 Difference]: Without dead ends: 175 [2024-12-02 12:36:02,456 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 288 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4059 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1261, Invalid=21995, Unknown=0, NotChecked=0, Total=23256 [2024-12-02 12:36:02,456 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 46 mSDsluCounter, 2680 mSDsCounter, 0 mSdLazyCounter, 7941 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2725 SdHoareTripleChecker+Invalid, 7998 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 7941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:36:02,456 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2725 Invalid, 7998 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 7941 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 12:36:02,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2024-12-02 12:36:02,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2024-12-02 12:36:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:36:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2024-12-02 12:36:02,458 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2024-12-02 12:36:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:36:02,458 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2024-12-02 12:36:02,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.630434782608696) internal successors, (334), 92 states have internal predecessors, (334), 0 states have call successors, (0), 0 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 12:36:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2024-12-02 12:36:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2024-12-02 12:36:02,458 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:36:02,458 INFO L218 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:36:02,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-12-02 12:36:02,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-12-02 12:36:02,659 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:36:02,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:36:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1950749068, now seen corresponding path program 38 times [2024-12-02 12:36:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:36:02,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499888619] [2024-12-02 12:36:02,659 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:36:02,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:36:02,698 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:36:02,698 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:36:04,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 630 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:04,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:36:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499888619] [2024-12-02 12:36:04,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499888619] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:36:04,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395706319] [2024-12-02 12:36:04,706 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 12:36:04,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:36:04,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:36:04,708 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:36:04,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-12-02 12:36:04,999 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 12:36:04,999 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:36:05,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 214 conjuncts are in the unsatisfiable core [2024-12-02 12:36:05,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:36:05,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 12:36:05,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:36:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 703 proven. 877 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:10,021 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:36:14,393 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:36:14,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 780 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:14,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395706319] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:36:14,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:36:14,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 45] total 132 [2024-12-02 12:36:14,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267719251] [2024-12-02 12:36:14,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:36:14,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2024-12-02 12:36:14,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:36:14,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2024-12-02 12:36:14,515 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1979, Invalid=15577, Unknown=0, NotChecked=0, Total=17556 [2024-12-02 12:36:14,515 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 133 states, 132 states have (on average 3.871212121212121) internal successors, (511), 133 states have internal predecessors, (511), 0 states have call successors, (0), 0 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 12:36:16,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:36:16,701 INFO L93 Difference]: Finished difference Result 178 states and 179 transitions. [2024-12-02 12:36:16,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-12-02 12:36:16,701 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 3.871212121212121) internal successors, (511), 133 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2024-12-02 12:36:16,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:36:16,701 INFO L225 Difference]: With dead ends: 178 [2024-12-02 12:36:16,701 INFO L226 Difference]: Without dead ends: 178 [2024-12-02 12:36:16,702 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 253 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5929 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=2048, Invalid=16042, Unknown=0, NotChecked=0, Total=18090 [2024-12-02 12:36:16,702 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 8 mSDsluCounter, 1481 mSDsCounter, 0 mSdLazyCounter, 4474 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 1527 SdHoareTripleChecker+Invalid, 4475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-12-02 12:36:16,702 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 1527 Invalid, 4475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4474 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-12-02 12:36:16,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-12-02 12:36:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2024-12-02 12:36:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 0 states have call successors, (0), 0 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 12:36:16,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2024-12-02 12:36:16,704 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 171 [2024-12-02 12:36:16,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:36:16,704 INFO L471 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2024-12-02 12:36:16,704 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 3.871212121212121) internal successors, (511), 133 states have internal predecessors, (511), 0 states have call successors, (0), 0 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 12:36:16,704 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2024-12-02 12:36:16,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-12-02 12:36:16,704 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:36:16,704 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:36:16,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-12-02 12:36:16,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-12-02 12:36:16,905 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:36:16,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:36:16,905 INFO L85 PathProgramCache]: Analyzing trace with hash 661805243, now seen corresponding path program 39 times [2024-12-02 12:36:16,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:36:16,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401535656] [2024-12-02 12:36:16,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:36:16,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:36:17,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-12-02 12:36:17,013 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:36:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 801 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:19,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:36:19,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401535656] [2024-12-02 12:36:19,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401535656] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:36:19,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134859272] [2024-12-02 12:36:19,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 12:36:19,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:36:19,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:36:19,517 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:36:19,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-12-02 12:36:42,991 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-12-02 12:36:42,992 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:36:43,012 INFO L256 TraceCheckSpWp]: Trace formula consists of 825 conjuncts, 142 conjuncts are in the unsatisfiable core [2024-12-02 12:36:43,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:36:43,989 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:36:45,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 12:36:45,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 62 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:45,479 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:36:45,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:36:45,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:36:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1662 backedges. 62 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134859272] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:36:45,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:36:45,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2024-12-02 12:36:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150674668] [2024-12-02 12:36:45,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:36:45,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-12-02 12:36:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:36:45,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-12-02 12:36:45,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=8709, Unknown=0, NotChecked=0, Total=9120 [2024-12-02 12:36:45,819 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 96 states, 96 states have (on average 3.6458333333333335) internal successors, (350), 96 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 12:36:53,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:36:53,120 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2024-12-02 12:36:53,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-12-02 12:36:53,120 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 3.6458333333333335) internal successors, (350), 96 states have internal predecessors, (350), 0 states have call successors, (0), 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 175 [2024-12-02 12:36:53,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:36:53,121 INFO L225 Difference]: With dead ends: 269 [2024-12-02 12:36:53,121 INFO L226 Difference]: Without dead ends: 183 [2024-12-02 12:36:53,122 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4449 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1364, Invalid=24076, Unknown=0, NotChecked=0, Total=25440 [2024-12-02 12:36:53,122 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 51 mSDsluCounter, 2926 mSDsCounter, 0 mSdLazyCounter, 8629 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 2973 SdHoareTripleChecker+Invalid, 8687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 8629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 12:36:53,122 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 2973 Invalid, 8687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 8629 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 12:36:53,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2024-12-02 12:36:53,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2024-12-02 12:36:53,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 0 states have call successors, (0), 0 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 12:36:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2024-12-02 12:36:53,124 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 175 [2024-12-02 12:36:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:36:53,124 INFO L471 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2024-12-02 12:36:53,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 3.6458333333333335) internal successors, (350), 96 states have internal predecessors, (350), 0 states have call successors, (0), 0 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 12:36:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2024-12-02 12:36:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2024-12-02 12:36:53,125 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:36:53,125 INFO L218 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:36:53,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-12-02 12:36:53,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:36:53,325 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:36:53,326 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:36:53,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1801318626, now seen corresponding path program 40 times [2024-12-02 12:36:53,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:36:53,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765248209] [2024-12-02 12:36:53,326 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:36:53,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:36:53,608 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:36:53,608 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:36:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 780 proven. 963 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:36:55,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:36:55,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765248209] [2024-12-02 12:36:55,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765248209] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:36:55,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253511135] [2024-12-02 12:36:55,897 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-12-02 12:36:55,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:36:55,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:36:55,898 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:36:55,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-12-02 12:37:03,711 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-12-02 12:37:03,711 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:03,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 838 conjuncts, 211 conjuncts are in the unsatisfiable core [2024-12-02 12:37:03,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:37:03,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-12-02 12:37:03,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 1 [2024-12-02 12:37:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:37:09,924 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:37:14,756 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:37:14,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 1743 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:37:14,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253511135] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:37:14,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:37:14,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 49, 49] total 143 [2024-12-02 12:37:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687586025] [2024-12-02 12:37:14,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:37:14,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2024-12-02 12:37:14,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:37:14,881 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2024-12-02 12:37:14,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1665, Invalid=18927, Unknown=0, NotChecked=0, Total=20592 [2024-12-02 12:37:14,882 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 144 states, 143 states have (on average 3.7412587412587412) internal successors, (535), 144 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 12:37:20,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:37:20,595 INFO L93 Difference]: Finished difference Result 193 states and 195 transitions. [2024-12-02 12:37:20,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-12-02 12:37:20,596 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 3.7412587412587412) internal successors, (535), 144 states have internal predecessors, (535), 0 states have call successors, (0), 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 179 [2024-12-02 12:37:20,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:37:20,596 INFO L225 Difference]: With dead ends: 193 [2024-12-02 12:37:20,596 INFO L226 Difference]: Without dead ends: 193 [2024-12-02 12:37:20,597 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8173 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=2223, Invalid=24837, Unknown=0, NotChecked=0, Total=27060 [2024-12-02 12:37:20,597 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 58 mSDsluCounter, 3362 mSDsCounter, 0 mSdLazyCounter, 10121 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 3410 SdHoareTripleChecker+Invalid, 10141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 10121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2024-12-02 12:37:20,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 3410 Invalid, 10141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 10121 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2024-12-02 12:37:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-12-02 12:37:20,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 184. [2024-12-02 12:37:20,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 0 states have call successors, (0), 0 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 12:37:20,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2024-12-02 12:37:20,599 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2024-12-02 12:37:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:37:20,599 INFO L471 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2024-12-02 12:37:20,599 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 3.7412587412587412) internal successors, (535), 144 states have internal predecessors, (535), 0 states have call successors, (0), 0 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 12:37:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2024-12-02 12:37:20,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2024-12-02 12:37:20,599 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:37:20,599 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:37:20,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-12-02 12:37:20,800 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:20,800 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:37:20,800 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:37:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1219267543, now seen corresponding path program 41 times [2024-12-02 12:37:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:37:20,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644010522] [2024-12-02 12:37:20,800 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:37:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:37:20,893 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-12-02 12:37:20,893 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:37:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 946 proven. 883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:37:23,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:37:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644010522] [2024-12-02 12:37:23,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644010522] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:37:23,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586830513] [2024-12-02 12:37:23,293 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-12-02 12:37:23,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:37:23,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:37:23,294 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:37:23,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-12-02 12:38:22,855 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2024-12-02 12:38:22,855 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:22,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 144 conjuncts are in the unsatisfiable core [2024-12-02 12:38:22,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:38:23,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 12:38:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 65 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:38:25,648 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:38:25,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2024-12-02 12:38:25,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-12-02 12:38:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1829 backedges. 65 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:38:25,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586830513] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:38:25,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 12:38:25,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 101 [2024-12-02 12:38:25,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241728134] [2024-12-02 12:38:25,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 12:38:25,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2024-12-02 12:38:25,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 12:38:25,980 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2024-12-02 12:38:25,980 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=9637, Unknown=0, NotChecked=0, Total=10100 [2024-12-02 12:38:25,981 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 101 states, 101 states have (on average 3.623762376237624) internal successors, (366), 101 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 12:38:34,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:38:34,616 INFO L93 Difference]: Finished difference Result 281 states and 282 transitions. [2024-12-02 12:38:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-12-02 12:38:34,617 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.623762376237624) internal successors, (366), 101 states have internal predecessors, (366), 0 states have call successors, (0), 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 183 [2024-12-02 12:38:34,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:38:34,617 INFO L225 Difference]: With dead ends: 281 [2024-12-02 12:38:34,617 INFO L226 Difference]: Without dead ends: 191 [2024-12-02 12:38:34,618 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5088 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1549, Invalid=27181, Unknown=0, NotChecked=0, Total=28730 [2024-12-02 12:38:34,619 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 115 mSDsluCounter, 3250 mSDsCounter, 0 mSdLazyCounter, 9631 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 3299 SdHoareTripleChecker+Invalid, 9713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 9631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:38:34,619 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 3299 Invalid, 9713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 9631 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2024-12-02 12:38:34,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-12-02 12:38:34,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-12-02 12:38:34,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 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 12:38:34,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2024-12-02 12:38:34,621 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 183 [2024-12-02 12:38:34,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:38:34,622 INFO L471 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2024-12-02 12:38:34,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.623762376237624) internal successors, (366), 101 states have internal predecessors, (366), 0 states have call successors, (0), 0 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 12:38:34,622 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2024-12-02 12:38:34,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2024-12-02 12:38:34,622 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:38:34,623 INFO L218 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:38:34,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-12-02 12:38:34,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:34,823 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 6 more)] === [2024-12-02 12:38:34,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:38:34,823 INFO L85 PathProgramCache]: Analyzing trace with hash 412349776, now seen corresponding path program 42 times [2024-12-02 12:38:34,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 12:38:34,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273618644] [2024-12-02 12:38:34,824 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:38:34,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 12:38:34,947 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2024-12-02 12:38:34,948 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 12:38:36,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 780 proven. 1134 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:38:36,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 12:38:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273618644] [2024-12-02 12:38:36,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273618644] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 12:38:36,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703579012] [2024-12-02 12:38:36,849 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-12-02 12:38:36,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:38:36,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:38:36,850 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:38:36,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_35e494a2-ba1e-4c98-ae84-4909d841cbf6/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process