./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-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_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/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_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/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_45d280e4-f348-4f37-aeb5-c112843fd213/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 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:36:52,018 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:36:52,086 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 07:36:52,092 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:36:52,092 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:36:52,118 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:36:52,118 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:36:52,119 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:36:52,119 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:36:52,119 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:36:52,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:36:52,119 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:36:52,120 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:36:52,120 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:36:52,120 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:36:52,120 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:36:52,120 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:36:52,120 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:36:52,120 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:36:52,121 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:36:52,122 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:36:52,122 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:36:52,122 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:36:52,123 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:36:52,123 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:36:52,123 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_45d280e4-f348-4f37-aeb5-c112843fd213/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 -> 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e [2024-12-02 07:36:52,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:36:52,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:36:52,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:36:52,394 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:36:52,394 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:36:52,396 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2024-12-02 07:36:55,113 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/325b6cc97/8263db67da6f4e708db428a848dc7907/FLAGab5c36845 [2024-12-02 07:36:55,348 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:36:55,349 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2024-12-02 07:36:55,359 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/325b6cc97/8263db67da6f4e708db428a848dc7907/FLAGab5c36845 [2024-12-02 07:36:55,683 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/325b6cc97/8263db67da6f4e708db428a848dc7907 [2024-12-02 07:36:55,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:36:55,686 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:36:55,687 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:36:55,687 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:36:55,691 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:36:55,692 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:36:55" (1/1) ... [2024-12-02 07:36:55,693 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bba0b24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:55, skipping insertion in model container [2024-12-02 07:36:55,693 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:36:55" (1/1) ... [2024-12-02 07:36:55,726 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:36:55,957 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:36:55,967 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:36:56,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:36:56,033 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:36:56,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56 WrapperNode [2024-12-02 07:36:56,034 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:36:56,035 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:36:56,035 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:36:56,036 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:36:56,042 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,053 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,075 INFO L138 Inliner]: procedures = 119, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 120 [2024-12-02 07:36:56,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:36:56,076 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:36:56,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:36:56,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:36:56,085 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,085 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,088 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,103 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 15 writes are split as follows [0, 15]. [2024-12-02 07:36:56,103 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,104 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,110 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,111 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,116 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,118 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:36:56,118 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:36:56,119 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:36:56,119 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:36:56,119 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (1/1) ... [2024-12-02 07:36:56,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:36:56,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:36:56,148 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:36:56,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:36:56,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:36:56,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:36:56,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:36:56,280 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:36:56,282 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:36:56,698 INFO L? ?]: Removed 126 outVars from TransFormulas that were not future-live. [2024-12-02 07:36:56,698 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:36:56,713 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:36:56,714 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-12-02 07:36:56,714 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:36:56 BoogieIcfgContainer [2024-12-02 07:36:56,714 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:36:56,717 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:36:56,717 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:36:56,723 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:36:56,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:36:55" (1/3) ... [2024-12-02 07:36:56,724 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1282df31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:36:56, skipping insertion in model container [2024-12-02 07:36:56,724 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:56" (2/3) ... [2024-12-02 07:36:56,725 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1282df31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:36:56, skipping insertion in model container [2024-12-02 07:36:56,725 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:36:56" (3/3) ... [2024-12-02 07:36:56,726 INFO L128 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2024-12-02 07:36:56,743 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:36:56,745 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll-simple-white-blue-2.i that has 1 procedures, 130 locations, 1 initial locations, 6 loop locations, and 59 error locations. [2024-12-02 07:36:56,790 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:36:56,804 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;@6effe043, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:36:56,805 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-12-02 07:36:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 70 states have (on average 2.1) internal successors, (147), 129 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 07:36:56,815 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:56,816 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 07:36:56,817 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:56,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:56,822 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-12-02 07:36:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901139067] [2024-12-02 07:36:56,830 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:56,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:57,012 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 07:36:57,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:57,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901139067] [2024-12-02 07:36:57,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901139067] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:57,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:57,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:36:57,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071509456] [2024-12-02 07:36:57,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:57,019 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:57,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:57,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:57,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:57,043 INFO L87 Difference]: Start difference. First operand has 130 states, 70 states have (on average 2.1) internal successors, (147), 129 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:57,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:57,245 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2024-12-02 07:36:57,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:36:57,248 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-12-02 07:36:57,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:57,256 INFO L225 Difference]: With dead ends: 152 [2024-12-02 07:36:57,257 INFO L226 Difference]: Without dead ends: 150 [2024-12-02 07:36:57,259 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 07:36:57,262 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:57,263 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:36:57,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-12-02 07:36:57,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2024-12-02 07:36:57,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2024-12-02 07:36:57,304 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 3 [2024-12-02 07:36:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:57,304 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2024-12-02 07:36:57,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2024-12-02 07:36:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 07:36:57,305 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:57,305 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 07:36:57,305 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:36:57,305 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:57,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-12-02 07:36:57,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:57,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543823824] [2024-12-02 07:36:57,306 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:57,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:57,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:57,397 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 07:36:57,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:57,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543823824] [2024-12-02 07:36:57,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543823824] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:57,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:57,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:36:57,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598710142] [2024-12-02 07:36:57,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:57,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:36:57,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:57,399 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:36:57,400 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:36:57,400 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:57,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:57,563 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2024-12-02 07:36:57,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:36:57,563 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-12-02 07:36:57,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:57,564 INFO L225 Difference]: With dead ends: 147 [2024-12-02 07:36:57,565 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 07:36:57,565 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 07:36:57,566 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:57,566 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 126 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:36:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 07:36:57,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2024-12-02 07:36:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 119 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 07:36:57,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2024-12-02 07:36:57,576 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 3 [2024-12-02 07:36:57,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:57,576 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2024-12-02 07:36:57,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2024-12-02 07:36:57,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 07:36:57,577 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:57,577 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:57,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:36:57,577 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:57,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:57,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1115865774, now seen corresponding path program 1 times [2024-12-02 07:36:57,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:57,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884503363] [2024-12-02 07:36:57,578 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:57,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:57,784 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 07:36:57,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:57,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884503363] [2024-12-02 07:36:57,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884503363] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:57,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:57,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:36:57,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973032331] [2024-12-02 07:36:57,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:57,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:36:57,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:57,785 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:36:57,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:36:57,786 INFO L87 Difference]: Start difference. First operand 120 states and 127 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 07:36:58,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:58,022 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2024-12-02 07:36:58,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:58,023 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 07:36:58,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:58,024 INFO L225 Difference]: With dead ends: 117 [2024-12-02 07:36:58,024 INFO L226 Difference]: Without dead ends: 117 [2024-12-02 07:36:58,024 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 07:36:58,025 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 138 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:58,026 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 53 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:36:58,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-12-02 07:36:58,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2024-12-02 07:36:58,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 112 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 07:36:58,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2024-12-02 07:36:58,034 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 10 [2024-12-02 07:36:58,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:58,034 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2024-12-02 07:36:58,034 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 07:36:58,034 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2024-12-02 07:36:58,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 07:36:58,035 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:58,035 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:58,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:36:58,036 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:58,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:58,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1115865775, now seen corresponding path program 1 times [2024-12-02 07:36:58,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:58,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478918606] [2024-12-02 07:36:58,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:58,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:58,255 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 07:36:58,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:58,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478918606] [2024-12-02 07:36:58,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478918606] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:58,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:58,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:36:58,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984595880] [2024-12-02 07:36:58,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:58,256 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:36:58,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:58,256 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:36:58,256 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:36:58,257 INFO L87 Difference]: Start difference. First operand 113 states and 126 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 07:36:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:58,506 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2024-12-02 07:36:58,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:58,506 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 07:36:58,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:58,507 INFO L225 Difference]: With dead ends: 147 [2024-12-02 07:36:58,507 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 07:36:58,508 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:36:58,508 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 324 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:58,509 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 76 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:36:58,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 07:36:58,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2024-12-02 07:36:58,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 101 states have (on average 1.5148514851485149) internal successors, (153), 134 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 07:36:58,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2024-12-02 07:36:58,515 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 10 [2024-12-02 07:36:58,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:58,515 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2024-12-02 07:36:58,515 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 07:36:58,515 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2024-12-02 07:36:58,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 07:36:58,516 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:58,516 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:58,516 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 07:36:58,516 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:58,516 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:58,517 INFO L85 PathProgramCache]: Analyzing trace with hash -289600750, now seen corresponding path program 1 times [2024-12-02 07:36:58,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:58,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895786325] [2024-12-02 07:36:58,517 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:58,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:58,643 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 07:36:58,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:58,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895786325] [2024-12-02 07:36:58,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895786325] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:58,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:58,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:36:58,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9262053] [2024-12-02 07:36:58,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:58,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:36:58,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:58,644 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:36:58,644 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:36:58,644 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:58,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:58,815 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2024-12-02 07:36:58,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:58,815 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-12-02 07:36:58,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:58,816 INFO L225 Difference]: With dead ends: 134 [2024-12-02 07:36:58,816 INFO L226 Difference]: Without dead ends: 134 [2024-12-02 07:36:58,816 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:36:58,817 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 4 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:58,818 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 249 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:36:58,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-12-02 07:36:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-12-02 07:36:58,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 101 states have (on average 1.495049504950495) internal successors, (151), 133 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 07:36:58,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2024-12-02 07:36:58,825 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 13 [2024-12-02 07:36:58,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:58,825 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2024-12-02 07:36:58,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:58,825 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2024-12-02 07:36:58,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 07:36:58,825 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:58,826 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:58,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:36:58,826 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:58,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:58,826 INFO L85 PathProgramCache]: Analyzing trace with hash -289600749, now seen corresponding path program 1 times [2024-12-02 07:36:58,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:58,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928606301] [2024-12-02 07:36:58,827 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:58,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:58,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:59,039 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 07:36:59,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:59,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928606301] [2024-12-02 07:36:59,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928606301] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:59,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:59,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:36:59,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916626695] [2024-12-02 07:36:59,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:59,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:36:59,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:59,041 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:36:59,041 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:36:59,041 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:59,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:59,210 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2024-12-02 07:36:59,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:36:59,211 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-12-02 07:36:59,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:59,211 INFO L225 Difference]: With dead ends: 133 [2024-12-02 07:36:59,211 INFO L226 Difference]: Without dead ends: 133 [2024-12-02 07:36:59,212 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:36:59,212 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:59,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:36:59,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-12-02 07:36:59,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-12-02 07:36:59,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 101 states have (on average 1.4752475247524752) internal successors, (149), 132 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 07:36:59,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2024-12-02 07:36:59,218 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 13 [2024-12-02 07:36:59,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:59,218 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2024-12-02 07:36:59,219 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:59,219 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2024-12-02 07:36:59,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 07:36:59,219 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:59,219 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:59,219 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 07:36:59,220 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:59,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -465627308, now seen corresponding path program 1 times [2024-12-02 07:36:59,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:59,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248103993] [2024-12-02 07:36:59,220 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:59,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:36:59,472 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 07:36:59,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:36:59,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248103993] [2024-12-02 07:36:59,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248103993] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:36:59,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:36:59,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:36:59,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163688319] [2024-12-02 07:36:59,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:36:59,473 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:36:59,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:36:59,474 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:36:59,474 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:36:59,474 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:59,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:36:59,814 INFO L93 Difference]: Finished difference Result 134 states and 150 transitions. [2024-12-02 07:36:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 07:36:59,814 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 07:36:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:36:59,815 INFO L225 Difference]: With dead ends: 134 [2024-12-02 07:36:59,815 INFO L226 Difference]: Without dead ends: 134 [2024-12-02 07:36:59,815 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:36:59,816 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 130 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:36:59,816 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 172 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:36:59,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-12-02 07:36:59,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2024-12-02 07:36:59,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 101 states have (on average 1.4653465346534653) internal successors, (148), 131 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:59,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2024-12-02 07:36:59,821 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 17 [2024-12-02 07:36:59,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:36:59,822 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2024-12-02 07:36:59,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:36:59,822 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2024-12-02 07:36:59,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 07:36:59,822 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:36:59,823 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:36:59,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 07:36:59,823 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:36:59,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:36:59,823 INFO L85 PathProgramCache]: Analyzing trace with hash -465627307, now seen corresponding path program 1 times [2024-12-02 07:36:59,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:36:59,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694205574] [2024-12-02 07:36:59,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:36:59,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:36:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:00,164 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 07:37:00,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694205574] [2024-12-02 07:37:00,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694205574] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:00,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:00,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-12-02 07:37:00,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886126700] [2024-12-02 07:37:00,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:00,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 07:37:00,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:00,166 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 07:37:00,166 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:37:00,166 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:00,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:00,758 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2024-12-02 07:37:00,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:37:00,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 07:37:00,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:00,759 INFO L225 Difference]: With dead ends: 131 [2024-12-02 07:37:00,759 INFO L226 Difference]: Without dead ends: 131 [2024-12-02 07:37:00,760 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2024-12-02 07:37:00,760 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 138 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:00,761 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 253 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:37:00,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-12-02 07:37:00,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2024-12-02 07:37:00,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 117 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 07:37:00,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2024-12-02 07:37:00,765 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 17 [2024-12-02 07:37:00,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:00,765 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2024-12-02 07:37:00,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:00,766 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2024-12-02 07:37:00,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 07:37:00,766 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:00,766 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:00,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-12-02 07:37:00,767 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:00,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:00,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1402119814, now seen corresponding path program 1 times [2024-12-02 07:37:00,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:00,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512542993] [2024-12-02 07:37:00,767 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:00,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:00,948 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 07:37:00,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:00,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512542993] [2024-12-02 07:37:00,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512542993] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:00,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:00,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:37:00,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661061256] [2024-12-02 07:37:00,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:00,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:37:00,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:00,949 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:37:00,949 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:37:00,950 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:01,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:01,099 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2024-12-02 07:37:01,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:37:01,099 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 07:37:01,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:01,100 INFO L225 Difference]: With dead ends: 130 [2024-12-02 07:37:01,100 INFO L226 Difference]: Without dead ends: 130 [2024-12-02 07:37:01,100 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:37:01,101 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 22 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:01,101 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 273 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:37:01,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-12-02 07:37:01,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2024-12-02 07:37:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 123 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 07:37:01,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2024-12-02 07:37:01,105 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 17 [2024-12-02 07:37:01,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:01,105 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2024-12-02 07:37:01,105 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:01,105 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2024-12-02 07:37:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 07:37:01,105 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:01,105 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:01,106 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-12-02 07:37:01,106 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:01,106 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash 983250452, now seen corresponding path program 1 times [2024-12-02 07:37:01,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:01,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316607129] [2024-12-02 07:37:01,106 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316607129] [2024-12-02 07:37:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316607129] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200951857] [2024-12-02 07:37:01,370 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:01,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:01,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:01,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:01,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:37:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:01,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-12-02 07:37:01,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:01,511 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 07:37:01,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 25 treesize of output 13 [2024-12-02 07:37:01,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 29 treesize of output 13 [2024-12-02 07:37:01,580 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 07:37:01,580 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:37:01,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200951857] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:01,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:37:01,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2024-12-02 07:37:01,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823851403] [2024-12-02 07:37:01,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:01,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:37:01,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:01,582 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:37:01,582 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:37:01,582 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:01,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:01,737 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2024-12-02 07:37:01,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:37:01,737 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 07:37:01,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:01,738 INFO L225 Difference]: With dead ends: 149 [2024-12-02 07:37:01,738 INFO L226 Difference]: Without dead ends: 149 [2024-12-02 07:37:01,738 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:37:01,739 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 33 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:01,739 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 258 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:37:01,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-12-02 07:37:01,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 127. [2024-12-02 07:37:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4257425742574257) internal successors, (144), 126 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:01,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2024-12-02 07:37:01,743 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 20 [2024-12-02 07:37:01,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:01,743 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2024-12-02 07:37:01,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:01,744 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2024-12-02 07:37:01,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 07:37:01,744 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:01,744 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:01,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:37:01,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-12-02 07:37:01,945 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:01,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:01,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1365979663, now seen corresponding path program 1 times [2024-12-02 07:37:01,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:01,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143448756] [2024-12-02 07:37:01,945 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:01,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:02,059 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 07:37:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143448756] [2024-12-02 07:37:02,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143448756] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:02,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:02,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:37:02,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022863970] [2024-12-02 07:37:02,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:02,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:37:02,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:02,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:37:02,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:37:02,061 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:02,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:02,249 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2024-12-02 07:37:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:37:02,249 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 07:37:02,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:02,250 INFO L225 Difference]: With dead ends: 148 [2024-12-02 07:37:02,250 INFO L226 Difference]: Without dead ends: 148 [2024-12-02 07:37:02,250 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:37:02,251 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 12 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:02,251 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 364 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:37:02,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-12-02 07:37:02,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2024-12-02 07:37:02,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 114 states have (on average 1.412280701754386) internal successors, (161), 139 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 07:37:02,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2024-12-02 07:37:02,256 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 20 [2024-12-02 07:37:02,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:02,256 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2024-12-02 07:37:02,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2024-12-02 07:37:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 07:37:02,257 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:02,257 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:02,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 07:37:02,257 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:02,258 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:02,258 INFO L85 PathProgramCache]: Analyzing trace with hash 418056145, now seen corresponding path program 1 times [2024-12-02 07:37:02,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:02,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830339924] [2024-12-02 07:37:02,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:02,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:02,460 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 07:37:02,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:02,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830339924] [2024-12-02 07:37:02,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830339924] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:02,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:02,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:37:02,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806625365] [2024-12-02 07:37:02,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:02,461 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:37:02,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:02,461 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:37:02,461 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:37:02,462 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:02,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:02,762 INFO L93 Difference]: Finished difference Result 163 states and 188 transitions. [2024-12-02 07:37:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:37:02,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 07:37:02,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:02,764 INFO L225 Difference]: With dead ends: 163 [2024-12-02 07:37:02,764 INFO L226 Difference]: Without dead ends: 163 [2024-12-02 07:37:02,764 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-12-02 07:37:02,765 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 259 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:02,765 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 139 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:37:02,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-12-02 07:37:02,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 141. [2024-12-02 07:37:02,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 116 states have (on average 1.4051724137931034) internal successors, (163), 140 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 163 transitions. [2024-12-02 07:37:02,769 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 163 transitions. Word has length 21 [2024-12-02 07:37:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:02,770 INFO L471 AbstractCegarLoop]: Abstraction has 141 states and 163 transitions. [2024-12-02 07:37:02,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 163 transitions. [2024-12-02 07:37:02,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 07:37:02,770 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:02,770 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:02,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 07:37:02,771 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:02,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:02,771 INFO L85 PathProgramCache]: Analyzing trace with hash 418056146, now seen corresponding path program 1 times [2024-12-02 07:37:02,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:02,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993908395] [2024-12-02 07:37:02,771 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:02,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:02,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:03,140 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 07:37:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993908395] [2024-12-02 07:37:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993908395] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:03,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:37:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787407462] [2024-12-02 07:37:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:03,141 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:37:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:03,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:37:03,141 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:37:03,142 INFO L87 Difference]: Start difference. First operand 141 states and 163 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:03,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:03,634 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2024-12-02 07:37:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:37:03,634 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 07:37:03,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:03,636 INFO L225 Difference]: With dead ends: 181 [2024-12-02 07:37:03,636 INFO L226 Difference]: Without dead ends: 181 [2024-12-02 07:37:03,637 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-12-02 07:37:03,637 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 321 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:03,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 239 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:37:03,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-12-02 07:37:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 143. [2024-12-02 07:37:03,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.3983050847457628) internal successors, (165), 142 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 07:37:03,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2024-12-02 07:37:03,643 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 21 [2024-12-02 07:37:03,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:03,643 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2024-12-02 07:37:03,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:03,643 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2024-12-02 07:37:03,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 07:37:03,644 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:03,644 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:03,644 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 07:37:03,644 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:03,645 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:03,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1091240362, now seen corresponding path program 1 times [2024-12-02 07:37:03,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:03,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623993069] [2024-12-02 07:37:03,645 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:03,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:03,695 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 07:37:03,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:03,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623993069] [2024-12-02 07:37:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623993069] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:03,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:03,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:37:03,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521104616] [2024-12-02 07:37:03,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:03,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:37:03,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:03,696 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:37:03,697 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:37:03,697 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:03,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:03,807 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2024-12-02 07:37:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:37:03,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-12-02 07:37:03,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:03,808 INFO L225 Difference]: With dead ends: 161 [2024-12-02 07:37:03,808 INFO L226 Difference]: Without dead ends: 161 [2024-12-02 07:37:03,809 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:37:03,809 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 153 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:03,809 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 112 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:37:03,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-12-02 07:37:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 143. [2024-12-02 07:37:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 118 states have (on average 1.3898305084745763) internal successors, (164), 142 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:03,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 164 transitions. [2024-12-02 07:37:03,812 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 164 transitions. Word has length 24 [2024-12-02 07:37:03,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:03,812 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 164 transitions. [2024-12-02 07:37:03,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:03,812 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 164 transitions. [2024-12-02 07:37:03,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 07:37:03,813 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:03,813 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:03,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 07:37:03,813 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:03,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:03,814 INFO L85 PathProgramCache]: Analyzing trace with hash 432891767, now seen corresponding path program 1 times [2024-12-02 07:37:03,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:03,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068408568] [2024-12-02 07:37:03,814 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:03,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:04,196 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 07:37:04,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:04,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068408568] [2024-12-02 07:37:04,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068408568] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:04,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:04,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-12-02 07:37:04,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126563407] [2024-12-02 07:37:04,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:04,197 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 07:37:04,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:04,197 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 07:37:04,198 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:37:04,198 INFO L87 Difference]: Start difference. First operand 143 states and 164 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 07:37:04,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:04,661 INFO L93 Difference]: Finished difference Result 197 states and 221 transitions. [2024-12-02 07:37:04,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:37:04,661 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-12-02 07:37:04,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:04,663 INFO L225 Difference]: With dead ends: 197 [2024-12-02 07:37:04,663 INFO L226 Difference]: Without dead ends: 197 [2024-12-02 07:37:04,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-12-02 07:37:04,664 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 200 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:04,664 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 415 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:37:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-12-02 07:37:04,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 155. [2024-12-02 07:37:04,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 130 states have (on average 1.3615384615384616) internal successors, (177), 154 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 07:37:04,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 177 transitions. [2024-12-02 07:37:04,669 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 177 transitions. Word has length 25 [2024-12-02 07:37:04,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:04,669 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 177 transitions. [2024-12-02 07:37:04,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 07:37:04,669 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 177 transitions. [2024-12-02 07:37:04,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 07:37:04,670 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:04,670 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:04,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 07:37:04,670 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:04,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:04,671 INFO L85 PathProgramCache]: Analyzing trace with hash 562291380, now seen corresponding path program 1 times [2024-12-02 07:37:04,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:04,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980176886] [2024-12-02 07:37:04,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:04,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:04,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:05,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980176886] [2024-12-02 07:37:05,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980176886] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:05,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26359586] [2024-12-02 07:37:05,164 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:05,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:05,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:05,166 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:05,169 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:37:05,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:05,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-12-02 07:37:05,277 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:05,284 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 6 treesize of output 5 [2024-12-02 07:37:05,314 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 11 treesize of output 7 [2024-12-02 07:37:05,323 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 07:37:05,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:37:05,374 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:37:05,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:37:05,406 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:37:05,487 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:37:05,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:37:05,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:37:05,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:37:05,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 15 [2024-12-02 07:37:05,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 15 [2024-12-02 07:37:05,644 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 07:37:05,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 32 [2024-12-02 07:37:05,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2024-12-02 07:37:06,113 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:06,123 INFO L349 Elim1Store]: treesize reduction 17, result has 15.0 percent of original size [2024-12-02 07:37:06,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 31 [2024-12-02 07:37:06,138 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:37:06,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2024-12-02 07:37:06,152 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:06,152 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:07,060 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:07,061 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2024-12-02 07:37:07,088 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:07,088 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 1 new quantified variables, introduced 2 case distinctions, treesize of input 18 treesize of output 25 [2024-12-02 07:37:08,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2024-12-02 07:37:08,110 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:08,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2024-12-02 07:37:08,124 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:08,125 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:08,127 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 19 treesize of output 17 [2024-12-02 07:37:08,218 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 47 treesize of output 45 [2024-12-02 07:37:08,237 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:08,238 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:08,240 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 19 treesize of output 17 [2024-12-02 07:37:08,257 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:08,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 34 [2024-12-02 07:37:08,414 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:08,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26359586] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:08,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:08,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 30 [2024-12-02 07:37:08,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359225139] [2024-12-02 07:37:08,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:08,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 07:37:08,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:08,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 07:37:08,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=782, Unknown=6, NotChecked=0, Total=870 [2024-12-02 07:37:08,416 INFO L87 Difference]: Start difference. First operand 155 states and 177 transitions. Second operand has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:10,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:10,206 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2024-12-02 07:37:10,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:37:10,207 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-12-02 07:37:10,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:10,207 INFO L225 Difference]: With dead ends: 182 [2024-12-02 07:37:10,207 INFO L226 Difference]: Without dead ends: 182 [2024-12-02 07:37:10,208 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=180, Invalid=1454, Unknown=6, NotChecked=0, Total=1640 [2024-12-02 07:37:10,208 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 240 mSDsluCounter, 779 mSDsCounter, 0 mSdLazyCounter, 1361 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:10,208 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 837 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1361 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-12-02 07:37:10,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-12-02 07:37:10,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 158. [2024-12-02 07:37:10,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 133 states have (on average 1.3533834586466165) internal successors, (180), 157 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2024-12-02 07:37:10,211 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 26 [2024-12-02 07:37:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:10,211 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2024-12-02 07:37:10,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 30 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2024-12-02 07:37:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 07:37:10,212 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:10,212 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:10,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:37:10,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-12-02 07:37:10,412 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:10,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:10,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1792210484, now seen corresponding path program 1 times [2024-12-02 07:37:10,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:10,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408001192] [2024-12-02 07:37:10,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:10,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:10,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:10,634 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 07:37:10,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:10,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408001192] [2024-12-02 07:37:10,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408001192] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:10,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:10,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:37:10,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512196259] [2024-12-02 07:37:10,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:10,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:37:10,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:10,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:37:10,637 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:37:10,637 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 07:37:10,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:10,881 INFO L93 Difference]: Finished difference Result 209 states and 231 transitions. [2024-12-02 07:37:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:37:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) Word has length 26 [2024-12-02 07:37:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:10,883 INFO L225 Difference]: With dead ends: 209 [2024-12-02 07:37:10,883 INFO L226 Difference]: Without dead ends: 209 [2024-12-02 07:37:10,883 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:37:10,884 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 200 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:10,884 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 282 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:37:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2024-12-02 07:37:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 163. [2024-12-02 07:37:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 138 states have (on average 1.3405797101449275) internal successors, (185), 162 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 07:37:10,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 185 transitions. [2024-12-02 07:37:10,889 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 185 transitions. Word has length 26 [2024-12-02 07:37:10,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:10,890 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 185 transitions. [2024-12-02 07:37:10,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 07:37:10,890 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 185 transitions. [2024-12-02 07:37:10,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:37:10,890 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:10,890 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:10,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 07:37:10,891 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:10,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:10,891 INFO L85 PathProgramCache]: Analyzing trace with hash -604585791, now seen corresponding path program 1 times [2024-12-02 07:37:10,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:10,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449357072] [2024-12-02 07:37:10,891 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:10,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:10,969 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 07:37:10,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449357072] [2024-12-02 07:37:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449357072] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:10,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:10,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:37:10,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250042215] [2024-12-02 07:37:10,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:10,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:37:10,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:10,970 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:37:10,970 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:37:10,970 INFO L87 Difference]: Start difference. First operand 163 states and 185 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:11,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:11,104 INFO L93 Difference]: Finished difference Result 177 states and 197 transitions. [2024-12-02 07:37:11,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:37:11,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:37:11,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:11,105 INFO L225 Difference]: With dead ends: 177 [2024-12-02 07:37:11,105 INFO L226 Difference]: Without dead ends: 177 [2024-12-02 07:37:11,105 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 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 07:37:11,106 INFO L435 NwaCegarLoop]: 65 mSDtfsCounter, 149 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:11,106 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 106 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:37:11,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-12-02 07:37:11,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 164. [2024-12-02 07:37:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 139 states have (on average 1.3381294964028776) internal successors, (186), 163 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:11,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 186 transitions. [2024-12-02 07:37:11,110 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 186 transitions. Word has length 27 [2024-12-02 07:37:11,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:11,110 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 186 transitions. [2024-12-02 07:37:11,111 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:11,111 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 186 transitions. [2024-12-02 07:37:11,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:37:11,111 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:11,111 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:11,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 07:37:11,111 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:11,112 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash 278113049, now seen corresponding path program 1 times [2024-12-02 07:37:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:11,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274703585] [2024-12-02 07:37:11,112 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:11,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:11,414 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 07:37:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:11,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274703585] [2024-12-02 07:37:11,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274703585] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:11,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:37:11,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 07:37:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907819120] [2024-12-02 07:37:11,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:11,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:37:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:11,415 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:37:11,415 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:37:11,415 INFO L87 Difference]: Start difference. First operand 164 states and 186 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:11,825 INFO L93 Difference]: Finished difference Result 190 states and 210 transitions. [2024-12-02 07:37:11,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:37:11,826 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:37:11,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:11,827 INFO L225 Difference]: With dead ends: 190 [2024-12-02 07:37:11,827 INFO L226 Difference]: Without dead ends: 190 [2024-12-02 07:37:11,827 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-12-02 07:37:11,827 INFO L435 NwaCegarLoop]: 74 mSDtfsCounter, 53 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:11,828 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 401 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:37:11,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-12-02 07:37:11,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 170. [2024-12-02 07:37:11,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 145 states have (on average 1.3241379310344827) internal successors, (192), 169 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:11,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 192 transitions. [2024-12-02 07:37:11,832 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 192 transitions. Word has length 27 [2024-12-02 07:37:11,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:11,833 INFO L471 AbstractCegarLoop]: Abstraction has 170 states and 192 transitions. [2024-12-02 07:37:11,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:11,833 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 192 transitions. [2024-12-02 07:37:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:37:11,833 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:11,833 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:11,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 07:37:11,834 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:11,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:11,834 INFO L85 PathProgramCache]: Analyzing trace with hash -403137396, now seen corresponding path program 1 times [2024-12-02 07:37:11,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:11,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994421393] [2024-12-02 07:37:11,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:11,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:12,178 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 07:37:12,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:12,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994421393] [2024-12-02 07:37:12,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994421393] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:12,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480055474] [2024-12-02 07:37:12,179 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:12,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:12,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:12,181 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:12,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:37:12,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:12,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-12-02 07:37:12,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:12,306 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 6 treesize of output 5 [2024-12-02 07:37:12,354 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-02 07:37:12,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-12-02 07:37:12,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:37:12,487 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:12,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-12-02 07:37:12,568 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:37:12,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-12-02 07:37:12,590 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:12,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-12-02 07:37:12,678 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 25 treesize of output 13 [2024-12-02 07:37:12,741 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 07:37:12,741 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:12,837 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_794 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_794) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 07:37:12,847 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_792 (Array Int Int)) (v_ArrVal_794 (Array Int Int))) (= (select |c_#valid| (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_792))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_794)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 07:37:12,904 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:12,904 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2024-12-02 07:37:12,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:12,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 252 treesize of output 227 [2024-12-02 07:37:12,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 171 treesize of output 163 [2024-12-02 07:37:12,932 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:12,932 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 163 treesize of output 159 [2024-12-02 07:37:14,093 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 07:37:14,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480055474] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:14,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:14,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 29 [2024-12-02 07:37:14,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138359409] [2024-12-02 07:37:14,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:14,094 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 07:37:14,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:14,095 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 07:37:14,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=611, Unknown=22, NotChecked=106, Total=870 [2024-12-02 07:37:14,095 INFO L87 Difference]: Start difference. First operand 170 states and 192 transitions. Second operand has 30 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 30 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 07:37:15,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:15,748 INFO L93 Difference]: Finished difference Result 301 states and 339 transitions. [2024-12-02 07:37:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:37:15,749 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 30 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) Word has length 29 [2024-12-02 07:37:15,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:15,750 INFO L225 Difference]: With dead ends: 301 [2024-12-02 07:37:15,750 INFO L226 Difference]: Without dead ends: 301 [2024-12-02 07:37:15,750 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=257, Invalid=1210, Unknown=23, NotChecked=150, Total=1640 [2024-12-02 07:37:15,751 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 472 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 539 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:15,751 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 618 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1341 Invalid, 0 Unknown, 539 Unchecked, 1.3s Time] [2024-12-02 07:37:15,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-12-02 07:37:15,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 191. [2024-12-02 07:37:15,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 166 states have (on average 1.3132530120481927) internal successors, (218), 190 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:15,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 218 transitions. [2024-12-02 07:37:15,757 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 218 transitions. Word has length 29 [2024-12-02 07:37:15,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:15,757 INFO L471 AbstractCegarLoop]: Abstraction has 191 states and 218 transitions. [2024-12-02 07:37:15,758 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 30 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 07:37:15,758 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 218 transitions. [2024-12-02 07:37:15,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:37:15,758 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:15,758 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:15,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:37:15,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:15,959 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:15,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:15,960 INFO L85 PathProgramCache]: Analyzing trace with hash -403137395, now seen corresponding path program 1 times [2024-12-02 07:37:15,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:15,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870503903] [2024-12-02 07:37:15,960 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:15,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:15,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:16,465 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 07:37:16,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:16,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870503903] [2024-12-02 07:37:16,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870503903] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:16,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652939072] [2024-12-02 07:37:16,466 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:16,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:16,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:16,468 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:16,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:37:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:16,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-12-02 07:37:16,568 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:16,570 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 6 treesize of output 5 [2024-12-02 07:37:16,621 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:37:16,621 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:37:16,631 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 8 treesize of output 1 [2024-12-02 07:37:16,655 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 07:37:16,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:37:16,742 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:16,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:37:16,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:37:16,808 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:37:16,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-12-02 07:37:16,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:37:16,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:37:16,828 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:16,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:37:16,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:37:16,910 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 25 treesize of output 13 [2024-12-02 07:37:16,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-12-02 07:37:16,919 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 07:37:16,919 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:17,020 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int))) (<= (+ 4 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_897) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_898 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2024-12-02 07:37:17,091 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_897) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_898 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 07:37:17,107 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_894 (Array Int Int)) (v_ArrVal_893 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_894) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_893) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int)) (v_ArrVal_894 (Array Int Int)) (v_ArrVal_893 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_893))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_894) .cse0 v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store .cse1 .cse0 v_ArrVal_897) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))) is different from false [2024-12-02 07:37:17,119 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_897 (Array Int Int)) (v_ArrVal_894 (Array Int Int)) (v_ArrVal_893 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_893))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_894) .cse1 v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_897) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_898 (Array Int Int)) (v_ArrVal_894 (Array Int Int)) (v_ArrVal_893 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_894) (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_893) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_898) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 07:37:17,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,133 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2024-12-02 07:37:17,138 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,138 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2024-12-02 07:37:17,148 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,148 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 334 treesize of output 301 [2024-12-02 07:37:17,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,168 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 826 treesize of output 793 [2024-12-02 07:37:17,180 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 180 treesize of output 172 [2024-12-02 07:37:17,186 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 172 treesize of output 164 [2024-12-02 07:37:17,194 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 84 treesize of output 80 [2024-12-02 07:37:17,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 160 treesize of output 150 [2024-12-02 07:37:17,355 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,355 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 37 [2024-12-02 07:37:17,363 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:17,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2024-12-02 07:37:17,366 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:17,372 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 28 treesize of output 20 [2024-12-02 07:37:17,375 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:37:17,378 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2024-12-02 07:37:17,495 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 07:37:17,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652939072] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:17,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:17,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 13] total 34 [2024-12-02 07:37:17,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753444831] [2024-12-02 07:37:17,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:17,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 07:37:17,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:17,496 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 07:37:17,496 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=805, Unknown=11, NotChecked=244, Total=1190 [2024-12-02 07:37:17,496 INFO L87 Difference]: Start difference. First operand 191 states and 218 transitions. Second operand has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:18,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:18,914 INFO L93 Difference]: Finished difference Result 271 states and 300 transitions. [2024-12-02 07:37:18,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:37:18,915 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-12-02 07:37:18,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:18,915 INFO L225 Difference]: With dead ends: 271 [2024-12-02 07:37:18,915 INFO L226 Difference]: Without dead ends: 271 [2024-12-02 07:37:18,916 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=390, Invalid=1967, Unknown=11, NotChecked=388, Total=2756 [2024-12-02 07:37:18,916 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 542 mSDsluCounter, 805 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 893 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:18,916 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 880 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1452 Invalid, 0 Unknown, 893 Unchecked, 0.8s Time] [2024-12-02 07:37:18,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2024-12-02 07:37:18,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 202. [2024-12-02 07:37:18,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 180 states have (on average 1.2722222222222221) internal successors, (229), 201 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:18,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 229 transitions. [2024-12-02 07:37:18,920 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 229 transitions. Word has length 29 [2024-12-02 07:37:18,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:18,920 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 229 transitions. [2024-12-02 07:37:18,920 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.4411764705882355) internal successors, (83), 35 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:18,920 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 229 transitions. [2024-12-02 07:37:18,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 07:37:18,920 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:18,920 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:18,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:37:19,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 07:37:19,121 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:19,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1918220234, now seen corresponding path program 1 times [2024-12-02 07:37:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:19,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651261953] [2024-12-02 07:37:19,121 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:19,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:19,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:19,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651261953] [2024-12-02 07:37:19,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651261953] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:19,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224713353] [2024-12-02 07:37:19,267 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:19,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:19,267 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:19,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:19,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:37:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:19,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 07:37:19,393 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:19,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:37:19,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 12 [2024-12-02 07:37:19,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:37:19,521 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:37:19,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224713353] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:37:19,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:37:19,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2024-12-02 07:37:19,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383674335] [2024-12-02 07:37:19,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:37:19,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:37:19,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:19,522 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:37:19,522 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-12-02 07:37:19,522 INFO L87 Difference]: Start difference. First operand 202 states and 229 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:19,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:19,719 INFO L93 Difference]: Finished difference Result 225 states and 250 transitions. [2024-12-02 07:37:19,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:37:19,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-12-02 07:37:19,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:19,720 INFO L225 Difference]: With dead ends: 225 [2024-12-02 07:37:19,720 INFO L226 Difference]: Without dead ends: 225 [2024-12-02 07:37:19,720 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2024-12-02 07:37:19,721 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 104 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:19,722 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 351 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:37:19,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-12-02 07:37:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 202. [2024-12-02 07:37:19,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 180 states have (on average 1.261111111111111) internal successors, (227), 201 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 227 transitions. [2024-12-02 07:37:19,725 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 227 transitions. Word has length 31 [2024-12-02 07:37:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:19,725 INFO L471 AbstractCegarLoop]: Abstraction has 202 states and 227 transitions. [2024-12-02 07:37:19,725 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 9 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 227 transitions. [2024-12-02 07:37:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 07:37:19,726 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:19,726 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:19,732 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:37:19,926 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 07:37:19,926 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:19,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -956700098, now seen corresponding path program 1 times [2024-12-02 07:37:19,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:19,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846481997] [2024-12-02 07:37:19,927 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:19,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:20,347 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 07:37:20,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:20,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846481997] [2024-12-02 07:37:20,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846481997] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:20,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245240010] [2024-12-02 07:37:20,347 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:20,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:20,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:20,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:37:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:20,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-12-02 07:37:20,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:20,462 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 6 treesize of output 5 [2024-12-02 07:37:20,494 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-02 07:37:20,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-12-02 07:37:20,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:37:20,597 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:20,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-12-02 07:37:20,670 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:37:20,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-12-02 07:37:20,686 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:20,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-12-02 07:37:20,761 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 25 treesize of output 13 [2024-12-02 07:37:20,805 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-12-02 07:37:20,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2024-12-02 07:37:20,855 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 07:37:20,855 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:21,096 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1123 Int) (v_ArrVal_1122 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc12#1.base_10| Int) (v_ArrVal_1120 (Array Int Int))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc12#1.base_10|) 0)) (= (select (store |c_#valid| |v_ULTIMATE.start_main_#t~malloc12#1.base_10| v_ArrVal_1123) (select (select (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1120))) (store .cse0 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1122)) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))) is different from false [2024-12-02 07:37:21,165 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:21,165 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 34 [2024-12-02 07:37:21,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:21,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 276 treesize of output 251 [2024-12-02 07:37:21,188 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 187 [2024-12-02 07:37:21,195 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:21,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 187 treesize of output 183 [2024-12-02 07:37:24,748 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 07:37:24,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245240010] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:24,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:24,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 13] total 32 [2024-12-02 07:37:24,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655440145] [2024-12-02 07:37:24,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:24,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-12-02 07:37:24,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:24,750 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-12-02 07:37:24,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=835, Unknown=13, NotChecked=60, Total=1056 [2024-12-02 07:37:24,750 INFO L87 Difference]: Start difference. First operand 202 states and 227 transitions. Second operand has 33 states, 32 states have (on average 2.78125) internal successors, (89), 33 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 07:37:27,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:27,551 INFO L93 Difference]: Finished difference Result 345 states and 380 transitions. [2024-12-02 07:37:27,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:37:27,551 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-12-02 07:37:27,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:27,552 INFO L225 Difference]: With dead ends: 345 [2024-12-02 07:37:27,552 INFO L226 Difference]: Without dead ends: 345 [2024-12-02 07:37:27,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=282, Invalid=1431, Unknown=13, NotChecked=80, Total=1806 [2024-12-02 07:37:27,553 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 452 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1849 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 2202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:27,553 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 960 Invalid, 2202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1849 Invalid, 0 Unknown, 276 Unchecked, 2.5s Time] [2024-12-02 07:37:27,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2024-12-02 07:37:27,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 209. [2024-12-02 07:37:27,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 188 states have (on average 1.2553191489361701) internal successors, (236), 208 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:27,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 236 transitions. [2024-12-02 07:37:27,557 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 236 transitions. Word has length 34 [2024-12-02 07:37:27,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:27,558 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 236 transitions. [2024-12-02 07:37:27,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.78125) internal successors, (89), 33 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 07:37:27,558 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 236 transitions. [2024-12-02 07:37:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 07:37:27,558 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:27,558 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:27,565 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:37:27,759 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-12-02 07:37:27,759 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:27,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:27,759 INFO L85 PathProgramCache]: Analyzing trace with hash -956700097, now seen corresponding path program 1 times [2024-12-02 07:37:27,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:27,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302412701] [2024-12-02 07:37:27,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:27,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:28,282 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 07:37:28,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302412701] [2024-12-02 07:37:28,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302412701] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:28,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138194493] [2024-12-02 07:37:28,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:37:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:28,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:28,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:37:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:37:28,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-12-02 07:37:28,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:28,406 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 6 treesize of output 5 [2024-12-02 07:37:28,432 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 07:37:28,440 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:37:28,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:37:28,463 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 07:37:28,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:37:28,534 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:28,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2024-12-02 07:37:28,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:37:28,603 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:37:28,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-12-02 07:37:28,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:37:28,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:37:28,644 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:28,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:37:28,650 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:37:28,724 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 25 treesize of output 13 [2024-12-02 07:37:28,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-12-02 07:37:28,757 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:37:28,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 07:37:28,797 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 07:37:28,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:29,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,608 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 77 [2024-12-02 07:37:29,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,614 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 65 [2024-12-02 07:37:29,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 383 treesize of output 346 [2024-12-02 07:37:29,655 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 534 treesize of output 517 [2024-12-02 07:37:29,666 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 204 treesize of output 196 [2024-12-02 07:37:29,672 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 196 treesize of output 188 [2024-12-02 07:37:29,679 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 96 treesize of output 92 [2024-12-02 07:37:29,691 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 195 treesize of output 183 [2024-12-02 07:37:29,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,865 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2024-12-02 07:37:29,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,871 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 43 [2024-12-02 07:37:29,875 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 79 treesize of output 67 [2024-12-02 07:37:29,892 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:29,892 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 111 [2024-12-02 07:37:29,899 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 80 treesize of output 70 [2024-12-02 07:37:29,903 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 88 treesize of output 82 [2024-12-02 07:37:29,908 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 56 treesize of output 54 [2024-12-02 07:37:30,206 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:30,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 160 treesize of output 231 [2024-12-02 07:37:30,569 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 07:37:30,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138194493] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:37:30,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:37:30,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 14] total 35 [2024-12-02 07:37:30,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489296227] [2024-12-02 07:37:30,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:37:30,570 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 07:37:30,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:37:30,570 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 07:37:30,571 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1131, Unknown=4, NotChecked=0, Total=1260 [2024-12-02 07:37:30,571 INFO L87 Difference]: Start difference. First operand 209 states and 236 transitions. Second operand has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 36 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:33,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:37:33,634 INFO L93 Difference]: Finished difference Result 328 states and 362 transitions. [2024-12-02 07:37:33,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-12-02 07:37:33,634 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 36 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-12-02 07:37:33,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:37:33,635 INFO L225 Difference]: With dead ends: 328 [2024-12-02 07:37:33,636 INFO L226 Difference]: Without dead ends: 328 [2024-12-02 07:37:33,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=415, Invalid=2773, Unknown=4, NotChecked=0, Total=3192 [2024-12-02 07:37:33,637 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 508 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2418 mSolverCounterSat, 68 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 2418 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:37:33,637 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [508 Valid, 1212 Invalid, 2498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 2418 Invalid, 12 Unknown, 0 Unchecked, 2.2s Time] [2024-12-02 07:37:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-12-02 07:37:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 208. [2024-12-02 07:37:33,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 188 states have (on average 1.2446808510638299) internal successors, (234), 207 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2024-12-02 07:37:33,642 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 34 [2024-12-02 07:37:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:37:33,643 INFO L471 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2024-12-02 07:37:33,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 36 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:37:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2024-12-02 07:37:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 07:37:33,643 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:37:33,643 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:37:33,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:37:33,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 07:37:33,844 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:37:33,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:37:33,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1840791617, now seen corresponding path program 2 times [2024-12-02 07:37:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:37:33,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891120225] [2024-12-02 07:37:33,844 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:33,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:37:33,861 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:37:33,861 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:34,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:34,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:37:34,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891120225] [2024-12-02 07:37:34,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891120225] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:37:34,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180939120] [2024-12-02 07:37:34,292 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:37:34,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:37:34,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:37:34,294 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:37:34,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:37:34,409 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:37:34,409 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:37:34,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 07:37:34,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:37:34,417 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 6 treesize of output 5 [2024-12-02 07:37:34,475 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:37:34,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:37:34,501 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 07:37:34,511 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:37:34,593 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:37:34,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2024-12-02 07:37:34,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:37:34,684 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:37:34,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-12-02 07:37:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:37:34,690 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:37:34,705 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-12-02 07:37:34,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 33 [2024-12-02 07:37:34,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 22 [2024-12-02 07:37:34,981 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:37:34,981 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:37:35,268 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:35,268 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 65 [2024-12-02 07:37:35,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:35,273 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 66 [2024-12-02 07:37:35,745 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1363 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1363))) (let ((.cse0 (select (select .cse5 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (forall ((v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1364))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse1 (store .cse5 .cse3 v_arrayElimArr_14))) (let ((.cse4 (select (select .cse1 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (forall ((v_arrayElimArr_13 (Array Int Int))) (or (not (= (select v_arrayElimArr_13 .cse0) 0)) (= (select (select .cse1 (select (select (store .cse2 .cse3 v_arrayElimArr_13) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) .cse4) 0))) (< .cse4 0) (not (= (select v_arrayElimArr_14 .cse0) 0)))))))) (< .cse0 0))))) (forall ((v_ArrVal_1363 (Array Int Int))) (let ((.cse11 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1363))) (let ((.cse6 (select (select .cse11 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (< .cse6 0) (forall ((v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (let ((.cse8 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1364))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse10 (select (select (store .cse11 .cse9 v_arrayElimArr_14) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (forall ((v_arrayElimArr_13 (Array Int Int))) (or (= (select (let ((.cse7 (store .cse8 .cse9 v_arrayElimArr_13))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) .cse10) 0) (not (= (select v_arrayElimArr_13 .cse6) 0)))) (< .cse10 0) (not (= (select v_arrayElimArr_14 .cse6) 0)))))))))))) is different from false [2024-12-02 07:37:35,800 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse6 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_1363 (Array Int Int))) (let ((.cse5 (store |c_#memory_$Pointer$#1.offset| .cse6 v_ArrVal_1363))) (let ((.cse1 (select (select .cse5 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (forall ((v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| .cse6 v_ArrVal_1364))) (let ((.cse4 (select (select .cse3 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse2 (store .cse5 .cse4 v_arrayElimArr_14))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse0 0) (not (= (select v_arrayElimArr_14 .cse1) 0)) (forall ((v_arrayElimArr_13 (Array Int Int))) (or (= (select (select .cse2 (select (select (store .cse3 .cse4 v_arrayElimArr_13) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) .cse0) 0) (not (= (select v_arrayElimArr_13 .cse1) 0)))))))))) (< .cse1 0))))) (forall ((v_ArrVal_1363 (Array Int Int))) (let ((.cse12 (store |c_#memory_$Pointer$#1.offset| .cse6 v_ArrVal_1363))) (let ((.cse11 (select (select .cse12 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (forall ((v_arrayElimArr_14 (Array Int Int)) (v_ArrVal_1364 (Array Int Int))) (let ((.cse8 (store |c_#memory_$Pointer$#1.base| .cse6 v_ArrVal_1364))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse10 (select (select (store .cse12 .cse9 v_arrayElimArr_14) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (forall ((v_arrayElimArr_13 (Array Int Int))) (or (= (select (let ((.cse7 (store .cse8 .cse9 v_arrayElimArr_13))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) .cse10) 0) (not (= (select v_arrayElimArr_13 .cse11) 0)))) (< .cse10 0) (not (= (select v_arrayElimArr_14 .cse11) 0))))))) (< .cse11 0))))))) is different from false [2024-12-02 07:37:35,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:35,855 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 199 treesize of output 167 [2024-12-02 07:37:35,863 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:35,863 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 83 [2024-12-02 07:37:36,179 INFO L349 Elim1Store]: treesize reduction 154, result has 69.8 percent of original size [2024-12-02 07:37:36,179 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 2026 treesize of output 1893 [2024-12-02 07:37:36,330 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:36,331 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 1415 treesize of output 1249 [2024-12-02 07:37:36,410 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:36,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3723 treesize of output 3442 [2024-12-02 07:37:36,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:36,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1615 treesize of output 1583 [2024-12-02 07:37:36,753 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:36,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1924 treesize of output 1854 [2024-12-02 07:37:36,940 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:37:36,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 1243 treesize of output 1247 [2024-12-02 07:40:16,047 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-12-02 07:40:16,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-12-02 07:40:16,048 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-12-02 07:40:16,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:40:16,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 07:40:16,249 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseSuccess(Executor.java:277) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.checkRedundancy(SimplifyDDA2.java:275) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convertForPreprocessedInputTerms(SimplifyDDA2.java:499) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:484) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.convert(SimplifyDDA2.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:590) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:245) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:318) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify(QuantifierPusher.java:728) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:133) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.pushMinionEliminatees(QuantifierPushUtilsForSubsetPush.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushUtilsForSubsetPush.sequentialSubsetPush(QuantifierPushUtilsForSubsetPush.java:151) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:189) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:209) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:100) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:84) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:297) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:283) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:51) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:234) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:416) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:395) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:267) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:325) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:181) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:160) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:317) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:407) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:342) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:324) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:428) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:314) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:275) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:132) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1518) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:701) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:258) ... 69 more [2024-12-02 07:40:16,253 INFO L158 Benchmark]: Toolchain (without parser) took 200567.57ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 91.2MB in the beginning and 464.8MB in the end (delta: -373.6MB). Peak memory consumption was 750.2MB. Max. memory is 16.1GB. [2024-12-02 07:40:16,253 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 72.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 07:40:16,254 INFO L158 Benchmark]: CACSL2BoogieTranslator took 347.90ms. Allocated memory is still 117.4MB. Free memory was 91.2MB in the beginning and 74.0MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 07:40:16,254 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.01ms. Allocated memory is still 117.4MB. Free memory was 73.7MB in the beginning and 72.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 07:40:16,254 INFO L158 Benchmark]: Boogie Preprocessor took 41.87ms. Allocated memory is still 117.4MB. Free memory was 72.0MB in the beginning and 69.9MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 07:40:16,254 INFO L158 Benchmark]: RCFGBuilder took 595.90ms. Allocated memory is still 117.4MB. Free memory was 69.6MB in the beginning and 45.0MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2024-12-02 07:40:16,254 INFO L158 Benchmark]: TraceAbstraction took 199535.83ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 44.4MB in the beginning and 464.8MB in the end (delta: -420.4MB). Peak memory consumption was 699.9MB. Max. memory is 16.1GB. [2024-12-02 07:40:16,255 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 117.4MB. Free memory was 72.2MB in the beginning and 72.0MB in the end (delta: 146.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 347.90ms. Allocated memory is still 117.4MB. Free memory was 91.2MB in the beginning and 74.0MB in the end (delta: 17.3MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.01ms. Allocated memory is still 117.4MB. Free memory was 73.7MB in the beginning and 72.0MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 41.87ms. Allocated memory is still 117.4MB. Free memory was 72.0MB in the beginning and 69.9MB in the end (delta: 2.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 595.90ms. Allocated memory is still 117.4MB. Free memory was 69.6MB in the beginning and 45.0MB in the end (delta: 24.6MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 199535.83ms. Allocated memory was 117.4MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 44.4MB in the beginning and 464.8MB in the end (delta: -420.4MB). Peak memory consumption was 699.9MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") : de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:262) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/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_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/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 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:40:17,981 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:40:18,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-12-02 07:40:18,061 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:40:18,061 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:40:18,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:40:18,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:40:18,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:40:18,085 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:40:18,085 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:40:18,085 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:40:18,086 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:40:18,086 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:40:18,086 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:40:18,086 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:40:18,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:40:18,087 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:40:18,088 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:40:18,088 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:40:18,088 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:40:18,089 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:40:18,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:40:18,089 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_45d280e4-f348-4f37-aeb5-c112843fd213/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 -> 9d8386495cfc7d925686020c12a2509d702f4bf2aed1f5dea2d7da468cac3b6e [2024-12-02 07:40:18,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:40:18,319 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:40:18,321 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:40:18,323 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:40:18,323 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:40:18,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2024-12-02 07:40:21,006 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/60e614d67/ae31682f7f534ce0b2c7de32832c69b3/FLAG2c1126056 [2024-12-02 07:40:21,220 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:40:21,220 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/sv-benchmarks/c/forester-heap/dll-simple-white-blue-2.i [2024-12-02 07:40:21,232 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/60e614d67/ae31682f7f534ce0b2c7de32832c69b3/FLAG2c1126056 [2024-12-02 07:40:21,245 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/data/60e614d67/ae31682f7f534ce0b2c7de32832c69b3 [2024-12-02 07:40:21,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:40:21,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:40:21,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:40:21,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:40:21,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:40:21,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,253 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bbb701a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21, skipping insertion in model container [2024-12-02 07:40:21,253 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,278 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:40:21,484 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:40:21,495 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:40:21,534 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:40:21,556 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:40:21,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21 WrapperNode [2024-12-02 07:40:21,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:40:21,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:40:21,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:40:21,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:40:21,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,575 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,593 INFO L138 Inliner]: procedures = 122, calls = 39, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 118 [2024-12-02 07:40:21,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:40:21,594 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:40:21,594 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:40:21,594 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:40:21,600 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,600 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,604 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,619 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 15 writes are split as follows [0, 15]. [2024-12-02 07:40:21,619 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,619 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,629 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,630 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,633 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,635 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,636 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,639 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:40:21,640 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:40:21,640 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:40:21,640 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:40:21,641 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (1/1) ... [2024-12-02 07:40:21,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:40:21,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:21,669 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:40:21,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:40:21,694 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 07:40:21,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 07:40:21,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:40:21,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:40:21,799 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:40:21,810 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:40:22,336 INFO L? ?]: Removed 126 outVars from TransFormulas that were not future-live. [2024-12-02 07:40:22,336 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:40:22,347 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:40:22,348 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-12-02 07:40:22,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:40:22 BoogieIcfgContainer [2024-12-02 07:40:22,348 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:40:22,350 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:40:22,350 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:40:22,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:40:22,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:40:21" (1/3) ... [2024-12-02 07:40:22,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ba7880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:40:22, skipping insertion in model container [2024-12-02 07:40:22,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:40:21" (2/3) ... [2024-12-02 07:40:22,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@54ba7880 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:40:22, skipping insertion in model container [2024-12-02 07:40:22,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:40:22" (3/3) ... [2024-12-02 07:40:22,357 INFO L128 eAbstractionObserver]: Analyzing ICFG dll-simple-white-blue-2.i [2024-12-02 07:40:22,370 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:40:22,371 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll-simple-white-blue-2.i that has 1 procedures, 130 locations, 1 initial locations, 6 loop locations, and 59 error locations. [2024-12-02 07:40:22,400 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:40:22,410 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;@1a1cefaf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:40:22,411 INFO L334 AbstractCegarLoop]: Starting to check reachability of 59 error locations. [2024-12-02 07:40:22,414 INFO L276 IsEmpty]: Start isEmpty. Operand has 130 states, 70 states have (on average 2.1) internal successors, (147), 129 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 07:40:22,419 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:22,419 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 07:40:22,420 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:22,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:22,423 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-12-02 07:40:22,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:22,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918219056] [2024-12-02 07:40:22,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:22,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:22,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:22,433 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:22,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:40:22,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:22,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 07:40:22,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:22,572 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 6 treesize of output 7 [2024-12-02 07:40:22,589 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 07:40:22,589 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:22,590 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:22,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918219056] [2024-12-02 07:40:22,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918219056] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:22,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:22,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:40:22,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042605907] [2024-12-02 07:40:22,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:22,596 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:40:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:22,618 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:40:22,618 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:40:22,620 INFO L87 Difference]: Start difference. First operand has 130 states, 70 states have (on average 2.1) internal successors, (147), 129 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:22,900 INFO L93 Difference]: Finished difference Result 152 states and 161 transitions. [2024-12-02 07:40:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:40:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-12-02 07:40:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:22,908 INFO L225 Difference]: With dead ends: 152 [2024-12-02 07:40:22,909 INFO L226 Difference]: Without dead ends: 150 [2024-12-02 07:40:22,910 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 07:40:22,913 INFO L435 NwaCegarLoop]: 104 mSDtfsCounter, 101 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:22,913 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 130 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:40:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-12-02 07:40:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2024-12-02 07:40:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 67 states have (on average 1.9402985074626866) internal successors, (130), 122 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 130 transitions. [2024-12-02 07:40:22,949 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 130 transitions. Word has length 3 [2024-12-02 07:40:22,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:22,949 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 130 transitions. [2024-12-02 07:40:22,949 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:22,949 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 130 transitions. [2024-12-02 07:40:22,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 07:40:22,950 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:22,950 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 07:40:22,957 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:40:23,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:23,151 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:23,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:23,151 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-12-02 07:40:23,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:23,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855995446] [2024-12-02 07:40:23,152 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:23,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:23,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:23,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:23,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:40:23,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:23,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 07:40:23,199 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:23,207 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 6 treesize of output 5 [2024-12-02 07:40:23,224 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 07:40:23,224 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:23,224 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:23,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855995446] [2024-12-02 07:40:23,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855995446] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:23,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:23,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:40:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155570443] [2024-12-02 07:40:23,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:23,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:40:23,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:23,226 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:40:23,226 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:40:23,226 INFO L87 Difference]: Start difference. First operand 123 states and 130 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:23,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:23,502 INFO L93 Difference]: Finished difference Result 147 states and 156 transitions. [2024-12-02 07:40:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:40:23,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2024-12-02 07:40:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:23,503 INFO L225 Difference]: With dead ends: 147 [2024-12-02 07:40:23,503 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 07:40:23,504 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 07:40:23,504 INFO L435 NwaCegarLoop]: 102 mSDtfsCounter, 101 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:23,505 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 126 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:40:23,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 07:40:23,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 120. [2024-12-02 07:40:23,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 67 states have (on average 1.8955223880597014) internal successors, (127), 119 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 07:40:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2024-12-02 07:40:23,511 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 3 [2024-12-02 07:40:23,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:23,511 INFO L471 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2024-12-02 07:40:23,511 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:23,511 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2024-12-02 07:40:23,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 07:40:23,512 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:23,512 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:23,519 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 07:40:23,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:23,713 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:23,713 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:23,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1115865774, now seen corresponding path program 1 times [2024-12-02 07:40:23,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:23,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [88352643] [2024-12-02 07:40:23,714 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:23,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:23,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:23,715 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:23,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:40:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:23,784 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 07:40:23,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:23,855 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 07:40:23,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-12-02 07:40:23,864 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 07:40:23,864 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:23,864 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:23,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88352643] [2024-12-02 07:40:23,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88352643] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:23,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:23,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:40:23,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886969291] [2024-12-02 07:40:23,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:23,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:40:23,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:23,866 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:40:23,866 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:40:23,866 INFO L87 Difference]: Start difference. First operand 120 states and 127 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 07:40:24,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:24,277 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2024-12-02 07:40:24,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:40:24,278 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 07:40:24,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:24,278 INFO L225 Difference]: With dead ends: 117 [2024-12-02 07:40:24,279 INFO L226 Difference]: Without dead ends: 117 [2024-12-02 07:40:24,279 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 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 07:40:24,279 INFO L435 NwaCegarLoop]: 44 mSDtfsCounter, 138 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:24,280 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 53 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:40:24,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-12-02 07:40:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 113. [2024-12-02 07:40:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 112 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 07:40:24,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 126 transitions. [2024-12-02 07:40:24,286 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 126 transitions. Word has length 10 [2024-12-02 07:40:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:24,286 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 126 transitions. [2024-12-02 07:40:24,286 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 07:40:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 126 transitions. [2024-12-02 07:40:24,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-12-02 07:40:24,286 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:24,286 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:24,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:40:24,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:24,487 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:24,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1115865775, now seen corresponding path program 1 times [2024-12-02 07:40:24,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:24,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1527033938] [2024-12-02 07:40:24,488 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:24,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:24,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:24,490 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:24,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:40:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:24,558 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 07:40:24,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:24,569 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 6 treesize of output 5 [2024-12-02 07:40:24,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:40:24,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 9 [2024-12-02 07:40:24,746 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:40:24,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:40:24,762 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 07:40:24,762 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:24,762 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:24,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527033938] [2024-12-02 07:40:24,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527033938] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:24,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:24,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:40:24,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398637383] [2024-12-02 07:40:24,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:24,763 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:40:24,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:24,763 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:40:24,763 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:40:24,764 INFO L87 Difference]: Start difference. First operand 113 states and 126 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 07:40:25,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:25,271 INFO L93 Difference]: Finished difference Result 147 states and 162 transitions. [2024-12-02 07:40:25,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:40:25,271 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 07:40:25,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:25,272 INFO L225 Difference]: With dead ends: 147 [2024-12-02 07:40:25,272 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 07:40:25,272 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:40:25,272 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 162 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:25,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 105 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:40:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 07:40:25,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 135. [2024-12-02 07:40:25,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 101 states have (on average 1.5148514851485149) internal successors, (153), 134 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 07:40:25,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 153 transitions. [2024-12-02 07:40:25,279 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 153 transitions. Word has length 10 [2024-12-02 07:40:25,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:25,280 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 153 transitions. [2024-12-02 07:40:25,280 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 07:40:25,280 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 153 transitions. [2024-12-02 07:40:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 07:40:25,280 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:25,280 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:25,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:40:25,481 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:25,481 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:25,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:25,481 INFO L85 PathProgramCache]: Analyzing trace with hash -289600750, now seen corresponding path program 1 times [2024-12-02 07:40:25,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:25,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1300501236] [2024-12-02 07:40:25,482 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:25,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:25,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:25,483 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:25,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:40:25,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:25,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 07:40:25,551 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:25,556 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 6 treesize of output 7 [2024-12-02 07:40:25,570 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 15 treesize of output 1 [2024-12-02 07:40:25,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2024-12-02 07:40:25,600 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 07:40:25,601 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:25,601 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300501236] [2024-12-02 07:40:25,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300501236] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:25,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:25,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:40:25,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183209943] [2024-12-02 07:40:25,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:25,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:40:25,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:25,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:40:25,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:40:25,602 INFO L87 Difference]: Start difference. First operand 135 states and 153 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:25,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:25,937 INFO L93 Difference]: Finished difference Result 134 states and 151 transitions. [2024-12-02 07:40:25,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:40:25,938 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-12-02 07:40:25,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:25,938 INFO L225 Difference]: With dead ends: 134 [2024-12-02 07:40:25,938 INFO L226 Difference]: Without dead ends: 134 [2024-12-02 07:40:25,938 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:40:25,939 INFO L435 NwaCegarLoop]: 100 mSDtfsCounter, 4 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:25,939 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 249 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:40:25,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-12-02 07:40:25,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2024-12-02 07:40:25,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 101 states have (on average 1.495049504950495) internal successors, (151), 133 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 07:40:25,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2024-12-02 07:40:25,945 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 13 [2024-12-02 07:40:25,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:25,945 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2024-12-02 07:40:25,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:25,945 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2024-12-02 07:40:25,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 07:40:25,946 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:25,946 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:25,953 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:40:26,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:26,146 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:26,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:26,147 INFO L85 PathProgramCache]: Analyzing trace with hash -289600749, now seen corresponding path program 1 times [2024-12-02 07:40:26,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:26,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096026350] [2024-12-02 07:40:26,147 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:26,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:26,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:26,149 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:26,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:40:26,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:26,213 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 07:40:26,214 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:26,220 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 6 treesize of output 5 [2024-12-02 07:40:26,238 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 07:40:26,246 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 15 treesize of output 1 [2024-12-02 07:40:26,278 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 17 treesize of output 9 [2024-12-02 07:40:26,295 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 07:40:26,295 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:26,295 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:26,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096026350] [2024-12-02 07:40:26,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096026350] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:26,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:26,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:40:26,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946348491] [2024-12-02 07:40:26,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:26,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:40:26,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:26,296 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:40:26,296 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:40:26,297 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:26,661 INFO L93 Difference]: Finished difference Result 133 states and 149 transitions. [2024-12-02 07:40:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:40:26,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-12-02 07:40:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:26,662 INFO L225 Difference]: With dead ends: 133 [2024-12-02 07:40:26,663 INFO L226 Difference]: Without dead ends: 133 [2024-12-02 07:40:26,663 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:40:26,663 INFO L435 NwaCegarLoop]: 101 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:26,663 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:40:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-12-02 07:40:26,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2024-12-02 07:40:26,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 101 states have (on average 1.4752475247524752) internal successors, (149), 132 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 07:40:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 149 transitions. [2024-12-02 07:40:26,668 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 149 transitions. Word has length 13 [2024-12-02 07:40:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:26,668 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 149 transitions. [2024-12-02 07:40:26,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:26,668 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 149 transitions. [2024-12-02 07:40:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 07:40:26,669 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:26,669 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:26,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:40:26,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:26,870 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:26,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:26,870 INFO L85 PathProgramCache]: Analyzing trace with hash -465627308, now seen corresponding path program 1 times [2024-12-02 07:40:26,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:26,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1131597273] [2024-12-02 07:40:26,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:26,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:26,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:26,872 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:26,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:40:26,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:26,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 07:40:26,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:26,950 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 6 treesize of output 7 [2024-12-02 07:40:26,991 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-12-02 07:40:26,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 27 [2024-12-02 07:40:27,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:40:27,115 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:40:27,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-12-02 07:40:27,142 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 27 treesize of output 15 [2024-12-02 07:40:27,213 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 07:40:27,213 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:27,213 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:27,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131597273] [2024-12-02 07:40:27,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131597273] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:27,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:27,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:40:27,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034428382] [2024-12-02 07:40:27,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:27,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:40:27,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:27,214 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:40:27,214 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:40:27,214 INFO L87 Difference]: Start difference. First operand 133 states and 149 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:28,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:28,188 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2024-12-02 07:40:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:40:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 07:40:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:28,189 INFO L225 Difference]: With dead ends: 147 [2024-12-02 07:40:28,189 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 07:40:28,189 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:40:28,190 INFO L435 NwaCegarLoop]: 55 mSDtfsCounter, 137 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:28,190 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 210 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:40:28,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 07:40:28,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 132. [2024-12-02 07:40:28,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 101 states have (on average 1.4653465346534653) internal successors, (148), 131 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:28,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 148 transitions. [2024-12-02 07:40:28,195 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 148 transitions. Word has length 17 [2024-12-02 07:40:28,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:28,195 INFO L471 AbstractCegarLoop]: Abstraction has 132 states and 148 transitions. [2024-12-02 07:40:28,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:28,195 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 148 transitions. [2024-12-02 07:40:28,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 07:40:28,196 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:28,196 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:28,201 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:40:28,396 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:28,396 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:28,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:28,397 INFO L85 PathProgramCache]: Analyzing trace with hash -465627307, now seen corresponding path program 1 times [2024-12-02 07:40:28,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:28,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [295443833] [2024-12-02 07:40:28,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:28,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:28,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:28,398 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:28,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:40:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:28,469 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 07:40:28,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:28,474 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 6 treesize of output 7 [2024-12-02 07:40:28,501 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 6 treesize of output 5 [2024-12-02 07:40:28,513 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:40:28,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:40:28,549 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 07:40:28,557 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:40:28,648 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:40:28,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:40:28,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:40:28,685 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 25 treesize of output 13 [2024-12-02 07:40:28,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-12-02 07:40:28,729 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 07:40:28,729 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:28,729 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:28,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295443833] [2024-12-02 07:40:28,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295443833] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:28,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:28,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:40:28,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470793314] [2024-12-02 07:40:28,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:28,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:40:28,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:28,730 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:40:28,730 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:40:28,730 INFO L87 Difference]: Start difference. First operand 132 states and 148 transitions. Second operand has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:29,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:29,764 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2024-12-02 07:40:29,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:40:29,764 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 07:40:29,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:29,765 INFO L225 Difference]: With dead ends: 131 [2024-12-02 07:40:29,765 INFO L226 Difference]: Without dead ends: 131 [2024-12-02 07:40:29,765 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:40:29,765 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 136 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:29,766 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 223 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:40:29,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-12-02 07:40:29,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 118. [2024-12-02 07:40:29,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 92 states have (on average 1.4456521739130435) internal successors, (133), 117 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 07:40:29,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2024-12-02 07:40:29,769 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 17 [2024-12-02 07:40:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:29,770 INFO L471 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2024-12-02 07:40:29,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.125) internal successors, (17), 9 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2024-12-02 07:40:29,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-12-02 07:40:29,770 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:29,770 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:29,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:40:29,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:29,971 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:29,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:29,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1402119814, now seen corresponding path program 1 times [2024-12-02 07:40:29,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:29,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578811541] [2024-12-02 07:40:29,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:29,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:29,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:29,973 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:29,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 07:40:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:30,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 07:40:30,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:30,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 07:40:30,042 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 11 treesize of output 7 [2024-12-02 07:40:30,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:30,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:30,074 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:30,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:30,139 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 07:40:30,139 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:30,139 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578811541] [2024-12-02 07:40:30,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578811541] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:30,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:30,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:40:30,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409056387] [2024-12-02 07:40:30,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:30,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:40:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:30,140 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:40:30,140 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:40:30,140 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:30,521 INFO L93 Difference]: Finished difference Result 130 states and 147 transitions. [2024-12-02 07:40:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:40:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-12-02 07:40:30,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:30,522 INFO L225 Difference]: With dead ends: 130 [2024-12-02 07:40:30,522 INFO L226 Difference]: Without dead ends: 130 [2024-12-02 07:40:30,522 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:40:30,522 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 22 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:30,523 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 273 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:40:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-12-02 07:40:30,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2024-12-02 07:40:30,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 98 states have (on average 1.4387755102040816) internal successors, (141), 123 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 07:40:30,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 141 transitions. [2024-12-02 07:40:30,526 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 141 transitions. Word has length 17 [2024-12-02 07:40:30,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:30,526 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 141 transitions. [2024-12-02 07:40:30,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:30,526 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 141 transitions. [2024-12-02 07:40:30,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 07:40:30,527 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:30,527 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:30,533 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 07:40:30,727 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:30,728 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:30,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:30,728 INFO L85 PathProgramCache]: Analyzing trace with hash 983250452, now seen corresponding path program 1 times [2024-12-02 07:40:30,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:30,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [432061803] [2024-12-02 07:40:30,728 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:30,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:30,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:30,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:30,731 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 07:40:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:30,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:40:30,810 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:30,813 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 6 treesize of output 7 [2024-12-02 07:40:30,844 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 07:40:30,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-12-02 07:40:30,867 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:40:30,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 19 [2024-12-02 07:40:30,927 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 27 treesize of output 15 [2024-12-02 07:40:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:40:30,945 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:40:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:40:31,031 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:31,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432061803] [2024-12-02 07:40:31,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432061803] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:40:31,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:40:31,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2024-12-02 07:40:31,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763956125] [2024-12-02 07:40:31,032 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:40:31,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 07:40:31,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:31,033 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 07:40:31,033 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:40:31,033 INFO L87 Difference]: Start difference. First operand 124 states and 141 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:31,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:31,971 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2024-12-02 07:40:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:40:31,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 07:40:31,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:31,972 INFO L225 Difference]: With dead ends: 161 [2024-12-02 07:40:31,972 INFO L226 Difference]: Without dead ends: 161 [2024-12-02 07:40:31,973 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2024-12-02 07:40:31,973 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 210 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:31,973 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 217 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:40:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-12-02 07:40:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 130. [2024-12-02 07:40:31,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 104 states have (on average 1.4326923076923077) internal successors, (149), 129 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 07:40:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 149 transitions. [2024-12-02 07:40:31,978 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 149 transitions. Word has length 20 [2024-12-02 07:40:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:31,978 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 149 transitions. [2024-12-02 07:40:31,978 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 149 transitions. [2024-12-02 07:40:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 07:40:31,981 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:31,981 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:31,990 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 07:40:32,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:32,182 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr43REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:32,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:32,182 INFO L85 PathProgramCache]: Analyzing trace with hash 983250453, now seen corresponding path program 1 times [2024-12-02 07:40:32,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:32,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993730364] [2024-12-02 07:40:32,183 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:32,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:32,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:32,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:32,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 07:40:32,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:32,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 07:40:32,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:32,281 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 07:40:32,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:40:32,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:40:32,332 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 07:40:32,332 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:32,332 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:32,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993730364] [2024-12-02 07:40:32,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993730364] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:32,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:32,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:40:32,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212956125] [2024-12-02 07:40:32,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:32,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:40:32,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:32,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:40:32,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:40:32,333 INFO L87 Difference]: Start difference. First operand 130 states and 149 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:32,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:32,738 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2024-12-02 07:40:32,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:40:32,739 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 07:40:32,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:32,739 INFO L225 Difference]: With dead ends: 147 [2024-12-02 07:40:32,739 INFO L226 Difference]: Without dead ends: 147 [2024-12-02 07:40:32,740 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:40:32,740 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 24 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:32,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 319 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:40:32,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-12-02 07:40:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 127. [2024-12-02 07:40:32,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4257425742574257) internal successors, (144), 126 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:32,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 144 transitions. [2024-12-02 07:40:32,744 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 144 transitions. Word has length 20 [2024-12-02 07:40:32,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:32,744 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 144 transitions. [2024-12-02 07:40:32,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:32,744 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 144 transitions. [2024-12-02 07:40:32,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-12-02 07:40:32,744 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:32,745 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:32,751 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 07:40:32,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:32,945 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:32,945 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:32,945 INFO L85 PathProgramCache]: Analyzing trace with hash 1365979663, now seen corresponding path program 1 times [2024-12-02 07:40:32,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:32,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218043163] [2024-12-02 07:40:32,946 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:32,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:32,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:32,947 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:32,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 07:40:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:33,021 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-12-02 07:40:33,021 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:33,079 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 07:40:33,079 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:33,079 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:33,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218043163] [2024-12-02 07:40:33,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218043163] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:33,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:33,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:40:33,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768949250] [2024-12-02 07:40:33,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:33,080 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:40:33,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:33,080 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:40:33,080 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:40:33,081 INFO L87 Difference]: Start difference. First operand 127 states and 144 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:33,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:33,437 INFO L93 Difference]: Finished difference Result 148 states and 166 transitions. [2024-12-02 07:40:33,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:40:33,437 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-12-02 07:40:33,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:33,438 INFO L225 Difference]: With dead ends: 148 [2024-12-02 07:40:33,438 INFO L226 Difference]: Without dead ends: 148 [2024-12-02 07:40:33,438 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:40:33,438 INFO L435 NwaCegarLoop]: 99 mSDtfsCounter, 12 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:33,438 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 364 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:40:33,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-12-02 07:40:33,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 140. [2024-12-02 07:40:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 114 states have (on average 1.412280701754386) internal successors, (161), 139 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 07:40:33,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 161 transitions. [2024-12-02 07:40:33,441 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 161 transitions. Word has length 20 [2024-12-02 07:40:33,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:33,441 INFO L471 AbstractCegarLoop]: Abstraction has 140 states and 161 transitions. [2024-12-02 07:40:33,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 161 transitions. [2024-12-02 07:40:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 07:40:33,441 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:33,441 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:33,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 07:40:33,642 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:33,642 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:33,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:33,642 INFO L85 PathProgramCache]: Analyzing trace with hash 418056145, now seen corresponding path program 1 times [2024-12-02 07:40:33,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:33,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534940589] [2024-12-02 07:40:33,643 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:33,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:33,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:33,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:33,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 07:40:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:33,723 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-12-02 07:40:33,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:33,728 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 6 treesize of output 7 [2024-12-02 07:40:33,761 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 07:40:33,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-12-02 07:40:33,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:40:33,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 19 [2024-12-02 07:40:33,838 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 27 treesize of output 15 [2024-12-02 07:40:33,862 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 07:40:33,862 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:33,862 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:33,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534940589] [2024-12-02 07:40:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534940589] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:33,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:40:33,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096799813] [2024-12-02 07:40:33,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:33,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:40:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:33,863 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:40:33,863 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:40:33,864 INFO L87 Difference]: Start difference. First operand 140 states and 161 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:34,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:34,589 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2024-12-02 07:40:34,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:40:34,589 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 07:40:34,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:34,590 INFO L225 Difference]: With dead ends: 164 [2024-12-02 07:40:34,590 INFO L226 Difference]: Without dead ends: 164 [2024-12-02 07:40:34,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:40:34,591 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 181 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:34,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 173 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 07:40:34,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-12-02 07:40:34,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 144. [2024-12-02 07:40:34,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 118 states have (on average 1.4152542372881356) internal successors, (167), 143 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:34,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 167 transitions. [2024-12-02 07:40:34,593 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 167 transitions. Word has length 21 [2024-12-02 07:40:34,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:34,593 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 167 transitions. [2024-12-02 07:40:34,593 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 167 transitions. [2024-12-02 07:40:34,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-12-02 07:40:34,594 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:34,594 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:34,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 07:40:34,794 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:34,795 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr49REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:34,795 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:34,795 INFO L85 PathProgramCache]: Analyzing trace with hash 418056146, now seen corresponding path program 1 times [2024-12-02 07:40:34,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:34,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1322321124] [2024-12-02 07:40:34,795 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:34,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:34,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:34,797 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:34,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 07:40:34,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:34,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 07:40:34,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:34,886 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 6 treesize of output 7 [2024-12-02 07:40:34,890 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 6 treesize of output 5 [2024-12-02 07:40:34,956 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:40:34,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:40:34,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 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 14 treesize of output 9 [2024-12-02 07:40:34,987 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 07:40:34,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:40:35,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2024-12-02 07:40:35,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 37 treesize of output 17 [2024-12-02 07:40:35,123 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 25 treesize of output 13 [2024-12-02 07:40:35,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:40:35,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-12-02 07:40:35,167 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 07:40:35,167 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:35,167 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:35,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322321124] [2024-12-02 07:40:35,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322321124] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:35,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:35,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:40:35,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830482148] [2024-12-02 07:40:35,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:35,168 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 07:40:35,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:35,168 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 07:40:35,168 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:40:35,169 INFO L87 Difference]: Start difference. First operand 144 states and 167 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:36,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:36,172 INFO L93 Difference]: Finished difference Result 184 states and 206 transitions. [2024-12-02 07:40:36,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:40:36,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-12-02 07:40:36,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:36,174 INFO L225 Difference]: With dead ends: 184 [2024-12-02 07:40:36,174 INFO L226 Difference]: Without dead ends: 184 [2024-12-02 07:40:36,174 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-12-02 07:40:36,175 INFO L435 NwaCegarLoop]: 50 mSDtfsCounter, 181 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:36,175 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 276 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 07:40:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-12-02 07:40:36,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 146. [2024-12-02 07:40:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 120 states have (on average 1.4083333333333334) internal successors, (169), 145 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 07:40:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 169 transitions. [2024-12-02 07:40:36,178 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 169 transitions. Word has length 21 [2024-12-02 07:40:36,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:36,178 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 169 transitions. [2024-12-02 07:40:36,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 9 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:36,178 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 169 transitions. [2024-12-02 07:40:36,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 07:40:36,179 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:36,179 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:36,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 07:40:36,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:36,379 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:36,379 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:36,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1091240362, now seen corresponding path program 1 times [2024-12-02 07:40:36,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:36,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1536795565] [2024-12-02 07:40:36,380 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:36,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:36,381 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:36,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 07:40:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:36,464 INFO L256 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 07:40:36,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:36,486 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 07:40:36,486 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:36,486 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:36,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536795565] [2024-12-02 07:40:36,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536795565] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:36,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:36,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:40:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621512526] [2024-12-02 07:40:36,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:36,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:40:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:36,487 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:40:36,487 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:40:36,487 INFO L87 Difference]: Start difference. First operand 146 states and 169 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:36,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:36,757 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2024-12-02 07:40:36,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:40:36,757 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-12-02 07:40:36,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:36,758 INFO L225 Difference]: With dead ends: 162 [2024-12-02 07:40:36,758 INFO L226 Difference]: Without dead ends: 162 [2024-12-02 07:40:36,759 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 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 07:40:36,759 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 153 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:36,759 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 114 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:40:36,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-12-02 07:40:36,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 146. [2024-12-02 07:40:36,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 120 states have (on average 1.4) internal successors, (168), 145 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:36,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 168 transitions. [2024-12-02 07:40:36,763 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 168 transitions. Word has length 24 [2024-12-02 07:40:36,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:36,763 INFO L471 AbstractCegarLoop]: Abstraction has 146 states and 168 transitions. [2024-12-02 07:40:36,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:40:36,763 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 168 transitions. [2024-12-02 07:40:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 07:40:36,763 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:36,764 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:36,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 07:40:36,964 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:36,964 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr50ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:36,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:36,964 INFO L85 PathProgramCache]: Analyzing trace with hash 432891767, now seen corresponding path program 1 times [2024-12-02 07:40:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:36,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [310353674] [2024-12-02 07:40:36,965 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:36,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:36,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:36,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 07:40:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:37,047 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-12-02 07:40:37,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:37,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 07:40:37,117 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:40:37,117 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:40:37,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:40:37,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 20 treesize of output 15 [2024-12-02 07:40:37,161 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 07:40:37,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:40:37,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 39 treesize of output 19 [2024-12-02 07:40:37,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 20 treesize of output 15 [2024-12-02 07:40:37,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 21 treesize of output 20 [2024-12-02 07:40:37,301 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 27 treesize of output 15 [2024-12-02 07:40:37,306 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:40:37,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 7 [2024-12-02 07:40:37,358 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 07:40:37,358 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:40:37,358 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:40:37,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310353674] [2024-12-02 07:40:37,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310353674] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:40:37,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:40:37,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-12-02 07:40:37,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871194773] [2024-12-02 07:40:37,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:40:37,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 07:40:37,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:40:37,359 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 07:40:37,359 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:40:37,359 INFO L87 Difference]: Start difference. First operand 146 states and 168 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 07:40:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:40:38,414 INFO L93 Difference]: Finished difference Result 200 states and 225 transitions. [2024-12-02 07:40:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:40:38,415 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-12-02 07:40:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:40:38,416 INFO L225 Difference]: With dead ends: 200 [2024-12-02 07:40:38,416 INFO L226 Difference]: Without dead ends: 200 [2024-12-02 07:40:38,416 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-12-02 07:40:38,416 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 136 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:40:38,416 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 428 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 07:40:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-12-02 07:40:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2024-12-02 07:40:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 132 states have (on average 1.371212121212121) internal successors, (181), 157 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 07:40:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 181 transitions. [2024-12-02 07:40:38,419 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 181 transitions. Word has length 25 [2024-12-02 07:40:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:40:38,419 INFO L471 AbstractCegarLoop]: Abstraction has 158 states and 181 transitions. [2024-12-02 07:40:38,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 07:40:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 181 transitions. [2024-12-02 07:40:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 07:40:38,420 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:40:38,420 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:40:38,426 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-12-02 07:40:38,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:38,621 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:40:38,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:40:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash 562291380, now seen corresponding path program 1 times [2024-12-02 07:40:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:40:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208781614] [2024-12-02 07:40:38,622 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:40:38,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:40:38,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:40:38,623 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:40:38,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 07:40:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:40:38,724 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-12-02 07:40:38,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:40:38,730 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 6 treesize of output 7 [2024-12-02 07:40:38,739 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 07:40:38,743 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 07:40:38,763 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:38,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:38,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:38,788 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 27 treesize of output 11 [2024-12-02 07:40:38,833 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:40:38,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:40:38,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:40:38,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:40:38,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 31 treesize of output 19 [2024-12-02 07:40:38,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 31 treesize of output 19 [2024-12-02 07:40:38,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 45 [2024-12-02 07:40:38,921 INFO L349 Elim1Store]: treesize reduction 63, result has 14.9 percent of original size [2024-12-02 07:40:38,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 40 [2024-12-02 07:40:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:40:50,129 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:41:02,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:41:02,635 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:41:02,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208781614] [2024-12-02 07:41:02,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208781614] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:41:02,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:41:02,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2024-12-02 07:41:02,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212513794] [2024-12-02 07:41:02,635 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:41:02,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:41:02,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:41:02,636 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:41:02,636 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=259, Unknown=2, NotChecked=0, Total=306 [2024-12-02 07:41:02,636 INFO L87 Difference]: Start difference. First operand 158 states and 181 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:41:10,598 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:20,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:26,653 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:31,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:40,401 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:45,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:49,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:57,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-12-02 07:41:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:41:58,407 INFO L93 Difference]: Finished difference Result 185 states and 209 transitions. [2024-12-02 07:41:58,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:41:58,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-12-02 07:41:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:41:58,409 INFO L225 Difference]: With dead ends: 185 [2024-12-02 07:41:58,409 INFO L226 Difference]: Without dead ends: 185 [2024-12-02 07:41:58,409 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 32.7s TimeCoverageRelationStatistics Valid=92, Invalid=556, Unknown=2, NotChecked=0, Total=650 [2024-12-02 07:41:58,410 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 128 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 17 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 44.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 45.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:41:58,410 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 580 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 886 Invalid, 8 Unknown, 0 Unchecked, 45.2s Time] [2024-12-02 07:41:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2024-12-02 07:41:58,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 161. [2024-12-02 07:41:58,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 135 states have (on average 1.362962962962963) internal successors, (184), 160 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:41:58,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 184 transitions. [2024-12-02 07:41:58,413 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 184 transitions. Word has length 26 [2024-12-02 07:41:58,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:41:58,413 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 184 transitions. [2024-12-02 07:41:58,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:41:58,413 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 184 transitions. [2024-12-02 07:41:58,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 07:41:58,414 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:41:58,414 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:41:58,422 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-12-02 07:41:58,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:58,615 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr42REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:41:58,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:41:58,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1792210484, now seen corresponding path program 1 times [2024-12-02 07:41:58,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:41:58,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589149477] [2024-12-02 07:41:58,615 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:41:58,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:41:58,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:41:58,617 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:41:58,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-12-02 07:41:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:41:58,708 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 07:41:58,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:41:59,566 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 07:41:59,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 23 treesize of output 11 [2024-12-02 07:42:00,261 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 07:42:00,261 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:42:00,261 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:42:00,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589149477] [2024-12-02 07:42:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589149477] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:42:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:42:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 07:42:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344522740] [2024-12-02 07:42:00,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:42:00,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:42:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:42:00,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:42:00,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:42:00,263 INFO L87 Difference]: Start difference. First operand 161 states and 184 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 07:42:04,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:42:04,135 INFO L93 Difference]: Finished difference Result 212 states and 235 transitions. [2024-12-02 07:42:04,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:42:04,136 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) Word has length 26 [2024-12-02 07:42:04,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:42:04,137 INFO L225 Difference]: With dead ends: 212 [2024-12-02 07:42:04,137 INFO L226 Difference]: Without dead ends: 212 [2024-12-02 07:42:04,137 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-12-02 07:42:04,138 INFO L435 NwaCegarLoop]: 88 mSDtfsCounter, 154 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:42:04,138 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 363 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-12-02 07:42:04,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-12-02 07:42:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 166. [2024-12-02 07:42:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.35) internal successors, (189), 165 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 07:42:04,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 189 transitions. [2024-12-02 07:42:04,143 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 189 transitions. Word has length 26 [2024-12-02 07:42:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:42:04,143 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 189 transitions. [2024-12-02 07:42:04,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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 07:42:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 189 transitions. [2024-12-02 07:42:04,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:42:04,144 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:42:04,144 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:42:04,151 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-12-02 07:42:04,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:04,344 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:42:04,344 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:42:04,344 INFO L85 PathProgramCache]: Analyzing trace with hash -604585791, now seen corresponding path program 1 times [2024-12-02 07:42:04,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:42:04,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [441791052] [2024-12-02 07:42:04,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:42:04,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:42:04,346 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:42:04,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-12-02 07:42:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:42:04,435 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-12-02 07:42:04,436 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:42:04,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:42:04,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 28 treesize of output 12 [2024-12-02 07:42:05,039 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 16 treesize of output 8 [2024-12-02 07:42:05,312 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 07:42:05,312 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:42:05,312 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:42:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441791052] [2024-12-02 07:42:05,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441791052] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:42:05,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:42:05,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:42:05,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048412385] [2024-12-02 07:42:05,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:42:05,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:42:05,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:42:05,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:42:05,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:42:05,314 INFO L87 Difference]: Start difference. First operand 166 states and 189 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:42:09,058 INFO L93 Difference]: Finished difference Result 201 states and 220 transitions. [2024-12-02 07:42:09,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 07:42:09,059 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:42:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:42:09,060 INFO L225 Difference]: With dead ends: 201 [2024-12-02 07:42:09,060 INFO L226 Difference]: Without dead ends: 201 [2024-12-02 07:42:09,060 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:42:09,061 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 208 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:42:09,061 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 287 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2024-12-02 07:42:09,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-12-02 07:42:09,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 166. [2024-12-02 07:42:09,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 140 states have (on average 1.3357142857142856) internal successors, (187), 165 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2024-12-02 07:42:09,066 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 27 [2024-12-02 07:42:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:42:09,066 INFO L471 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2024-12-02 07:42:09,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:09,066 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2024-12-02 07:42:09,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-12-02 07:42:09,066 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:42:09,066 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:42:09,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-12-02 07:42:09,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:09,267 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr48REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:42:09,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:42:09,267 INFO L85 PathProgramCache]: Analyzing trace with hash 278113049, now seen corresponding path program 1 times [2024-12-02 07:42:09,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:42:09,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1435055802] [2024-12-02 07:42:09,268 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:42:09,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:09,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:42:09,269 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:42:09,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-12-02 07:42:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:42:09,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 07:42:09,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:42:09,951 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 07:42:10,020 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 07:42:10,807 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 07:42:10,851 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 07:42:11,785 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 07:42:11,785 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:42:11,785 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:42:11,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435055802] [2024-12-02 07:42:11,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435055802] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:42:11,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:42:11,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 07:42:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567945528] [2024-12-02 07:42:11,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:42:11,786 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:42:11,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:42:11,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:42:11,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:42:11,787 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:18,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:42:18,594 INFO L93 Difference]: Finished difference Result 192 states and 211 transitions. [2024-12-02 07:42:18,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 07:42:18,595 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 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 07:42:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:42:18,596 INFO L225 Difference]: With dead ends: 192 [2024-12-02 07:42:18,596 INFO L226 Difference]: Without dead ends: 192 [2024-12-02 07:42:18,596 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-12-02 07:42:18,597 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 53 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2024-12-02 07:42:18,597 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 397 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2024-12-02 07:42:18,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-12-02 07:42:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 172. [2024-12-02 07:42:18,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 146 states have (on average 1.321917808219178) internal successors, (193), 171 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2024-12-02 07:42:18,602 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 27 [2024-12-02 07:42:18,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:42:18,602 INFO L471 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2024-12-02 07:42:18,602 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2024-12-02 07:42:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:42:18,603 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:42:18,603 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:42:18,610 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-12-02 07:42:18,803 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:18,803 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:42:18,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:42:18,804 INFO L85 PathProgramCache]: Analyzing trace with hash -403137396, now seen corresponding path program 1 times [2024-12-02 07:42:18,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:42:18,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509411760] [2024-12-02 07:42:18,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:42:18,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:18,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:42:18,805 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:42:18,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-12-02 07:42:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:42:18,914 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 07:42:18,916 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:42:18,941 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 6 treesize of output 7 [2024-12-02 07:42:19,491 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:42:19,491 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:42:19,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:42:20,400 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:42:20,400 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-12-02 07:42:21,050 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:42:21,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-12-02 07:42:21,451 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:42:21,451 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-12-02 07:42:22,291 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 27 treesize of output 15 [2024-12-02 07:42:22,783 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 07:42:22,783 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:42:24,069 INFO L349 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2024-12-02 07:42:24,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2024-12-02 07:42:24,111 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_787) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.base|)) is different from false [2024-12-02 07:42:24,162 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_787 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_ULTIMATE.start_main_#t~mem5#1.base| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_787) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) is different from false [2024-12-02 07:42:24,641 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_785 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_787 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_785))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_787) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) .cse1)))) is different from false [2024-12-02 07:42:24,705 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_785 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_787 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_785))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_787) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) .cse1)))) is different from false [2024-12-02 07:42:24,785 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:24,786 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2024-12-02 07:42:24,901 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:24,902 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 330 treesize of output 265 [2024-12-02 07:42:25,042 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:25,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 59 [2024-12-02 07:42:25,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 68 [2024-12-02 07:42:30,572 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 07:42:30,572 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:42:30,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509411760] [2024-12-02 07:42:30,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509411760] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:42:30,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:42:30,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2024-12-02 07:42:30,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491434397] [2024-12-02 07:42:30,573 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:42:30,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 07:42:30,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:42:30,574 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 07:42:30,574 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=16, NotChecked=148, Total=506 [2024-12-02 07:42:30,574 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:44,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:42:44,623 INFO L93 Difference]: Finished difference Result 254 states and 283 transitions. [2024-12-02 07:42:44,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-12-02 07:42:44,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 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 29 [2024-12-02 07:42:44,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:42:44,625 INFO L225 Difference]: With dead ends: 254 [2024-12-02 07:42:44,625 INFO L226 Difference]: Without dead ends: 254 [2024-12-02 07:42:44,625 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=198, Invalid=916, Unknown=24, NotChecked=268, Total=1406 [2024-12-02 07:42:44,626 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 440 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 91 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 1796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 882 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:42:44,626 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 411 Invalid, 1796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 808 Invalid, 15 Unknown, 882 Unchecked, 10.4s Time] [2024-12-02 07:42:44,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-12-02 07:42:44,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 193. [2024-12-02 07:42:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 167 states have (on average 1.311377245508982) internal successors, (219), 192 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 219 transitions. [2024-12-02 07:42:44,630 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 219 transitions. Word has length 29 [2024-12-02 07:42:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:42:44,630 INFO L471 AbstractCegarLoop]: Abstraction has 193 states and 219 transitions. [2024-12-02 07:42:44,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:42:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 219 transitions. [2024-12-02 07:42:44,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:42:44,630 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:42:44,630 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:42:44,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-12-02 07:42:44,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:44,831 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:42:44,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:42:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash -403137395, now seen corresponding path program 1 times [2024-12-02 07:42:44,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:42:44,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [865753174] [2024-12-02 07:42:44,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:42:44,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:42:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:42:44,833 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:42:44,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-12-02 07:42:44,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:42:44,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-12-02 07:42:44,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:42:45,456 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:42:45,456 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:42:45,525 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 6 treesize of output 5 [2024-12-02 07:42:45,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 07:42:45,930 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:42:46,803 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:42:46,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:42:46,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:42:47,760 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:42:47,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-12-02 07:42:47,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:42:47,861 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 16 treesize of output 11 [2024-12-02 07:42:48,021 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:42:48,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:42:48,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:42:49,089 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 25 treesize of output 13 [2024-12-02 07:42:49,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-12-02 07:42:49,669 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 07:42:49,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:42:52,262 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_844) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0))))) is different from false [2024-12-02 07:42:52,355 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_844) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2024-12-02 07:42:52,564 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_839 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_839) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_840) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse0 (bvadd .cse0 (_ bv4 32))))) (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_839 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_840))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (bvule (bvadd (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_839) .cse1 v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv4 32)) (select |c_#length| (select (select (store .cse2 .cse1 v_ArrVal_844) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))) is different from false [2024-12-02 07:42:52,714 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_839 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_839) (select (select (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_840) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse0 (bvadd (_ bv4 32) .cse0)))) (forall ((v_ArrVal_840 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_839 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_840))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (bvule (bvadd (_ bv4 32) (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_839) .cse2 v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store .cse3 .cse2 v_ArrVal_844) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))))) is different from false [2024-12-02 07:42:52,841 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:52,841 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 64 [2024-12-02 07:42:52,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:52,892 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 48 [2024-12-02 07:42:52,916 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 80 treesize of output 68 [2024-12-02 07:42:53,038 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:53,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 119 [2024-12-02 07:42:53,077 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 74 treesize of output 66 [2024-12-02 07:42:53,103 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 96 treesize of output 84 [2024-12-02 07:42:53,132 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 58 treesize of output 54 [2024-12-02 07:42:53,647 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:53,648 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 74 [2024-12-02 07:42:53,707 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:42:53,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 50 [2024-12-02 07:42:53,722 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:42:53,722 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:42:53,736 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 50 [2024-12-02 07:42:53,750 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:42:53,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-12-02 07:42:55,123 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 07:42:55,123 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:42:55,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865753174] [2024-12-02 07:42:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865753174] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:42:55,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:42:55,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2024-12-02 07:42:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655690332] [2024-12-02 07:42:55,123 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:42:55,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 07:42:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:42:55,124 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 07:42:55,124 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=320, Unknown=9, NotChecked=156, Total=552 [2024-12-02 07:42:55,124 INFO L87 Difference]: Start difference. First operand 193 states and 219 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 07:43:07,832 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (let ((.cse0 (bvadd (_ bv4 32) .cse3)) (.cse2 (bvadd (_ bv4 32) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_844 (Array (_ BitVec 32) (_ BitVec 32)))) (bvule (bvadd (_ bv4 32) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_844) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (bvule .cse0 (select |c_#length| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_843 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_843) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule .cse1 (bvadd (_ bv4 32) .cse1)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|))) (bvule .cse2 (select |c_#length| |c_ULTIMATE.start_main_~x~0#1.base|)) (bvule .cse3 .cse0) (bvule |c_ULTIMATE.start_main_~x~0#1.offset| .cse2)))) is different from false [2024-12-02 07:43:20,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:43:20,281 INFO L93 Difference]: Finished difference Result 330 states and 365 transitions. [2024-12-02 07:43:20,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-12-02 07:43:20,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2024-12-02 07:43:20,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:43:20,284 INFO L225 Difference]: With dead ends: 330 [2024-12-02 07:43:20,284 INFO L226 Difference]: Without dead ends: 330 [2024-12-02 07:43:20,284 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=220, Invalid=1042, Unknown=18, NotChecked=360, Total=1640 [2024-12-02 07:43:20,285 INFO L435 NwaCegarLoop]: 85 mSDtfsCounter, 300 mSDsluCounter, 707 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 63 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 2310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 976 IncrementalHoareTripleChecker+Unchecked, 18.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:43:20,285 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 792 Invalid, 2310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1258 Invalid, 13 Unknown, 976 Unchecked, 18.9s Time] [2024-12-02 07:43:20,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-12-02 07:43:20,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 204. [2024-12-02 07:43:20,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 181 states have (on average 1.270718232044199) internal successors, (230), 203 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:43:20,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 230 transitions. [2024-12-02 07:43:20,289 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 230 transitions. Word has length 29 [2024-12-02 07:43:20,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:43:20,289 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 230 transitions. [2024-12-02 07:43:20,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 24 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 07:43:20,289 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 230 transitions. [2024-12-02 07:43:20,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-12-02 07:43:20,290 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:43:20,290 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:43:20,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-12-02 07:43:20,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:43:20,490 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr56ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:43:20,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:43:20,491 INFO L85 PathProgramCache]: Analyzing trace with hash 153789796, now seen corresponding path program 1 times [2024-12-02 07:43:20,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:43:20,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461619347] [2024-12-02 07:43:20,491 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:43:20,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:43:20,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:43:20,492 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:43:20,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-12-02 07:43:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:43:20,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 07:43:20,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:43:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:43:21,185 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:43:21,185 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:43:21,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461619347] [2024-12-02 07:43:21,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461619347] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:43:21,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:43:21,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:43:21,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21443350] [2024-12-02 07:43:21,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:43:21,185 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:43:21,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:43:21,186 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:43:21,186 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:43:21,186 INFO L87 Difference]: Start difference. First operand 204 states and 230 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 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 07:43:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:43:22,633 INFO L93 Difference]: Finished difference Result 213 states and 238 transitions. [2024-12-02 07:43:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:43:22,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 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) Word has length 32 [2024-12-02 07:43:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:43:22,635 INFO L225 Difference]: With dead ends: 213 [2024-12-02 07:43:22,635 INFO L226 Difference]: Without dead ends: 213 [2024-12-02 07:43:22,635 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:43:22,636 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 141 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:43:22,636 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 103 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-12-02 07:43:22,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2024-12-02 07:43:22,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 204. [2024-12-02 07:43:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 181 states have (on average 1.2651933701657458) internal successors, (229), 203 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:43:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 229 transitions. [2024-12-02 07:43:22,639 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 229 transitions. Word has length 32 [2024-12-02 07:43:22,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:43:22,639 INFO L471 AbstractCegarLoop]: Abstraction has 204 states and 229 transitions. [2024-12-02 07:43:22,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 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 07:43:22,639 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 229 transitions. [2024-12-02 07:43:22,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 07:43:22,639 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:43:22,640 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:43:22,651 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-12-02 07:43:22,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:43:22,840 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:43:22,840 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:43:22,840 INFO L85 PathProgramCache]: Analyzing trace with hash -956700098, now seen corresponding path program 1 times [2024-12-02 07:43:22,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:43:22,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1462620878] [2024-12-02 07:43:22,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:43:22,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:43:22,841 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:43:22,842 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:43:22,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-12-02 07:43:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:43:22,972 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-12-02 07:43:22,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:43:23,510 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:43:23,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:43:23,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:43:24,410 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:43:24,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-12-02 07:43:25,136 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:43:25,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-12-02 07:43:25,524 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:43:25,524 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 35 [2024-12-02 07:43:26,363 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 27 treesize of output 15 [2024-12-02 07:43:26,841 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 07:43:26,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-12-02 07:43:27,210 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 07:43:27,210 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:43:28,972 INFO L349 Elim1Store]: treesize reduction 7, result has 58.8 percent of original size [2024-12-02 07:43:28,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2024-12-02 07:43:29,025 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_955 (Array (_ BitVec 32) (_ BitVec 32)))) (= (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_955) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) |c_ULTIMATE.start_main_~x~0#1.base|)) is different from false [2024-12-02 07:43:30,011 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_953 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_955 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_953))) (let ((.cse1 (select (select .cse0 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= (select (select (store .cse0 .cse1 v_ArrVal_955) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) .cse1)))) is different from false [2024-12-02 07:43:30,067 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_953 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_955 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse1 (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_953))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (= .cse0 (select (select (store .cse1 .cse0 v_ArrVal_955) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 07:43:30,150 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:43:30,151 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 36 [2024-12-02 07:43:30,274 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:43:30,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 408 treesize of output 343 [2024-12-02 07:43:30,313 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 287 treesize of output 271 [2024-12-02 07:43:30,446 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:43:30,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 271 treesize of output 247 [2024-12-02 07:43:32,148 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 07:43:32,149 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:43:32,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462620878] [2024-12-02 07:43:32,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462620878] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:43:32,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:43:32,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2024-12-02 07:43:32,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175369994] [2024-12-02 07:43:32,149 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:43:32,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-12-02 07:43:32,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:43:32,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-12-02 07:43:32,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=314, Unknown=22, NotChecked=114, Total=506 [2024-12-02 07:43:32,150 INFO L87 Difference]: Start difference. First operand 204 states and 229 transitions. Second operand has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:43:52,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:43:52,941 INFO L93 Difference]: Finished difference Result 316 states and 349 transitions. [2024-12-02 07:43:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 07:43:52,942 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-12-02 07:43:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:43:52,942 INFO L225 Difference]: With dead ends: 316 [2024-12-02 07:43:52,942 INFO L226 Difference]: Without dead ends: 316 [2024-12-02 07:43:52,943 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=208, Invalid=1034, Unknown=30, NotChecked=210, Total=1482 [2024-12-02 07:43:52,943 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 324 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 1340 mSolverCounterSat, 57 mSolverCounterUnsat, 17 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1340 IncrementalHoareTripleChecker+Invalid, 17 IncrementalHoareTripleChecker+Unknown, 740 IncrementalHoareTripleChecker+Unchecked, 16.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:43:52,943 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [324 Valid, 753 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1340 Invalid, 17 Unknown, 740 Unchecked, 16.5s Time] [2024-12-02 07:43:52,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-12-02 07:43:52,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 211. [2024-12-02 07:43:52,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 189 states have (on average 1.2592592592592593) internal successors, (238), 210 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 07:43:52,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 238 transitions. [2024-12-02 07:43:52,947 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 238 transitions. Word has length 34 [2024-12-02 07:43:52,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:43:52,947 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 238 transitions. [2024-12-02 07:43:52,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:43:52,947 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 238 transitions. [2024-12-02 07:43:52,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 07:43:52,948 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:43:52,948 INFO L218 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:43:52,959 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-12-02 07:43:53,148 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:43:53,148 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr37REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:43:53,149 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:43:53,149 INFO L85 PathProgramCache]: Analyzing trace with hash -956700097, now seen corresponding path program 1 times [2024-12-02 07:43:53,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:43:53,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699156854] [2024-12-02 07:43:53,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:43:53,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:43:53,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:43:53,151 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:43:53,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-12-02 07:43:53,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:43:53,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 07:43:53,303 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:43:53,323 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 6 treesize of output 7 [2024-12-02 07:43:53,827 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 6 treesize of output 5 [2024-12-02 07:43:53,972 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:43:53,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:43:54,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:43:54,242 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 07:43:55,182 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:43:55,183 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:43:55,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:43:56,252 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:43:56,253 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-12-02 07:43:56,320 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 07:43:56,474 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:43:56,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 24 [2024-12-02 07:43:56,816 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:43:56,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 45 [2024-12-02 07:43:56,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 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 24 treesize of output 11 [2024-12-02 07:43:57,901 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 25 treesize of output 13 [2024-12-02 07:43:57,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 7 treesize of output 3 [2024-12-02 07:43:58,341 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 07:43:58,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 07:43:58,980 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 07:43:58,980 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:44:02,374 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1033 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ BitVec 32))) (bvule (bvadd (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv8 32)) (select (store |c_#length| |v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ bv12 32)) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1033) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd .cse0 (_ bv4 32)) (bvadd .cse0 (_ bv8 32)))))) is different from false [2024-12-02 07:44:02,565 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1033 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ bv12 32)) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem5#1.base| v_ArrVal_1033) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 07:44:02,692 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1033 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ BitVec 32))) (bvule (bvadd (_ bv8 32) (select (select (store |c_#memory_$Pointer$#1.offset| .cse1 v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ bv12 32)) (select (select (store |c_#memory_$Pointer$#1.base| .cse1 v_ArrVal_1033) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2024-12-02 07:44:02,965 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1030 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1029 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1029) (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1030) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse0) (bvadd (_ bv8 32) .cse0)))) (forall ((v_ArrVal_1030 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1033 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1029 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1030))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1029) .cse1 v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ bv12 32)) (select (select (store .cse2 .cse1 v_ArrVal_1033) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))))) is different from false [2024-12-02 07:44:03,223 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_1030 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1033 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1029 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ BitVec 32))) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_1030))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (bvule (bvadd (_ bv8 32) (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_1029) .cse1 v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (store |c_#length| |v_ULTIMATE.start_main_#t~malloc12#1.base_12| (_ bv12 32)) (select (select (store .cse2 .cse1 v_ArrVal_1033) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((v_ArrVal_1030 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1034 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1029 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse3 (select (select (store (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_1029) (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_1030) |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|) v_ArrVal_1034) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (bvule (bvadd (_ bv4 32) .cse3) (bvadd (_ bv8 32) .cse3)))))) is different from false [2024-12-02 07:44:03,366 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:03,367 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 77 [2024-12-02 07:44:03,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:03,418 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 53 [2024-12-02 07:44:03,548 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:03,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 680 treesize of output 615 [2024-12-02 07:44:03,768 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:03,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2071 treesize of output 1982 [2024-12-02 07:44:03,816 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 619 treesize of output 595 [2024-12-02 07:44:03,852 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 595 treesize of output 571 [2024-12-02 07:44:03,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:03,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 571 treesize of output 527 [2024-12-02 07:44:04,017 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 519 treesize of output 511 [2024-12-02 07:44:36,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:36,287 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 66 [2024-12-02 07:44:36,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:36,345 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 50 [2024-12-02 07:44:36,376 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 84 treesize of output 72 [2024-12-02 07:44:36,527 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:44:36,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 232 treesize of output 215 [2024-12-02 07:44:36,564 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 78 treesize of output 74 [2024-12-02 07:44:36,597 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 74 treesize of output 70 [2024-12-02 07:44:36,622 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 104 treesize of output 92 [2024-12-02 07:44:41,215 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 07:44:41,215 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 07:44:41,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699156854] [2024-12-02 07:44:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699156854] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:44:41,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:44:41,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2024-12-02 07:44:41,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434776301] [2024-12-02 07:44:41,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:44:41,216 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-12-02 07:44:41,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 07:44:41,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-12-02 07:44:41,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=291, Unknown=5, NotChecked=190, Total=552 [2024-12-02 07:44:41,217 INFO L87 Difference]: Start difference. First operand 211 states and 238 transitions. Second operand has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 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 07:45:10,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:45:10,475 INFO L93 Difference]: Finished difference Result 307 states and 340 transitions. [2024-12-02 07:45:10,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 07:45:10,477 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 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 34 [2024-12-02 07:45:10,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:45:10,478 INFO L225 Difference]: With dead ends: 307 [2024-12-02 07:45:10,478 INFO L226 Difference]: Without dead ends: 307 [2024-12-02 07:45:10,478 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=217, Invalid=920, Unknown=5, NotChecked=340, Total=1482 [2024-12-02 07:45:10,478 INFO L435 NwaCegarLoop]: 86 mSDtfsCounter, 280 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 2386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1153 IncrementalHoareTripleChecker+Unchecked, 21.9s IncrementalHoareTripleChecker+Time [2024-12-02 07:45:10,479 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 707 Invalid, 2386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1192 Invalid, 0 Unknown, 1153 Unchecked, 21.9s Time] [2024-12-02 07:45:10,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2024-12-02 07:45:10,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 210. [2024-12-02 07:45:10,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 189 states have (on average 1.2486772486772486) internal successors, (236), 209 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:45:10,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 236 transitions. [2024-12-02 07:45:10,482 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 236 transitions. Word has length 34 [2024-12-02 07:45:10,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:45:10,482 INFO L471 AbstractCegarLoop]: Abstraction has 210 states and 236 transitions. [2024-12-02 07:45:10,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.739130434782609) internal successors, (63), 24 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 07:45:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 236 transitions. [2024-12-02 07:45:10,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 07:45:10,483 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:45:10,483 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:45:10,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-12-02 07:45:10,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:45:10,683 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr24REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 56 more)] === [2024-12-02 07:45:10,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:45:10,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1840791617, now seen corresponding path program 2 times [2024-12-02 07:45:10,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 07:45:10,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197689067] [2024-12-02 07:45:10,684 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 07:45:10,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:45:10,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:45:10,685 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:45:10,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_45d280e4-f348-4f37-aeb5-c112843fd213/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-12-02 07:45:10,925 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 07:45:10,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 07:45:10,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-12-02 07:45:10,931 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:45:10,951 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 6 treesize of output 7 [2024-12-02 07:45:11,510 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 07:45:11,510 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-12-02 07:45:11,677 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 15 treesize of output 1 [2024-12-02 07:45:11,772 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-12-02 07:45:12,425 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 07:45:12,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 38 [2024-12-02 07:45:12,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 16 treesize of output 1 [2024-12-02 07:45:13,260 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:45:13,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-12-02 07:45:13,304 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 07:45:13,482 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 07:45:13,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 17 [2024-12-02 07:45:13,803 INFO L349 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2024-12-02 07:45:13,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 41 [2024-12-02 07:45:13,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2024-12-02 07:45:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:45:16,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:45:22,966 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:22,967 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 37 [2024-12-02 07:45:23,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:23,012 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 31 [2024-12-02 07:45:23,129 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:23,129 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 34 [2024-12-02 07:45:23,174 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:23,174 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2024-12-02 07:45:25,813 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1087 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1088 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1088))) (let ((.cse0 (select (select .cse4 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (not (= (select v_arrayElimArr_11 .cse0) (_ bv0 32))) (= (_ bv0 32) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1087))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse1 (store .cse4 .cse3 v_arrayElimArr_12))) (select (select .cse1 (select (select (store .cse2 .cse3 v_arrayElimArr_11) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (not (= (_ bv0 32) (select v_arrayElimArr_12 .cse0))))))) (forall ((v_ArrVal_1087 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1088 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_14 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_13 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse8 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1088))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (= (_ bv0 32) (let ((.cse6 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1087))) (let ((.cse7 (select (select .cse6 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (select (let ((.cse5 (store .cse6 .cse7 v_arrayElimArr_13))) (select .cse5 (select (select .cse5 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store .cse8 .cse7 v_arrayElimArr_14) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (not (= (_ bv0 32) (select v_arrayElimArr_14 .cse9))) (not (= (_ bv0 32) (select v_arrayElimArr_13 .cse9)))))))) is different from false [2024-12-02 07:45:26,052 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse5 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_1087 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1088 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_11 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_12 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse4 (store |c_#memory_$Pointer$#1.offset| .cse5 v_ArrVal_1088))) (let ((.cse0 (select (select .cse4 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (not (= (select v_arrayElimArr_12 .cse0) (_ bv0 32))) (not (= (_ bv0 32) (select v_arrayElimArr_11 .cse0))) (= (_ bv0 32) (let ((.cse2 (store |c_#memory_$Pointer$#1.base| .cse5 v_ArrVal_1087))) (let ((.cse3 (select (select .cse2 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (let ((.cse1 (store .cse4 .cse3 v_arrayElimArr_12))) (select (select .cse1 (select (select (store .cse2 .cse3 v_arrayElimArr_11) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (select (select .cse1 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))))))) (forall ((v_ArrVal_1087 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_1088 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_14 (Array (_ BitVec 32) (_ BitVec 32))) (v_arrayElimArr_13 (Array (_ BitVec 32) (_ BitVec 32)))) (let ((.cse10 (store |c_#memory_$Pointer$#1.offset| .cse5 v_ArrVal_1088))) (let ((.cse6 (select (select .cse10 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (or (not (= (_ bv0 32) (select v_arrayElimArr_13 .cse6))) (= (_ bv0 32) (let ((.cse8 (store |c_#memory_$Pointer$#1.base| .cse5 v_ArrVal_1087))) (let ((.cse9 (select (select .cse8 |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (select (let ((.cse7 (store .cse8 .cse9 v_arrayElimArr_13))) (select .cse7 (select (select .cse7 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (select (select (store .cse10 .cse9 v_arrayElimArr_14) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (not (= (select v_arrayElimArr_14 .cse6) (_ bv0 32))))))))) is different from false [2024-12-02 07:45:26,298 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:26,298 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 145 treesize of output 129 [2024-12-02 07:45:26,348 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:26,349 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 63 [2024-12-02 07:45:31,594 WARN L286 SmtUtils]: Spent 5.19s on a formula simplification. DAG size of input: 128 DAG size of output: 110 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-12-02 07:45:31,595 INFO L349 Elim1Store]: treesize reduction 154, result has 69.8 percent of original size [2024-12-02 07:45:31,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 10 new quantified variables, introduced 28 case distinctions, treesize of input 1860 treesize of output 1739 [2024-12-02 07:45:31,973 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:31,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 2823 treesize of output 2622 [2024-12-02 07:45:32,193 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:32,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1129 treesize of output 1109 [2024-12-02 07:45:32,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:32,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1409 treesize of output 1363 [2024-12-02 07:45:32,925 INFO L224 Elim1Store]: Index analysis took 237 ms [2024-12-02 07:45:33,746 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:33,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1265 treesize of output 1197 [2024-12-02 07:45:34,204 INFO L224 Elim1Store]: Index analysis took 365 ms [2024-12-02 07:45:35,472 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:45:35,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 857 treesize of output 901