./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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 b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 11:53:52,847 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 11:53:52,922 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 11:53:52,929 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 11:53:52,929 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 11:53:52,956 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 11:53:52,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 11:53:52,957 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 11:53:52,957 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 11:53:52,957 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 11:53:52,958 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 11:53:52,958 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 11:53:52,958 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 11:53:52,958 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 11:53:52,958 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 11:53:52,959 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 11:53:52,959 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 11:53:52,960 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:53:52,960 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:53:52,961 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:53:52,961 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 11:53:52,961 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 11:53:52,962 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 11:53:52,962 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 11:53:52,962 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 11:53:52,962 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 11:53:52,962 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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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 -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2024-12-02 11:53:53,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 11:53:53,295 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 11:53:53,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 11:53:53,299 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 11:53:53,300 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 11:53:53,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2024-12-02 11:53:56,833 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/9939e626b/74db002c1cc04f5fbbd170b7bb89a185/FLAG602263f80 [2024-12-02 11:53:57,142 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 11:53:57,143 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2024-12-02 11:53:57,158 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/9939e626b/74db002c1cc04f5fbbd170b7bb89a185/FLAG602263f80 [2024-12-02 11:53:57,428 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/9939e626b/74db002c1cc04f5fbbd170b7bb89a185 [2024-12-02 11:53:57,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 11:53:57,433 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 11:53:57,435 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 11:53:57,435 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 11:53:57,441 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 11:53:57,442 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,443 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@673c0fd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57, skipping insertion in model container [2024-12-02 11:53:57,443 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,481 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 11:53:57,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:53:57,780 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 11:53:57,831 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 11:53:57,856 INFO L204 MainTranslator]: Completed translation [2024-12-02 11:53:57,856 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57 WrapperNode [2024-12-02 11:53:57,857 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 11:53:57,858 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 11:53:57,858 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 11:53:57,858 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 11:53:57,864 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,899 INFO L138 Inliner]: procedures = 119, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 110 [2024-12-02 11:53:57,899 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 11:53:57,900 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 11:53:57,900 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 11:53:57,900 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 11:53:57,910 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,910 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,913 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,927 INFO L175 MemorySlicer]: Split 22 memory accesses to 2 slices as follows [2, 20]. 91 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 10 writes are split as follows [0, 10]. [2024-12-02 11:53:57,927 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,927 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,936 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,937 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,942 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,944 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,948 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 11:53:57,948 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 11:53:57,949 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 11:53:57,949 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 11:53:57,950 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (1/1) ... [2024-12-02 11:53:57,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 11:53:57,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:53:57,980 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 11:53:57,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 11:53:58,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 11:53:58,011 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 11:53:58,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 11:53:58,136 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 11:53:58,138 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 11:53:58,514 INFO L? ?]: Removed 99 outVars from TransFormulas that were not future-live. [2024-12-02 11:53:58,515 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 11:53:58,526 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 11:53:58,527 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-12-02 11:53:58,527 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:53:58 BoogieIcfgContainer [2024-12-02 11:53:58,527 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 11:53:58,530 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 11:53:58,530 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 11:53:58,536 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 11:53:58,536 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 11:53:57" (1/3) ... [2024-12-02 11:53:58,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313fd7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:53:58, skipping insertion in model container [2024-12-02 11:53:58,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 11:53:57" (2/3) ... [2024-12-02 11:53:58,537 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313fd7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 11:53:58, skipping insertion in model container [2024-12-02 11:53:58,537 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 11:53:58" (3/3) ... [2024-12-02 11:53:58,539 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2024-12-02 11:53:58,559 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 11:53:58,561 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-simple-white-blue-1.i that has 1 procedures, 106 locations, 1 initial locations, 6 loop locations, and 45 error locations. [2024-12-02 11:53:58,611 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 11:53:58,626 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;@1a5fab4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 11:53:58,626 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-12-02 11:53:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 60 states have (on average 2.033333333333333) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:53:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 11:53:58,637 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:53:58,638 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 11:53:58,638 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:53:58,644 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:53:58,644 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-12-02 11:53:58,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:53:58,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258180089] [2024-12-02 11:53:58,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:53:58,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:53:58,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:53:58,853 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 11:53:58,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:53:58,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258180089] [2024-12-02 11:53:58,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258180089] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:53:58,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:53:58,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:53:58,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693513895] [2024-12-02 11:53:58,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:53:58,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:53:58,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:53:58,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:53:58,892 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:53:58,895 INFO L87 Difference]: Start difference. First operand has 106 states, 60 states have (on average 2.033333333333333) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 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 11:53:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:53:59,103 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2024-12-02 11:53:59,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:53:59,106 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 11:53:59,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:53:59,114 INFO L225 Difference]: With dead ends: 129 [2024-12-02 11:53:59,114 INFO L226 Difference]: Without dead ends: 127 [2024-12-02 11:53:59,116 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 11:53:59,118 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 81 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:53:59,119 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:53:59,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-12-02 11:53:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2024-12-02 11:53:59,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.8596491228070176) internal successors, (106), 99 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:53:59,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2024-12-02 11:53:59,154 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 3 [2024-12-02 11:53:59,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:53:59,154 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2024-12-02 11:53:59,155 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 11:53:59,155 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2024-12-02 11:53:59,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 11:53:59,155 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:53:59,155 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 11:53:59,156 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 11:53:59,156 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:53:59,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:53:59,157 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-12-02 11:53:59,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:53:59,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799079401] [2024-12-02 11:53:59,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:53:59,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:53:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:53:59,262 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 11:53:59,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:53:59,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799079401] [2024-12-02 11:53:59,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799079401] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:53:59,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:53:59,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 11:53:59,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790727944] [2024-12-02 11:53:59,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:53:59,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 11:53:59,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:53:59,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 11:53:59,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 11:53:59,265 INFO L87 Difference]: Start difference. First operand 100 states and 106 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 11:53:59,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:53:59,443 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2024-12-02 11:53:59,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 11:53:59,444 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 11:53:59,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:53:59,445 INFO L225 Difference]: With dead ends: 125 [2024-12-02 11:53:59,446 INFO L226 Difference]: Without dead ends: 125 [2024-12-02 11:53:59,446 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 11:53:59,447 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 81 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:53:59,447 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 113 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:53:59,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-12-02 11:53:59,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2024-12-02 11:53:59,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:53:59,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2024-12-02 11:53:59,456 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 3 [2024-12-02 11:53:59,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:53:59,456 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2024-12-02 11:53:59,457 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 11:53:59,457 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2024-12-02 11:53:59,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 11:53:59,457 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:53:59,457 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:53:59,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 11:53:59,458 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:53:59,458 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:53:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140808, now seen corresponding path program 1 times [2024-12-02 11:53:59,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:53:59,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209670099] [2024-12-02 11:53:59,458 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:53:59,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:53:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:53:59,651 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 11:53:59,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:53:59,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209670099] [2024-12-02 11:53:59,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209670099] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:53:59,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:53:59,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:53:59,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019390294] [2024-12-02 11:53:59,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:53:59,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:53:59,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:53:59,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:53:59,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:53:59,653 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:53:59,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:53:59,872 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2024-12-02 11:53:59,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:53:59,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 11:53:59,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:53:59,874 INFO L225 Difference]: With dead ends: 96 [2024-12-02 11:53:59,874 INFO L226 Difference]: Without dead ends: 96 [2024-12-02 11:53:59,874 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 11:53:59,875 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:53:59,876 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 46 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:53:59,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-12-02 11:53:59,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-12-02 11:53:59,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.606060606060606) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:53:59,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2024-12-02 11:53:59,884 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 9 [2024-12-02 11:53:59,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:53:59,884 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2024-12-02 11:53:59,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:53:59,885 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2024-12-02 11:53:59,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 11:53:59,885 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:53:59,885 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:53:59,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 11:53:59,886 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:53:59,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:53:59,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140809, now seen corresponding path program 1 times [2024-12-02 11:53:59,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:53:59,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183857060] [2024-12-02 11:53:59,887 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:53:59,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:53:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:00,067 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 11:54:00,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:00,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183857060] [2024-12-02 11:54:00,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183857060] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:00,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:00,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:54:00,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967469063] [2024-12-02 11:54:00,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:00,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:54:00,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:00,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:54:00,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:54:00,069 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:00,296 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2024-12-02 11:54:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:54:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 11:54:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:00,297 INFO L225 Difference]: With dead ends: 113 [2024-12-02 11:54:00,297 INFO L226 Difference]: Without dead ends: 113 [2024-12-02 11:54:00,297 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 11:54:00,298 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 112 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:00,298 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 72 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:54:00,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-12-02 11:54:00,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-12-02 11:54:00,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.4470588235294117) internal successors, (123), 110 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:00,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2024-12-02 11:54:00,306 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 9 [2024-12-02 11:54:00,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:00,306 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2024-12-02 11:54:00,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:00,307 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2024-12-02 11:54:00,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 11:54:00,307 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:00,307 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:00,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 11:54:00,308 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:00,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:00,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1479989770, now seen corresponding path program 1 times [2024-12-02 11:54:00,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:00,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810535596] [2024-12-02 11:54:00,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:00,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:00,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:00,461 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 11:54:00,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:00,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810535596] [2024-12-02 11:54:00,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810535596] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:00,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:00,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 11:54:00,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926263440] [2024-12-02 11:54:00,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:00,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 11:54:00,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:00,463 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 11:54:00,463 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 11:54:00,463 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 11:54:00,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:00,707 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2024-12-02 11:54:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 11:54:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 11:54:00,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:00,708 INFO L225 Difference]: With dead ends: 112 [2024-12-02 11:54:00,709 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 11:54:00,709 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 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 11:54:00,710 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 26 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:00,710 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 194 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:54:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 11:54:00,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2024-12-02 11:54:00,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 109 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:00,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2024-12-02 11:54:00,718 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 13 [2024-12-02 11:54:00,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:00,718 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2024-12-02 11:54:00,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 11:54:00,719 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2024-12-02 11:54:00,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 11:54:00,719 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:00,719 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:00,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 11:54:00,720 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:00,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:00,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1479989771, now seen corresponding path program 1 times [2024-12-02 11:54:00,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:00,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648103858] [2024-12-02 11:54:00,721 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:00,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:00,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:00,907 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 11:54:00,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:00,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648103858] [2024-12-02 11:54:00,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648103858] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:00,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:00,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 11:54:00,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822348585] [2024-12-02 11:54:00,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:00,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 11:54:00,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:00,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 11:54:00,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 11:54:00,909 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 11:54:01,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:01,141 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-12-02 11:54:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:54:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 11:54:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:01,143 INFO L225 Difference]: With dead ends: 108 [2024-12-02 11:54:01,143 INFO L226 Difference]: Without dead ends: 108 [2024-12-02 11:54:01,143 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 11:54:01,144 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:01,144 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 239 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:54:01,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-12-02 11:54:01,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-12-02 11:54:01,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:01,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2024-12-02 11:54:01,149 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 13 [2024-12-02 11:54:01,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:01,149 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2024-12-02 11:54:01,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 11:54:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2024-12-02 11:54:01,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 11:54:01,150 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:01,150 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:01,150 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-12-02 11:54:01,150 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:01,150 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash 537622198, now seen corresponding path program 1 times [2024-12-02 11:54:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631193193] [2024-12-02 11:54:01,151 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:01,336 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 11:54:01,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:01,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631193193] [2024-12-02 11:54:01,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631193193] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:01,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:01,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 11:54:01,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078267200] [2024-12-02 11:54:01,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:01,337 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:54:01,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:01,337 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:54:01,338 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 11:54:01,338 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:01,482 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2024-12-02 11:54:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 11:54:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-12-02 11:54:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:01,483 INFO L225 Difference]: With dead ends: 112 [2024-12-02 11:54:01,483 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 11:54:01,483 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 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 11:54:01,484 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 22 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:01,484 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 226 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:54:01,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 11:54:01,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2024-12-02 11:54:01,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.4) internal successors, (119), 105 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:01,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-12-02 11:54:01,490 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 16 [2024-12-02 11:54:01,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:01,491 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-12-02 11:54:01,491 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:01,491 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-12-02 11:54:01,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 11:54:01,491 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:01,491 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:01,492 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-12-02 11:54:01,492 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:01,492 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 602883967, now seen corresponding path program 1 times [2024-12-02 11:54:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:01,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437672117] [2024-12-02 11:54:01,493 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:01,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:01,740 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 11:54:01,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437672117] [2024-12-02 11:54:01,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437672117] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:54:01,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618266579] [2024-12-02 11:54:01,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:01,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:01,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:54:01,743 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:54:01,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 11:54:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:01,849 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-12-02 11:54:01,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:54:01,905 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 11:54:01,958 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 11:54:01,958 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 11:54:01,998 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 11:54:02,076 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 11:54:02,108 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 11:54:02,108 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:54:02,173 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 11:54:02,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618266579] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:54:02,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:54:02,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 10 [2024-12-02 11:54:02,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170342280] [2024-12-02 11:54:02,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:54:02,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 11:54:02,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:02,175 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 11:54:02,175 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-12-02 11:54:02,175 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:02,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:02,529 INFO L93 Difference]: Finished difference Result 140 states and 158 transitions. [2024-12-02 11:54:02,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 11:54:02,529 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 11:54:02,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:02,530 INFO L225 Difference]: With dead ends: 140 [2024-12-02 11:54:02,530 INFO L226 Difference]: Without dead ends: 140 [2024-12-02 11:54:02,530 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:54:02,531 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 251 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:02,531 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 137 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 11:54:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-12-02 11:54:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 109. [2024-12-02 11:54:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 89 states have (on average 1.3820224719101124) internal successors, (123), 108 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 123 transitions. [2024-12-02 11:54:02,537 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 123 transitions. Word has length 18 [2024-12-02 11:54:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:02,537 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 123 transitions. [2024-12-02 11:54:02,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 123 transitions. [2024-12-02 11:54:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 11:54:02,538 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:02,539 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:02,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 11:54:02,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:02,740 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:02,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:02,740 INFO L85 PathProgramCache]: Analyzing trace with hash 602883968, now seen corresponding path program 1 times [2024-12-02 11:54:02,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:02,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108115097] [2024-12-02 11:54:02,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:02,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:02,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:03,208 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 11:54:03,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:03,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108115097] [2024-12-02 11:54:03,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108115097] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:54:03,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517475108] [2024-12-02 11:54:03,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:03,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:03,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:54:03,212 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:54:03,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 11:54:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:03,325 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 11:54:03,327 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:54:03,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-12-02 11:54:03,368 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 11:54:03,417 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 11:54:03,417 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 11:54:03,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517475108] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:03,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 11:54:03,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2024-12-02 11:54:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892721157] [2024-12-02 11:54:03,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:03,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 11:54:03,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:03,419 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 11:54:03,419 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-12-02 11:54:03,419 INFO L87 Difference]: Start difference. First operand 109 states and 123 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:03,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:03,593 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2024-12-02 11:54:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 11:54:03,594 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 11:54:03,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:03,595 INFO L225 Difference]: With dead ends: 126 [2024-12-02 11:54:03,595 INFO L226 Difference]: Without dead ends: 126 [2024-12-02 11:54:03,595 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2024-12-02 11:54:03,596 INFO L435 NwaCegarLoop]: 68 mSDtfsCounter, 24 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:03,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 218 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:54:03,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-12-02 11:54:03,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 106. [2024-12-02 11:54:03,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 86 states have (on average 1.372093023255814) internal successors, (118), 105 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 118 transitions. [2024-12-02 11:54:03,602 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 118 transitions. Word has length 18 [2024-12-02 11:54:03,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:03,602 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 118 transitions. [2024-12-02 11:54:03,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:03,603 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 118 transitions. [2024-12-02 11:54:03,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 11:54:03,603 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:03,603 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:03,615 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 11:54:03,804 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:03,804 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:03,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:03,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1511596969, now seen corresponding path program 1 times [2024-12-02 11:54:03,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:03,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704629512] [2024-12-02 11:54:03,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:03,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:04,050 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 11:54:04,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:04,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704629512] [2024-12-02 11:54:04,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704629512] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:04,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:04,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:54:04,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550082104] [2024-12-02 11:54:04,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:04,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 11:54:04,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:04,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 11:54:04,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 11:54:04,052 INFO L87 Difference]: Start difference. First operand 106 states and 118 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:04,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:04,396 INFO L93 Difference]: Finished difference Result 128 states and 144 transitions. [2024-12-02 11:54:04,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 11:54:04,397 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 11:54:04,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:04,398 INFO L225 Difference]: With dead ends: 128 [2024-12-02 11:54:04,398 INFO L226 Difference]: Without dead ends: 128 [2024-12-02 11:54:04,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 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 11:54:04,399 INFO L435 NwaCegarLoop]: 31 mSDtfsCounter, 151 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:04,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 116 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 11:54:04,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-12-02 11:54:04,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 110. [2024-12-02 11:54:04,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 90 states have (on average 1.3777777777777778) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:04,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2024-12-02 11:54:04,403 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 19 [2024-12-02 11:54:04,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:04,403 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2024-12-02 11:54:04,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:04,404 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2024-12-02 11:54:04,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 11:54:04,404 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:04,405 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:54:04,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 11:54:04,405 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:04,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:04,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1511596970, now seen corresponding path program 1 times [2024-12-02 11:54:04,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:04,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821242160] [2024-12-02 11:54:04,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:04,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:04,757 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 11:54:04,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:04,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821242160] [2024-12-02 11:54:04,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821242160] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:04,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:04,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 11:54:04,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906004863] [2024-12-02 11:54:04,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:04,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 11:54:04,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:04,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 11:54:04,760 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 11:54:04,760 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:05,305 INFO L93 Difference]: Finished difference Result 138 states and 153 transitions. [2024-12-02 11:54:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 11:54:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 11:54:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:05,307 INFO L225 Difference]: With dead ends: 138 [2024-12-02 11:54:05,307 INFO L226 Difference]: Without dead ends: 138 [2024-12-02 11:54:05,307 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 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 11:54:05,308 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 172 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:05,308 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 216 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 11:54:05,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-12-02 11:54:05,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 112. [2024-12-02 11:54:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 111 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 11:54:05,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 126 transitions. [2024-12-02 11:54:05,313 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 126 transitions. Word has length 19 [2024-12-02 11:54:05,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:05,313 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 126 transitions. [2024-12-02 11:54:05,313 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:05,313 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 126 transitions. [2024-12-02 11:54:05,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 11:54:05,314 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:05,314 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] [2024-12-02 11:54:05,314 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 11:54:05,315 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:05,315 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:05,315 INFO L85 PathProgramCache]: Analyzing trace with hash -743521535, now seen corresponding path program 1 times [2024-12-02 11:54:05,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:05,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808633258] [2024-12-02 11:54:05,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:05,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:05,378 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 11:54:05,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:05,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808633258] [2024-12-02 11:54:05,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808633258] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:05,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:05,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 11:54:05,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878322268] [2024-12-02 11:54:05,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:05,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:54:05,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:05,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:54:05,380 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:54:05,380 INFO L87 Difference]: Start difference. First operand 112 states and 126 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:05,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:05,496 INFO L93 Difference]: Finished difference Result 118 states and 132 transitions. [2024-12-02 11:54:05,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:54:05,497 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 11:54:05,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:05,498 INFO L225 Difference]: With dead ends: 118 [2024-12-02 11:54:05,498 INFO L226 Difference]: Without dead ends: 118 [2024-12-02 11:54:05,498 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 11:54:05,499 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 110 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:05,499 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 93 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:54:05,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-12-02 11:54:05,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 112. [2024-12-02 11:54:05,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 92 states have (on average 1.358695652173913) internal successors, (125), 111 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 125 transitions. [2024-12-02 11:54:05,503 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 125 transitions. Word has length 22 [2024-12-02 11:54:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:05,503 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 125 transitions. [2024-12-02 11:54:05,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 125 transitions. [2024-12-02 11:54:05,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 11:54:05,504 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:05,504 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] [2024-12-02 11:54:05,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 11:54:05,505 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:05,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:05,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1672726513, now seen corresponding path program 1 times [2024-12-02 11:54:05,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:05,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651298115] [2024-12-02 11:54:05,505 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:05,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:05,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:05,937 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 11:54:05,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:05,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651298115] [2024-12-02 11:54:05,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651298115] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:05,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:05,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 11:54:05,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497845464] [2024-12-02 11:54:05,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:05,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 11:54:05,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:05,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 11:54:05,939 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-12-02 11:54:05,939 INFO L87 Difference]: Start difference. First operand 112 states and 125 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:06,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:06,446 INFO L93 Difference]: Finished difference Result 167 states and 183 transitions. [2024-12-02 11:54:06,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 11:54:06,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2024-12-02 11:54:06,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:06,448 INFO L225 Difference]: With dead ends: 167 [2024-12-02 11:54:06,448 INFO L226 Difference]: Without dead ends: 167 [2024-12-02 11:54:06,448 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-12-02 11:54:06,449 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 172 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:06,449 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 369 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 11:54:06,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-12-02 11:54:06,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 123. [2024-12-02 11:54:06,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 103 states have (on average 1.3300970873786409) internal successors, (137), 122 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 137 transitions. [2024-12-02 11:54:06,453 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 137 transitions. Word has length 23 [2024-12-02 11:54:06,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:06,454 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 137 transitions. [2024-12-02 11:54:06,454 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 137 transitions. [2024-12-02 11:54:06,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 11:54:06,455 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:06,455 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 11:54:06,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-12-02 11:54:06,455 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:06,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:06,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1200275603, now seen corresponding path program 1 times [2024-12-02 11:54:06,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:06,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314969013] [2024-12-02 11:54:06,456 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:06,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:06,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:06,665 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 11:54:06,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:06,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314969013] [2024-12-02 11:54:06,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314969013] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:06,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:06,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 11:54:06,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433952484] [2024-12-02 11:54:06,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:06,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 11:54:06,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:06,666 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 11:54:06,666 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 11:54:06,667 INFO L87 Difference]: Start difference. First operand 123 states and 137 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 11:54:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:06,966 INFO L93 Difference]: Finished difference Result 164 states and 180 transitions. [2024-12-02 11:54:06,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 11:54:06,967 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 11:54:06,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:06,967 INFO L225 Difference]: With dead ends: 164 [2024-12-02 11:54:06,967 INFO L226 Difference]: Without dead ends: 164 [2024-12-02 11:54:06,968 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-12-02 11:54:06,968 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 124 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:06,968 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 279 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 11:54:06,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-12-02 11:54:06,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 127. [2024-12-02 11:54:06,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 107 states have (on average 1.3177570093457944) internal successors, (141), 126 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 11:54:06,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 141 transitions. [2024-12-02 11:54:06,972 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 141 transitions. Word has length 24 [2024-12-02 11:54:06,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:06,973 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 141 transitions. [2024-12-02 11:54:06,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 11:54:06,973 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 141 transitions. [2024-12-02 11:54:06,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 11:54:06,974 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:06,974 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] [2024-12-02 11:54:06,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-12-02 11:54:06,974 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:06,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:06,974 INFO L85 PathProgramCache]: Analyzing trace with hash -287365889, now seen corresponding path program 1 times [2024-12-02 11:54:06,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:06,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091045533] [2024-12-02 11:54:06,975 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:06,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:06,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:07,354 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 11:54:07,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:07,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091045533] [2024-12-02 11:54:07,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091045533] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:54:07,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453330515] [2024-12-02 11:54:07,355 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:07,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:07,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:54:07,357 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:54:07,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 11:54:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:07,472 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-12-02 11:54:07,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:54:07,482 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 11:54:07,512 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 11:54:07,520 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 11:54:07,565 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 11:54:07,578 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 11:54:07,640 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:54:07,640 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 11:54:07,691 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 11:54:07,700 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 11:54:07,720 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 11:54:07,731 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 22 [2024-12-02 11:54:08,099 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 11:54:08,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:54:08,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:08,753 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 13 treesize of output 17 [2024-12-02 11:54:08,774 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:08,774 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 13 treesize of output 17 [2024-12-02 11:54:09,698 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:09,698 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 18 treesize of output 19 [2024-12-02 11:54:09,712 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:09,712 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 30 treesize of output 30 [2024-12-02 11:54:09,724 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:09,724 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 11:54:09,780 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:09,780 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 18 treesize of output 19 [2024-12-02 11:54:09,784 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:54:09,794 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:54:09,794 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 16 treesize of output 11 [2024-12-02 11:54:09,801 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 6 treesize of output 4 [2024-12-02 11:54:09,875 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 11:54:09,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453330515] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:54:09,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:54:09,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 12] total 25 [2024-12-02 11:54:09,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096809599] [2024-12-02 11:54:09,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:54:09,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-12-02 11:54:09,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:09,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-12-02 11:54:09,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2024-12-02 11:54:09,877 INFO L87 Difference]: Start difference. First operand 127 states and 141 transitions. Second operand has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:11,156 INFO L93 Difference]: Finished difference Result 154 states and 169 transitions. [2024-12-02 11:54:11,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 11:54:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-12-02 11:54:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:11,157 INFO L225 Difference]: With dead ends: 154 [2024-12-02 11:54:11,158 INFO L226 Difference]: Without dead ends: 154 [2024-12-02 11:54:11,158 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2024-12-02 11:54:11,158 INFO L435 NwaCegarLoop]: 51 mSDtfsCounter, 153 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 605 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:11,159 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 605 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-12-02 11:54:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-12-02 11:54:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 130. [2024-12-02 11:54:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 110 states have (on average 1.309090909090909) internal successors, (144), 129 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 11:54:11,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 144 transitions. [2024-12-02 11:54:11,162 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 144 transitions. Word has length 24 [2024-12-02 11:54:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:11,162 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 144 transitions. [2024-12-02 11:54:11,162 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.56) internal successors, (64), 25 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 144 transitions. [2024-12-02 11:54:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 11:54:11,163 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:11,163 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] [2024-12-02 11:54:11,172 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 11:54:11,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-12-02 11:54:11,364 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:11,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1028665442, now seen corresponding path program 1 times [2024-12-02 11:54:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:11,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879396132] [2024-12-02 11:54:11,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:11,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:11,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:11,632 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 11:54:11,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:11,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879396132] [2024-12-02 11:54:11,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879396132] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:54:11,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546727003] [2024-12-02 11:54:11,633 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:11,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:11,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:54:11,635 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:54:11,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 11:54:11,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:11,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-12-02 11:54:11,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:54:11,732 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 11:54:11,774 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-02 11:54:11,775 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 11:54:11,813 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 11:54:11,918 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 11:54:11,918 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 11:54:11,937 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 11:54:11,938 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 11:54:12,026 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 11:54:12,083 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 11:54:12,083 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:54:12,109 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_498 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_498) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 11:54:12,118 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_498 (Array Int Int))) (= 1 (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_498) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) is different from false [2024-12-02 11:54:12,124 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_498 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$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_498) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 11:54:12,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:12,133 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 20 treesize of output 21 [2024-12-02 11:54:12,141 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:12,141 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 34 treesize of output 37 [2024-12-02 11:54:12,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-12-02 11:54:12,502 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 11:54:12,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546727003] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:54:12,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:54:12,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2024-12-02 11:54:12,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891441443] [2024-12-02 11:54:12,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:54:12,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-12-02 11:54:12,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:12,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-12-02 11:54:12,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=416, Unknown=3, NotChecked=132, Total=650 [2024-12-02 11:54:12,505 INFO L87 Difference]: Start difference. First operand 130 states and 144 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:13,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:13,844 INFO L93 Difference]: Finished difference Result 234 states and 264 transitions. [2024-12-02 11:54:13,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-12-02 11:54:13,844 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 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 11:54:13,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:13,846 INFO L225 Difference]: With dead ends: 234 [2024-12-02 11:54:13,846 INFO L226 Difference]: Without dead ends: 234 [2024-12-02 11:54:13,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=916, Unknown=3, NotChecked=198, Total=1332 [2024-12-02 11:54:13,848 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 373 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 681 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:13,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 511 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1103 Invalid, 0 Unknown, 681 Unchecked, 1.0s Time] [2024-12-02 11:54:13,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2024-12-02 11:54:13,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 148. [2024-12-02 11:54:13,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 128 states have (on average 1.3046875) internal successors, (167), 147 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 11:54:13,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 167 transitions. [2024-12-02 11:54:13,853 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 167 transitions. Word has length 25 [2024-12-02 11:54:13,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:13,853 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 167 transitions. [2024-12-02 11:54:13,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:13,854 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 167 transitions. [2024-12-02 11:54:13,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 11:54:13,854 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:13,854 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] [2024-12-02 11:54:13,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 11:54:14,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:14,055 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:14,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:14,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1028665443, now seen corresponding path program 1 times [2024-12-02 11:54:14,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:14,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015844936] [2024-12-02 11:54:14,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:14,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:14,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:14,543 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 11:54:14,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:14,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015844936] [2024-12-02 11:54:14,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015844936] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:54:14,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715982330] [2024-12-02 11:54:14,544 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:14,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:14,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:54:14,546 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:54:14,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 11:54:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:14,670 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-12-02 11:54:14,673 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:54:14,677 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 11:54:14,719 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 11:54:14,731 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:54:14,731 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 11:54:14,770 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 11:54:14,778 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 11:54:14,913 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 11:54:14,913 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 11:54:14,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 11:54:14,937 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 11:54:14,937 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 11:54:14,987 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 11:54:14,987 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 11:54:14,994 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 11:54:15,124 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 11:54:15,130 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 11:54:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:54:15,187 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:54:15,357 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_574 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (forall ((v_ArrVal_573 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_574) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_573) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 11:54:15,450 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_573 (Array Int Int)) (v_ArrVal_574 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_574) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_573) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))) (forall ((v_ArrVal_574 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| .cse0 v_ArrVal_574) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 11:54:15,465 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:15,465 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 18 treesize of output 19 [2024-12-02 11:54:15,473 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:15,473 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 34 treesize of output 37 [2024-12-02 11:54:15,492 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 11:54:15,501 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:15,501 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 38 [2024-12-02 11:54:15,509 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:15,509 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 29 treesize of output 30 [2024-12-02 11:54:15,512 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:54:15,515 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 27 treesize of output 19 [2024-12-02 11:54:15,519 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:54:15,521 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 11:54:15,701 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 11:54:15,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715982330] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:54:15,701 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:54:15,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2024-12-02 11:54:15,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852222080] [2024-12-02 11:54:15,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:54:15,702 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-12-02 11:54:15,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:15,703 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-12-02 11:54:15,703 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=649, Unknown=19, NotChecked=106, Total=870 [2024-12-02 11:54:15,704 INFO L87 Difference]: Start difference. First operand 148 states and 167 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 11:54:17,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:17,321 INFO L93 Difference]: Finished difference Result 191 states and 214 transitions. [2024-12-02 11:54:17,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 11:54:17,322 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 25 [2024-12-02 11:54:17,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:17,323 INFO L225 Difference]: With dead ends: 191 [2024-12-02 11:54:17,323 INFO L226 Difference]: Without dead ends: 191 [2024-12-02 11:54:17,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=1449, Unknown=27, NotChecked=162, Total=1892 [2024-12-02 11:54:17,324 INFO L435 NwaCegarLoop]: 69 mSDtfsCounter, 273 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:17,324 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 750 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1296 Invalid, 0 Unknown, 344 Unchecked, 1.0s Time] [2024-12-02 11:54:17,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-12-02 11:54:17,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2024-12-02 11:54:17,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 135 states have (on average 1.2740740740740741) internal successors, (172), 151 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:17,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 172 transitions. [2024-12-02 11:54:17,329 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 172 transitions. Word has length 25 [2024-12-02 11:54:17,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:17,329 INFO L471 AbstractCegarLoop]: Abstraction has 152 states and 172 transitions. [2024-12-02 11:54:17,329 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 11:54:17,329 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 172 transitions. [2024-12-02 11:54:17,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 11:54:17,330 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:17,330 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 11:54:17,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 11:54:17,530 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-12-02 11:54:17,531 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:17,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:17,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1444098795, now seen corresponding path program 1 times [2024-12-02 11:54:17,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:17,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598587232] [2024-12-02 11:54:17,531 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:17,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:17,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:17,792 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 11:54:17,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:17,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598587232] [2024-12-02 11:54:17,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598587232] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:17,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:17,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 11:54:17,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798473946] [2024-12-02 11:54:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:17,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 11:54:17,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:17,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 11:54:17,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-12-02 11:54:17,794 INFO L87 Difference]: Start difference. First operand 152 states and 172 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 11:54:18,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:18,171 INFO L93 Difference]: Finished difference Result 172 states and 192 transitions. [2024-12-02 11:54:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 11:54:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 11:54:18,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:18,172 INFO L225 Difference]: With dead ends: 172 [2024-12-02 11:54:18,172 INFO L226 Difference]: Without dead ends: 172 [2024-12-02 11:54:18,173 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2024-12-02 11:54:18,173 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 49 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:18,173 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 290 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 11:54:18,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-12-02 11:54:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 164. [2024-12-02 11:54:18,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 147 states have (on average 1.251700680272109) internal successors, (184), 163 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 11:54:18,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 184 transitions. [2024-12-02 11:54:18,179 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 184 transitions. Word has length 25 [2024-12-02 11:54:18,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:18,179 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 184 transitions. [2024-12-02 11:54:18,179 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 11 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 11:54:18,179 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 184 transitions. [2024-12-02 11:54:18,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 11:54:18,180 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:18,180 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 11:54:18,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-12-02 11:54:18,180 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:18,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1174157383, now seen corresponding path program 1 times [2024-12-02 11:54:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538343993] [2024-12-02 11:54:18,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:18,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:18,314 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 11:54:18,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:18,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538343993] [2024-12-02 11:54:18,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538343993] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:18,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:18,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 11:54:18,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387268213] [2024-12-02 11:54:18,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:18,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 11:54:18,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:18,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 11:54:18,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 11:54:18,316 INFO L87 Difference]: Start difference. First operand 164 states and 184 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 11:54:18,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:18,550 INFO L93 Difference]: Finished difference Result 190 states and 209 transitions. [2024-12-02 11:54:18,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 11:54:18,551 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 11:54:18,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:18,551 INFO L225 Difference]: With dead ends: 190 [2024-12-02 11:54:18,551 INFO L226 Difference]: Without dead ends: 190 [2024-12-02 11:54:18,552 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2024-12-02 11:54:18,552 INFO L435 NwaCegarLoop]: 49 mSDtfsCounter, 176 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:18,552 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 205 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 11:54:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-12-02 11:54:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 164. [2024-12-02 11:54:18,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 147 states have (on average 1.2380952380952381) internal successors, (182), 163 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:18,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 182 transitions. [2024-12-02 11:54:18,558 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 182 transitions. Word has length 25 [2024-12-02 11:54:18,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:18,558 INFO L471 AbstractCegarLoop]: Abstraction has 164 states and 182 transitions. [2024-12-02 11:54:18,558 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 7 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 11:54:18,558 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 182 transitions. [2024-12-02 11:54:18,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-12-02 11:54:18,559 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:18,559 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] [2024-12-02 11:54:18,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-12-02 11:54:18,559 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr42ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:18,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:18,559 INFO L85 PathProgramCache]: Analyzing trace with hash -841158513, now seen corresponding path program 1 times [2024-12-02 11:54:18,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:18,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508298589] [2024-12-02 11:54:18,560 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:54:18,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:54:18,641 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 11:54:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:18,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508298589] [2024-12-02 11:54:18,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508298589] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 11:54:18,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 11:54:18,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 11:54:18,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397943858] [2024-12-02 11:54:18,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 11:54:18,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 11:54:18,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:18,642 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 11:54:18,642 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 11:54:18,642 INFO L87 Difference]: Start difference. First operand 164 states and 182 transitions. Second operand has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:54:18,773 INFO L93 Difference]: Finished difference Result 166 states and 184 transitions. [2024-12-02 11:54:18,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 11:54:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-12-02 11:54:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:54:18,775 INFO L225 Difference]: With dead ends: 166 [2024-12-02 11:54:18,775 INFO L226 Difference]: Without dead ends: 166 [2024-12-02 11:54:18,775 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 11:54:18,776 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 98 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 11:54:18,776 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 84 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 11:54:18,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-12-02 11:54:18,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2024-12-02 11:54:18,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 148 states have (on average 1.2364864864864864) internal successors, (183), 164 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:18,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 183 transitions. [2024-12-02 11:54:18,781 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 183 transitions. Word has length 30 [2024-12-02 11:54:18,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:54:18,781 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 183 transitions. [2024-12-02 11:54:18,782 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.0) internal successors, (30), 4 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:54:18,782 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 183 transitions. [2024-12-02 11:54:18,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-12-02 11:54:18,782 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:54:18,783 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] [2024-12-02 11:54:18,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 11:54:18,783 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:54:18,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:54:18,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1611772363, now seen corresponding path program 2 times [2024-12-02 11:54:18,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:54:18,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386526689] [2024-12-02 11:54:18,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:54:18,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:54:18,802 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:54:18,802 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:54:19,299 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 11:54:19,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:54:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386526689] [2024-12-02 11:54:19,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386526689] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:54:19,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339438002] [2024-12-02 11:54:19,300 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-12-02 11:54:19,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:54:19,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:54:19,302 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:54:19,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 11:54:19,412 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-12-02 11:54:19,412 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:54:19,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-12-02 11:54:19,418 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:54:19,423 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 11:54:19,504 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:54:19,504 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 11:54:19,538 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 11:54:19,545 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 11:54:19,675 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 11:54:19,676 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 11:54:19,690 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 11:54:19,691 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 11:54:19,733 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-12-02 11:54:19,734 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 11:54:19,738 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 11:54:20,042 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 11:54:20,042 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:54:20,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:20,321 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 11:54:20,327 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:20,328 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 11:54:21,030 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:21,030 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 48 treesize of output 49 [2024-12-02 11:54:21,039 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:21,039 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 59 treesize of output 43 [2024-12-02 11:54:21,055 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:21,055 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 58 treesize of output 61 [2024-12-02 11:54:21,232 INFO L349 Elim1Store]: treesize reduction 30, result has 83.9 percent of original size [2024-12-02 11:54:21,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 183 treesize of output 294 [2024-12-02 11:54:21,307 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:21,308 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 145 treesize of output 175 [2024-12-02 11:54:21,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:21,373 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 103 treesize of output 93 [2024-12-02 11:54:31,519 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:31,519 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 67 treesize of output 59 [2024-12-02 11:54:31,528 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:54:31,528 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 40 treesize of output 33 [2024-12-02 11:54:31,582 INFO L349 Elim1Store]: treesize reduction 72, result has 26.5 percent of original size [2024-12-02 11:54:31,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 112 treesize of output 101 [2024-12-02 11:54:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:54:31,600 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 40 treesize of output 36 [2024-12-02 11:54:31,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:54:31,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:54:31,609 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 67 [2024-12-02 11:54:31,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:54:31,635 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2024-12-02 11:54:31,888 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 11:54:31,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339438002] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:54:31,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:54:31,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 34 [2024-12-02 11:54:31,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727660568] [2024-12-02 11:54:31,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:54:31,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-12-02 11:54:31,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:54:31,890 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-12-02 11:54:31,890 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=995, Unknown=23, NotChecked=0, Total=1122 [2024-12-02 11:54:31,890 INFO L87 Difference]: Start difference. First operand 165 states and 183 transitions. Second operand has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:55:39,681 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~head~0#1.base|) 0))) (and (= (select (select |c_#memory_$Pointer$#1.base| .cse0) 0) 0) (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (forall ((v_arrayElimArr_9 (Array Int Int))) (or (not (= (select v_arrayElimArr_9 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (forall ((v_arrayElimArr_10 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_10))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse1 0) (= (select (select .cse2 (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_9) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) .cse1) 0) (not (= (select v_arrayElimArr_10 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)))))))) (= (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~head~0#1.base|) 0) 0) (= (select (select |c_#memory_$Pointer$#1.offset| .cse0) 0) 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|) 1) (not (= |c_ULTIMATE.start_main_~head~0#1.base| .cse0)) (forall ((v_arrayElimArr_9 (Array Int Int))) (or (forall ((v_arrayElimArr_10 (Array Int Int))) (let ((.cse4 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_10) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (= (select (let ((.cse3 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_9))) (select .cse3 (select (select .cse3 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) .cse4) 0) (< .cse4 0) (not (= (select v_arrayElimArr_10 |c_ULTIMATE.start_main_~x~0#1.offset|) 0))))) (not (= (select v_arrayElimArr_9 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)))))) is different from false [2024-12-02 11:55:46,392 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse4 (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (.cse3 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|)) (.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~head~0#1.base|) 0))) (and (= (select (select |c_#memory_$Pointer$#1.base| .cse0) 0) 0) (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (forall ((v_arrayElimArr_9 (Array Int Int))) (or (forall ((v_arrayElimArr_10 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$#1.offset| .cse3 v_arrayElimArr_10))) (let ((.cse1 (select (select .cse2 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse1 0) (= (select (select .cse2 (select (select (store |c_#memory_$Pointer$#1.base| .cse3 v_arrayElimArr_9) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) .cse1) 0) (not (= 0 (select v_arrayElimArr_10 .cse4))))))) (not (= (select v_arrayElimArr_9 .cse4) 0)))) (forall ((v_arrayElimArr_9 (Array Int Int))) (or (not (= (select v_arrayElimArr_9 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)) (forall ((v_arrayElimArr_10 (Array Int Int))) (let ((.cse6 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_10))) (let ((.cse5 (select (select .cse6 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse5 0) (= (select (select .cse6 (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_9) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) .cse5) 0) (not (= (select v_arrayElimArr_10 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)))))))) (= (select (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~head~0#1.base|) 0) 0) (= |c_ULTIMATE.start_main_~x~0#1.offset| 0) (exists ((|v_ULTIMATE.start_main_~x~0#1.base_106| Int)) (let ((.cse7 (select (select |c_#memory_$Pointer$#1.base| |v_ULTIMATE.start_main_~x~0#1.base_106|) 0))) (and (= (select (select |c_#memory_$Pointer$#1.offset| |v_ULTIMATE.start_main_~x~0#1.base_106|) 0) 0) (not (= |v_ULTIMATE.start_main_~x~0#1.base_106| .cse7)) (= (select (select |c_#memory_$Pointer$#1.base| .cse7) 0) 0) (= (select (select |c_#memory_$Pointer$#1.offset| .cse7) 0) 0) (= .cse7 |c_ULTIMATE.start_main_~x~0#1.base|)))) (= (select (select |c_#memory_$Pointer$#1.offset| .cse0) 0) 0) (= (select |c_#valid| |c_ULTIMATE.start_main_~head~0#1.base|) 1) (forall ((v_arrayElimArr_9 (Array Int Int))) (or (not (= (select v_arrayElimArr_9 .cse4) 0)) (forall ((v_arrayElimArr_10 (Array Int Int))) (let ((.cse8 (select (select (store |c_#memory_$Pointer$#1.offset| .cse3 v_arrayElimArr_10) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (< .cse8 0) (= (select (let ((.cse9 (store |c_#memory_$Pointer$#1.base| .cse3 v_arrayElimArr_9))) (select .cse9 (select (select .cse9 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) .cse8) 0) (not (= 0 (select v_arrayElimArr_10 .cse4)))))))) (not (= |c_ULTIMATE.start_main_~head~0#1.base| .cse0)) (forall ((v_arrayElimArr_9 (Array Int Int))) (or (forall ((v_arrayElimArr_10 (Array Int Int))) (let ((.cse11 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_10) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (or (= (select (let ((.cse10 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_arrayElimArr_9))) (select .cse10 (select (select .cse10 |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) .cse11) 0) (< .cse11 0) (not (= (select v_arrayElimArr_10 |c_ULTIMATE.start_main_~x~0#1.offset|) 0))))) (not (= (select v_arrayElimArr_9 |c_ULTIMATE.start_main_~x~0#1.offset|) 0)))))) is different from false [2024-12-02 11:55:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:55:50,663 INFO L93 Difference]: Finished difference Result 207 states and 226 transitions. [2024-12-02 11:55:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 11:55:50,664 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2024-12-02 11:55:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:55:50,665 INFO L225 Difference]: With dead ends: 207 [2024-12-02 11:55:50,665 INFO L226 Difference]: Without dead ends: 207 [2024-12-02 11:55:50,666 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 72.6s TimeCoverageRelationStatistics Valid=201, Invalid=1496, Unknown=33, NotChecked=162, Total=1892 [2024-12-02 11:55:50,667 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 307 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 1316 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 1002 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2024-12-02 11:55:50,667 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 1002 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1316 Invalid, 0 Unknown, 65 Unchecked, 7.4s Time] [2024-12-02 11:55:50,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-12-02 11:55:50,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 163. [2024-12-02 11:55:50,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 146 states have (on average 1.226027397260274) internal successors, (179), 162 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:55:50,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 179 transitions. [2024-12-02 11:55:50,673 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 179 transitions. Word has length 31 [2024-12-02 11:55:50,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:55:50,673 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 179 transitions. [2024-12-02 11:55:50,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.323529411764706) internal successors, (79), 34 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:55:50,674 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 179 transitions. [2024-12-02 11:55:50,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-12-02 11:55:50,674 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:55:50,674 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] [2024-12-02 11:55:50,692 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-12-02 11:55:50,875 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-12-02 11:55:50,875 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:55:50,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:55:50,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1329562851, now seen corresponding path program 1 times [2024-12-02 11:55:50,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:55:50,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037522513] [2024-12-02 11:55:50,876 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:50,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:55:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:53,653 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 11:55:53,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:55:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037522513] [2024-12-02 11:55:53,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037522513] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:55:53,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055277923] [2024-12-02 11:55:53,654 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:55:53,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:55:53,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:55:53,657 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:55:53,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 11:55:53,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:55:53,801 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-12-02 11:55:53,805 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:55:53,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 11:55:53,903 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 11:55:54,472 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:55:54,472 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 11:55:54,815 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 11:55:54,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:55:54,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 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 11:55:55,334 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 11:55:55,443 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 11:55:55,527 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 11:55:55,763 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:55:55,763 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 11:55:55,840 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 16 treesize of output 11 [2024-12-02 11:55:55,875 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 11:55:55,907 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 11:55:55,941 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 11:55:56,579 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 11:55:56,596 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 11:55:56,876 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 11:55:56,877 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:55:59,937 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 11:55:59,937 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 12 [2024-12-02 11:56:01,214 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_842 (Array Int Int)) (v_ArrVal_844 (Array Int Int)) (|v_ULTIMATE.start_main_#t~malloc3#1.base_22| Int) (v_ArrVal_847 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.base_118| Int) (|v_ULTIMATE.start_main_~x~0#1.offset_102| Int)) (or (not (= v_ArrVal_842 (store (select |c_#memory_int#1| |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_102| (select v_ArrVal_842 |v_ULTIMATE.start_main_~x~0#1.offset_102|)))) (= |v_ULTIMATE.start_main_~x~0#1.base_118| |c_ULTIMATE.start_main_~head~0#1.base|) (not (= (select |c_#valid| |v_ULTIMATE.start_main_#t~malloc3#1.base_22|) 0)) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_102|) (not (= (select (select (store (store (store |c_#memory_int#1| |c_ULTIMATE.start_main_~head~0#1.base| v_ArrVal_842) |v_ULTIMATE.start_main_#t~malloc3#1.base_22| v_ArrVal_844) |v_ULTIMATE.start_main_~x~0#1.base_118| v_ArrVal_847) |c_ULTIMATE.start_main_~head~0#1.base|) (+ |c_ULTIMATE.start_main_~head~0#1.offset| 4)) 1)))) is different from false [2024-12-02 11:56:01,250 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:56:01,259 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 43 treesize of output 41 [2024-12-02 11:56:01,281 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:56:01,296 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 8 treesize of output 4 [2024-12-02 11:56:01,618 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 11:56:01,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055277923] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:56:01,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:56:01,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 16] total 36 [2024-12-02 11:56:01,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973821456] [2024-12-02 11:56:01,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:56:01,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 11:56:01,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:56:01,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 11:56:01,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1011, Unknown=41, NotChecked=66, Total=1260 [2024-12-02 11:56:01,622 INFO L87 Difference]: Start difference. First operand 163 states and 179 transitions. Second operand has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:56:11,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:56:11,592 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2024-12-02 11:56:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 11:56:11,592 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-12-02 11:56:11,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:56:11,594 INFO L225 Difference]: With dead ends: 224 [2024-12-02 11:56:11,594 INFO L226 Difference]: Without dead ends: 224 [2024-12-02 11:56:11,594 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=261, Invalid=1673, Unknown=50, NotChecked=86, Total=2070 [2024-12-02 11:56:11,596 INFO L435 NwaCegarLoop]: 60 mSDtfsCounter, 269 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2024-12-02 11:56:11,596 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 748 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1099 Invalid, 0 Unknown, 156 Unchecked, 7.7s Time] [2024-12-02 11:56:11,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-12-02 11:56:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 174. [2024-12-02 11:56:11,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 157 states have (on average 1.2101910828025477) internal successors, (190), 173 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:56:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2024-12-02 11:56:11,601 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 32 [2024-12-02 11:56:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:56:11,601 INFO L471 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2024-12-02 11:56:11,601 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.1666666666666665) internal successors, (78), 36 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:56:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2024-12-02 11:56:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-12-02 11:56:11,601 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:56:11,601 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, 1, 1] [2024-12-02 11:56:11,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 11:56:11,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-12-02 11:56:11,802 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:56:11,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:56:11,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1705676117, now seen corresponding path program 1 times [2024-12-02 11:56:11,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:56:11,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858796353] [2024-12-02 11:56:11,802 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:56:11,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:56:11,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:56:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:13,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:56:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858796353] [2024-12-02 11:56:13,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858796353] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:56:13,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237468380] [2024-12-02 11:56:13,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:56:13,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:56:13,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:56:13,512 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:56:13,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 11:56:13,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:56:13,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-12-02 11:56:13,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:56:13,678 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 11:56:14,526 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-02 11:56:14,526 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 11:56:14,980 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 11:56:16,190 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 11:56:16,190 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 1 case distinctions, treesize of input 33 treesize of output 24 [2024-12-02 11:56:16,343 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 11:56:16,344 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 11:56:17,001 INFO L349 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2024-12-02 11:56:17,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 26 [2024-12-02 11:56:17,541 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 11:56:17,541 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 26 treesize of output 23 [2024-12-02 11:56:17,607 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 14 treesize of output 10 [2024-12-02 11:56:18,129 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 11:56:18,309 INFO L349 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2024-12-02 11:56:18,310 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 68 treesize of output 56 [2024-12-02 11:56:21,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 11:56:24,049 INFO L349 Elim1Store]: treesize reduction 8, result has 83.7 percent of original size [2024-12-02 11:56:24,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 147 treesize of output 171 [2024-12-02 11:56:27,950 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:56:27,950 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 25 [2024-12-02 11:56:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:28,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:56:30,109 INFO L349 Elim1Store]: treesize reduction 4, result has 78.9 percent of original size [2024-12-02 11:56:30,109 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 28 treesize of output 23 [2024-12-02 11:56:33,101 WARN L851 $PredicateComparison]: unable to prove that (and (or (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (forall ((v_ArrVal_953 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.base_129| Int) (v_ArrVal_951 (Array Int Int))) (= 1 (select (store |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_129| 1) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_951) |v_ULTIMATE.start_main_~x~0#1.base_129| v_ArrVal_953) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) (forall ((v_ArrVal_953 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.base_129| Int) (v_ArrVal_951 (Array Int Int))) (or (= |v_ULTIMATE.start_main_~x~0#1.base_129| |c_ULTIMATE.start_main_~head~0#1.base|) (= 1 (select (store |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_129| 1) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_951) |v_ULTIMATE.start_main_~x~0#1.base_129| v_ArrVal_953) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) is different from false [2024-12-02 11:56:33,187 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base|) |c_ULTIMATE.start_main_~x~0#1.offset|))) (and (forall ((v_ArrVal_953 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.base_129| Int) (v_ArrVal_951 (Array Int Int))) (or (= |v_ULTIMATE.start_main_~x~0#1.base_129| |c_ULTIMATE.start_main_~head~0#1.base|) (= (select (store |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_129| 1) (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_951) |v_ULTIMATE.start_main_~x~0#1.base_129| v_ArrVal_953) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))) (or (= |c_ULTIMATE.start_main_~head~0#1.offset| 0) (forall ((v_ArrVal_953 (Array Int Int)) (|v_ULTIMATE.start_main_~x~0#1.base_129| Int) (v_ArrVal_951 (Array Int Int))) (= (select (store |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_129| 1) (select (select (store (store |c_#memory_$Pointer$#1.base| .cse0 v_ArrVal_951) |v_ULTIMATE.start_main_~x~0#1.base_129| v_ArrVal_953) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1))))) is different from false [2024-12-02 11:56:33,287 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:56:33,287 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 26 treesize of output 27 [2024-12-02 11:56:33,345 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:56:33,346 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 80 treesize of output 83 [2024-12-02 11:56:33,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 64 [2024-12-02 11:56:33,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2024-12-02 11:56:34,832 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:56:34,832 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 26 treesize of output 27 [2024-12-02 11:56:34,840 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:56:34,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:56:34,891 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 40 treesize of output 43 [2024-12-02 11:56:34,907 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 14 treesize of output 12 [2024-12-02 11:56:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:56:45,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237468380] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:56:45,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:56:45,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20, 20] total 52 [2024-12-02 11:56:45,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493953411] [2024-12-02 11:56:45,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:56:45,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-12-02 11:56:45,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:56:45,374 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-12-02 11:56:45,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2241, Unknown=29, NotChecked=198, Total=2756 [2024-12-02 11:56:45,375 INFO L87 Difference]: Start difference. First operand 174 states and 190 transitions. Second operand has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 53 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:57:11,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:57:11,952 INFO L93 Difference]: Finished difference Result 244 states and 268 transitions. [2024-12-02 11:57:11,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-12-02 11:57:11,954 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 53 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-12-02 11:57:11,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:57:11,955 INFO L225 Difference]: With dead ends: 244 [2024-12-02 11:57:11,955 INFO L226 Difference]: Without dead ends: 244 [2024-12-02 11:57:11,956 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=764, Invalid=4608, Unknown=38, NotChecked=290, Total=5700 [2024-12-02 11:57:11,957 INFO L435 NwaCegarLoop]: 45 mSDtfsCounter, 556 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 2556 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 3120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 2556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2024-12-02 11:57:11,957 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [556 Valid, 1101 Invalid, 3120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 2556 Invalid, 0 Unknown, 442 Unchecked, 15.9s Time] [2024-12-02 11:57:11,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-12-02 11:57:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 178. [2024-12-02 11:57:11,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 161 states have (on average 1.2173913043478262) internal successors, (196), 177 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:57:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 196 transitions. [2024-12-02 11:57:11,963 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 196 transitions. Word has length 33 [2024-12-02 11:57:11,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:57:11,963 INFO L471 AbstractCegarLoop]: Abstraction has 178 states and 196 transitions. [2024-12-02 11:57:11,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 53 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:57:11,963 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 196 transitions. [2024-12-02 11:57:11,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-12-02 11:57:11,964 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:57:11,964 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, 1, 1] [2024-12-02 11:57:11,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-12-02 11:57:12,164 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:57:12,165 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:57:12,165 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:57:12,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1705676116, now seen corresponding path program 1 times [2024-12-02 11:57:12,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:57:12,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96948771] [2024-12-02 11:57:12,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:57:12,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:57:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:57:15,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:57:15,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:57:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96948771] [2024-12-02 11:57:15,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96948771] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:57:15,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599747581] [2024-12-02 11:57:15,086 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 11:57:15,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:57:15,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:57:15,088 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:57:15,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 11:57:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 11:57:15,230 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-12-02 11:57:15,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:57:15,258 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 11:57:16,108 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-12-02 11:57:16,109 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 11:57:16,228 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 11:57:16,579 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 11:57:16,641 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 11:57:18,141 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 11:57:18,141 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 42 treesize of output 31 [2024-12-02 11:57:18,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:57:18,228 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 11:57:18,350 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 11:57:18,350 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 59 treesize of output 52 [2024-12-02 11:57:18,382 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 11:57:19,166 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-12-02 11:57:19,167 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 1 case distinctions, treesize of input 18 treesize of output 21 [2024-12-02 11:57:19,424 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-12-02 11:57:19,425 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 20 treesize of output 22 [2024-12-02 11:57:19,784 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 11:57:19,859 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 34 treesize of output 25 [2024-12-02 11:57:19,930 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 22 [2024-12-02 11:57:20,016 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 57 treesize of output 29 [2024-12-02 11:57:22,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 11:57:22,829 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 0 case distinctions, treesize of input 17 treesize of output 7 [2024-12-02 11:57:23,530 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 11:57:23,530 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 31 [2024-12-02 11:57:23,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-12-02 11:57:24,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:57:24,244 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:57:28,864 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:28,864 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 108 [2024-12-02 11:57:34,697 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= |c_ULTIMATE.start_main_~head~0#1.base| |c_ULTIMATE.start_main_~x~0#1.base|)) (.cse1 (forall ((v_prenex_16 Int) (v_ArrVal_1065 (Array Int Int)) (v_ArrVal_1064 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~head~0#1.offset| v_prenex_16) (< (+ 7 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1064) |c_ULTIMATE.start_main_~head~0#1.base|) v_prenex_16)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1065) |c_ULTIMATE.start_main_~head~0#1.base|) v_prenex_16))) (< v_prenex_16 0))))) (and (or .cse0 (and (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_120| Int) (v_ArrVal_1064 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~x~0#1.offset_120| 0) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_120|) (< 0 (+ 5 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1064) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_120|))))) .cse1)) (forall ((|v_ULTIMATE.start_main_~x~0#1.offset_120| Int) (v_ArrVal_1064 (Array Int Int))) (or (< |v_ULTIMATE.start_main_~x~0#1.offset_120| 0) (= |c_ULTIMATE.start_main_~x~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_120|) (< |c_ULTIMATE.start_main_~head~0#1.offset| |v_ULTIMATE.start_main_~x~0#1.offset_120|) (< 0 (+ 5 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1064) |c_ULTIMATE.start_main_~head~0#1.base|) |v_ULTIMATE.start_main_~x~0#1.offset_120|))))) (forall ((v_prenex_16 Int) (v_ArrVal_1065 (Array Int Int)) (v_ArrVal_1064 (Array Int Int))) (or (< |c_ULTIMATE.start_main_~head~0#1.offset| v_prenex_16) (< (+ 7 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1064) |c_ULTIMATE.start_main_~head~0#1.base|) v_prenex_16)) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1065) |c_ULTIMATE.start_main_~head~0#1.base|) v_prenex_16))) (< v_prenex_16 0) (= |c_ULTIMATE.start_main_~x~0#1.offset| v_prenex_16))) (or .cse0 .cse1))) is different from false [2024-12-02 11:57:57,286 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:57,286 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 46 treesize of output 47 [2024-12-02 11:57:57,322 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:57,323 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 39 [2024-12-02 11:57:57,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:57,418 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 258 treesize of output 257 [2024-12-02 11:57:57,566 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:57,566 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 766 treesize of output 741 [2024-12-02 11:57:57,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2024-12-02 11:57:57,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2024-12-02 11:57:57,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 38 [2024-12-02 11:57:57,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 34 [2024-12-02 11:57:58,607 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:58,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 47 [2024-12-02 11:57:58,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:58,645 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 11:57:58,657 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:57:58,757 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:58,757 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 64 treesize of output 67 [2024-12-02 11:57:58,786 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:57:58,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:58,887 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 94 treesize of output 93 [2024-12-02 11:57:58,914 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 18 treesize of output 16 [2024-12-02 11:57:58,937 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-12-02 11:57:59,731 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:59,731 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 23 treesize of output 24 [2024-12-02 11:57:59,742 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:57:59,816 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:57:59,816 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 34 treesize of output 37 [2024-12-02 11:57:59,872 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 11 treesize of output 9 [2024-12-02 11:58:00,143 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:58:00,144 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 23 treesize of output 24 [2024-12-02 11:58:00,157 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 11:58:00,226 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:58:00,226 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 34 treesize of output 37 [2024-12-02 11:58:00,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2024-12-02 11:58:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:58:25,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599747581] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 11:58:25,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 11:58:25,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 20] total 51 [2024-12-02 11:58:25,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401112032] [2024-12-02 11:58:25,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 11:58:25,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-12-02 11:58:25,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 11:58:25,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-12-02 11:58:25,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2345, Unknown=11, NotChecked=98, Total=2652 [2024-12-02 11:58:25,926 INFO L87 Difference]: Start difference. First operand 178 states and 196 transitions. Second operand has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:58:53,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 11:58:53,738 INFO L93 Difference]: Finished difference Result 229 states and 248 transitions. [2024-12-02 11:58:53,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-12-02 11:58:53,739 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-12-02 11:58:53,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 11:58:53,741 INFO L225 Difference]: With dead ends: 229 [2024-12-02 11:58:53,741 INFO L226 Difference]: Without dead ends: 229 [2024-12-02 11:58:53,742 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1396 ImplicationChecksByTransitivity, 62.6s TimeCoverageRelationStatistics Valid=564, Invalid=5590, Unknown=12, NotChecked=154, Total=6320 [2024-12-02 11:58:53,742 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 349 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 2963 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 198 IncrementalHoareTripleChecker+Unchecked, 17.6s IncrementalHoareTripleChecker+Time [2024-12-02 11:58:53,743 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1352 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2963 Invalid, 0 Unknown, 198 Unchecked, 17.6s Time] [2024-12-02 11:58:53,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-12-02 11:58:53,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 177. [2024-12-02 11:58:53,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:58:53,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 194 transitions. [2024-12-02 11:58:53,746 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 194 transitions. Word has length 33 [2024-12-02 11:58:53,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 11:58:53,746 INFO L471 AbstractCegarLoop]: Abstraction has 177 states and 194 transitions. [2024-12-02 11:58:53,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 11:58:53,746 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 194 transitions. [2024-12-02 11:58:53,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 11:58:53,747 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 11:58:53,747 INFO L218 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 11:58:53,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-12-02 11:58:53,947 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-12-02 11:58:53,947 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 11:58:53,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 11:58:53,948 INFO L85 PathProgramCache]: Analyzing trace with hash 10721334, now seen corresponding path program 3 times [2024-12-02 11:58:53,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 11:58:53,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957111981] [2024-12-02 11:58:53,948 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:58:53,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 11:58:53,967 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 11:58:53,967 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:58:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:58:55,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 11:58:55,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957111981] [2024-12-02 11:58:55,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957111981] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 11:58:55,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938673912] [2024-12-02 11:58:55,682 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-12-02 11:58:55,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 11:58:55,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 11:58:55,684 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 11:58:55,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 11:58:55,812 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-12-02 11:58:55,812 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-12-02 11:58:55,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-12-02 11:58:55,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 11:58:56,290 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 11:58:56,547 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 11:58:56,559 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 11:58:56,907 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 11:58:57,469 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 11:58:57,469 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 18 treesize of output 17 [2024-12-02 11:58:57,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-12-02 11:58:57,896 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 11:58:57,896 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 28 treesize of output 27 [2024-12-02 11:58:57,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-12-02 11:58:58,773 INFO L349 Elim1Store]: treesize reduction 78, result has 41.8 percent of original size [2024-12-02 11:58:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 36 treesize of output 78 [2024-12-02 11:58:59,531 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-12-02 11:58:59,531 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 1 case distinctions, treesize of input 74 treesize of output 62 [2024-12-02 11:59:02,056 INFO L349 Elim1Store]: treesize reduction 36, result has 29.4 percent of original size [2024-12-02 11:59:02,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 3 case distinctions, treesize of input 162 treesize of output 136 [2024-12-02 11:59:02,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-12-02 11:59:03,088 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 11:59:03,089 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 143 treesize of output 116 [2024-12-02 11:59:05,908 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 128 treesize of output 84 [2024-12-02 11:59:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 11:59:07,347 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 11:59:07,488 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1185 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~x~0#1.base| v_ArrVal_1185) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 11:59:07,524 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1185 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_1185) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 11:59:07,548 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1185 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$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_1185) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) 1)) is different from false [2024-12-02 11:59:08,324 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:59:08,324 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 21 treesize of output 25 [2024-12-02 11:59:09,652 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:59:09,653 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 30 treesize of output 31 [2024-12-02 11:59:09,710 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:59:09,710 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 190 treesize of output 189 [2024-12-02 11:59:09,759 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:59:09,759 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 88 treesize of output 80 [2024-12-02 11:59:09,775 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2024-12-02 11:59:17,678 WARN L286 SmtUtils]: Spent 6.07s on a formula simplification that was a NOOP. DAG size: 649 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-12-02 11:59:17,678 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 11:59:17,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 331 treesize of output 1519 [2024-12-02 12:06:43,500 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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 12:06:43,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 101 [2024-12-02 12:06:43,501 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2024-12-02 12:06:43,508 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 12:06:43,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 12:06:43,702 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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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.assertTerm(Scriptor.java:147) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.assertTerm(DiffWrapperScript.java:111) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.assertTerm(WrapperScript.java:158) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SimplifyDDA2.simplify(SimplifyDDA2.java:584) 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.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.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) ... 60 more [2024-12-02 12:06:43,707 INFO L158 Benchmark]: Toolchain (without parser) took 766274.93ms. Allocated memory was 142.6MB in the beginning and 469.8MB in the end (delta: 327.2MB). Free memory was 117.0MB in the beginning and 207.5MB in the end (delta: -90.5MB). Peak memory consumption was 287.8MB. Max. memory is 16.1GB. [2024-12-02 12:06:43,708 INFO L158 Benchmark]: CDTParser took 0.40ms. Allocated memory is still 142.6MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:06:43,708 INFO L158 Benchmark]: CACSL2BoogieTranslator took 422.28ms. Allocated memory is still 142.6MB. Free memory was 116.8MB in the beginning and 99.3MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 12:06:43,708 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.67ms. Allocated memory is still 142.6MB. Free memory was 99.3MB in the beginning and 97.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-12-02 12:06:43,708 INFO L158 Benchmark]: Boogie Preprocessor took 47.97ms. Allocated memory is still 142.6MB. Free memory was 97.8MB in the beginning and 95.5MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-12-02 12:06:43,709 INFO L158 Benchmark]: RCFGBuilder took 578.72ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 73.5MB in the end (delta: 21.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-12-02 12:06:43,709 INFO L158 Benchmark]: TraceAbstraction took 765177.13ms. Allocated memory was 142.6MB in the beginning and 469.8MB in the end (delta: 327.2MB). Free memory was 73.0MB in the beginning and 207.5MB in the end (delta: -134.5MB). Peak memory consumption was 245.8MB. Max. memory is 16.1GB. [2024-12-02 12:06:43,710 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40ms. Allocated memory is still 142.6MB. Free memory is still 83.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 422.28ms. Allocated memory is still 142.6MB. Free memory was 116.8MB in the beginning and 99.3MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.67ms. Allocated memory is still 142.6MB. Free memory was 99.3MB in the beginning and 97.8MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 47.97ms. Allocated memory is still 142.6MB. Free memory was 97.8MB in the beginning and 95.5MB in the end (delta: 2.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 578.72ms. Allocated memory is still 142.6MB. Free memory was 95.5MB in the beginning and 73.5MB in the end (delta: 21.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 765177.13ms. Allocated memory was 142.6MB in the beginning and 469.8MB in the end (delta: 327.2MB). Free memory was 73.0MB in the beginning and 207.5MB in the end (delta: -134.5MB). Peak memory consumption was 245.8MB. 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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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 b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 12:06:45,691 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 12:06:45,779 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-12-02 12:06:45,787 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 12:06:45,787 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 12:06:45,811 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 12:06:45,812 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 12:06:45,812 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 12:06:45,813 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 12:06:45,813 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 12:06:45,813 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 12:06:45,813 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 12:06:45,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 12:06:45,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 12:06:45,814 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 12:06:45,815 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:06:45,815 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:06:45,816 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:06:45,816 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2024-12-02 12:06:45,816 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-12-02 12:06:45,817 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 12:06:45,817 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 12:06:45,817 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 12:06:45,817 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 12:06:45,817 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_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/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 -> b63900034700ff8018e29578512f73f88317ae4b603a38b2f2f558c77b57812d [2024-12-02 12:06:46,105 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 12:06:46,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 12:06:46,118 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 12:06:46,119 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 12:06:46,119 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 12:06:46,121 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2024-12-02 12:06:48,942 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/64d3b78df/9b5c7fdea4ba4985926f4ef054d673a8/FLAG4454178de [2024-12-02 12:06:49,178 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 12:06:49,179 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/sv-benchmarks/c/forester-heap/sll-simple-white-blue-1.i [2024-12-02 12:06:49,192 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/64d3b78df/9b5c7fdea4ba4985926f4ef054d673a8/FLAG4454178de [2024-12-02 12:06:49,207 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/data/64d3b78df/9b5c7fdea4ba4985926f4ef054d673a8 [2024-12-02 12:06:49,210 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 12:06:49,212 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 12:06:49,213 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 12:06:49,213 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 12:06:49,217 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 12:06:49,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69880e83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49, skipping insertion in model container [2024-12-02 12:06:49,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,251 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 12:06:49,515 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:06:49,528 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 12:06:49,576 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 12:06:49,604 INFO L204 MainTranslator]: Completed translation [2024-12-02 12:06:49,604 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49 WrapperNode [2024-12-02 12:06:49,605 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 12:06:49,606 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 12:06:49,606 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 12:06:49,606 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 12:06:49,612 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,650 INFO L138 Inliner]: procedures = 122, calls = 32, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2024-12-02 12:06:49,650 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 12:06:49,651 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 12:06:49,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 12:06:49,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 12:06:49,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,659 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,680 INFO L175 MemorySlicer]: Split 22 memory accesses to 2 slices as follows [2, 20]. 91 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 10 writes are split as follows [0, 10]. [2024-12-02 12:06:49,681 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,681 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,691 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,692 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,696 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,698 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,703 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 12:06:49,704 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 12:06:49,704 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 12:06:49,705 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 12:06:49,706 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (1/1) ... [2024-12-02 12:06:49,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 12:06:49,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:49,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 12:06:49,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 12:06:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-12-02 12:06:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-12-02 12:06:49,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-12-02 12:06:49,768 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 12:06:49,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 12:06:49,896 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 12:06:49,897 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 12:06:50,422 INFO L? ?]: Removed 99 outVars from TransFormulas that were not future-live. [2024-12-02 12:06:50,422 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 12:06:50,433 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 12:06:50,433 INFO L312 CfgBuilder]: Removed 7 assume(true) statements. [2024-12-02 12:06:50,434 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:06:50 BoogieIcfgContainer [2024-12-02 12:06:50,434 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 12:06:50,436 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 12:06:50,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 12:06:50,442 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 12:06:50,442 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:06:49" (1/3) ... [2024-12-02 12:06:50,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b60cdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:06:50, skipping insertion in model container [2024-12-02 12:06:50,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:06:49" (2/3) ... [2024-12-02 12:06:50,443 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b60cdb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:06:50, skipping insertion in model container [2024-12-02 12:06:50,443 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:06:50" (3/3) ... [2024-12-02 12:06:50,444 INFO L128 eAbstractionObserver]: Analyzing ICFG sll-simple-white-blue-1.i [2024-12-02 12:06:50,458 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 12:06:50,460 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll-simple-white-blue-1.i that has 1 procedures, 106 locations, 1 initial locations, 6 loop locations, and 45 error locations. [2024-12-02 12:06:50,496 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 12:06:50,510 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;@6994d8e6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 12:06:50,510 INFO L334 AbstractCegarLoop]: Starting to check reachability of 45 error locations. [2024-12-02 12:06:50,514 INFO L276 IsEmpty]: Start isEmpty. Operand has 106 states, 60 states have (on average 2.033333333333333) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 12:06:50,520 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:50,520 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 12:06:50,521 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:50,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 29857, now seen corresponding path program 1 times [2024-12-02 12:06:50,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27501601] [2024-12-02 12:06:50,536 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:50,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:50,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:50,539 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:50,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 12:06:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:50,617 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-12-02 12:06:50,621 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:50,665 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 12:06:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:50,687 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:50,687 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:50,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27501601] [2024-12-02 12:06:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27501601] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:50,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:06:50,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738205074] [2024-12-02 12:06:50,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:50,693 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:06:50,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:50,723 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:06:50,723 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:06:50,725 INFO L87 Difference]: Start difference. First operand has 106 states, 60 states have (on average 2.033333333333333) internal successors, (122), 105 states have internal predecessors, (122), 0 states have call successors, (0), 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 12:06:50,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:50,981 INFO L93 Difference]: Finished difference Result 129 states and 137 transitions. [2024-12-02 12:06:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:06:50,984 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 12:06:50,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:50,991 INFO L225 Difference]: With dead ends: 129 [2024-12-02 12:06:50,991 INFO L226 Difference]: Without dead ends: 127 [2024-12-02 12:06:50,992 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:06:50,995 INFO L435 NwaCegarLoop]: 92 mSDtfsCounter, 81 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:50,996 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:06:51,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-12-02 12:06:51,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2024-12-02 12:06:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 57 states have (on average 1.8596491228070176) internal successors, (106), 99 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:51,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2024-12-02 12:06:51,029 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 3 [2024-12-02 12:06:51,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:51,029 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2024-12-02 12:06:51,030 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 12:06:51,030 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2024-12-02 12:06:51,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2024-12-02 12:06:51,030 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:51,030 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1] [2024-12-02 12:06:51,042 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 12:06:51,231 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:51,231 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:51,232 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash 29858, now seen corresponding path program 1 times [2024-12-02 12:06:51,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:51,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357602242] [2024-12-02 12:06:51,232 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:51,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:51,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:51,234 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:51,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 12:06:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:51,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 12:06:51,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:51,304 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 12:06:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:51,317 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:51,317 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:51,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357602242] [2024-12-02 12:06:51,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357602242] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:51,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:51,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 12:06:51,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402535448] [2024-12-02 12:06:51,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:51,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 12:06:51,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:51,320 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 12:06:51,320 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:06:51,320 INFO L87 Difference]: Start difference. First operand 100 states and 106 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 12:06:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:51,610 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2024-12-02 12:06:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 12:06:51,611 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 12:06:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:51,612 INFO L225 Difference]: With dead ends: 125 [2024-12-02 12:06:51,612 INFO L226 Difference]: Without dead ends: 125 [2024-12-02 12:06:51,612 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 12:06:51,613 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 81 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:51,613 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 113 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:06:51,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-12-02 12:06:51,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2024-12-02 12:06:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 57 states have (on average 1.8245614035087718) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:51,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2024-12-02 12:06:51,621 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 3 [2024-12-02 12:06:51,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:51,622 INFO L471 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2024-12-02 12:06:51,622 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 12:06:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2024-12-02 12:06:51,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 12:06:51,622 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:51,623 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:51,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-12-02 12:06:51,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:51,823 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:51,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:51,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140808, now seen corresponding path program 1 times [2024-12-02 12:06:51,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:51,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [885629687] [2024-12-02 12:06:51,825 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:51,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:51,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:51,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:51,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 12:06:51,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:51,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 12:06:51,907 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:51,981 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 12:06:51,982 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 12:06:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:51,991 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:51,991 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:51,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885629687] [2024-12-02 12:06:51,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885629687] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:51,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:51,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 12:06:51,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559636689] [2024-12-02 12:06:51,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:51,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:06:51,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:51,992 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:06:51,992 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:06:51,992 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:52,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:52,372 INFO L93 Difference]: Finished difference Result 96 states and 106 transitions. [2024-12-02 12:06:52,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:06:52,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 12:06:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:52,374 INFO L225 Difference]: With dead ends: 96 [2024-12-02 12:06:52,374 INFO L226 Difference]: Without dead ends: 96 [2024-12-02 12:06:52,374 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:06:52,375 INFO L435 NwaCegarLoop]: 37 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:52,375 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 46 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:06:52,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-12-02 12:06:52,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2024-12-02 12:06:52,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 66 states have (on average 1.606060606060606) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:52,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2024-12-02 12:06:52,382 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 9 [2024-12-02 12:06:52,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:52,383 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2024-12-02 12:06:52,383 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:52,383 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2024-12-02 12:06:52,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-12-02 12:06:52,383 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:52,383 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:52,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 12:06:52,584 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:52,584 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:52,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:52,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1837140809, now seen corresponding path program 1 times [2024-12-02 12:06:52,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:52,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [236931960] [2024-12-02 12:06:52,585 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:52,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:52,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:52,588 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:52,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 12:06:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:52,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-12-02 12:06:52,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:52,667 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 12:06:52,674 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 12:06:52,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 12:06:52,814 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 12:06:52,828 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 12:06:52,828 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 12:06:52,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:52,845 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:52,845 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:52,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236931960] [2024-12-02 12:06:52,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236931960] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:52,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:52,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:06:52,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855040185] [2024-12-02 12:06:52,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:52,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:06:52,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:52,846 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:06:52,847 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:06:52,847 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:53,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:53,218 INFO L93 Difference]: Finished difference Result 113 states and 126 transitions. [2024-12-02 12:06:53,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:06:53,218 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-12-02 12:06:53,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:53,219 INFO L225 Difference]: With dead ends: 113 [2024-12-02 12:06:53,219 INFO L226 Difference]: Without dead ends: 113 [2024-12-02 12:06:53,219 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:06:53,220 INFO L435 NwaCegarLoop]: 38 mSDtfsCounter, 133 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:53,220 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 66 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:06:53,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-12-02 12:06:53,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2024-12-02 12:06:53,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 85 states have (on average 1.4470588235294117) internal successors, (123), 110 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:53,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2024-12-02 12:06:53,226 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 9 [2024-12-02 12:06:53,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:53,227 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2024-12-02 12:06:53,227 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:53,227 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2024-12-02 12:06:53,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 12:06:53,227 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:53,227 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:53,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 12:06:53,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:53,428 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:53,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1479989770, now seen corresponding path program 1 times [2024-12-02 12:06:53,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:53,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619358247] [2024-12-02 12:06:53,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:53,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:53,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:53,431 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:53,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 12:06:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:53,502 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-12-02 12:06:53,503 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:53,509 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 12:06:53,523 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 12:06:53,545 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 12:06:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:53,571 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:53,572 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:53,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619358247] [2024-12-02 12:06:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619358247] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:53,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:53,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:06:53,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181218512] [2024-12-02 12:06:53,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:53,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:06:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:53,573 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:06:53,573 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:06:53,573 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 12:06:54,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:54,052 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2024-12-02 12:06:54,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:06:54,052 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 12:06:54,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:54,053 INFO L225 Difference]: With dead ends: 112 [2024-12-02 12:06:54,053 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 12:06:54,053 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 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 12:06:54,054 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 26 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:54,054 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 194 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:06:54,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 12:06:54,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2024-12-02 12:06:54,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.4352941176470588) internal successors, (122), 109 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:54,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 122 transitions. [2024-12-02 12:06:54,062 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 122 transitions. Word has length 13 [2024-12-02 12:06:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:54,062 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 122 transitions. [2024-12-02 12:06:54,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 12:06:54,062 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 122 transitions. [2024-12-02 12:06:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-12-02 12:06:54,063 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:54,063 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:54,072 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 12:06:54,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:54,263 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:54,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:54,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1479989771, now seen corresponding path program 1 times [2024-12-02 12:06:54,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:54,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [613173352] [2024-12-02 12:06:54,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:54,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:54,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:54,266 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:54,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 12:06:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:54,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 12:06:54,345 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:54,352 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 12:06:54,376 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:06:54,383 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 12:06:54,421 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 12:06:54,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:54,466 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:54,466 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:54,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613173352] [2024-12-02 12:06:54,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613173352] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:54,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:54,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:06:54,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309554365] [2024-12-02 12:06:54,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:54,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:06:54,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:54,467 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:06:54,467 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:06:54,467 INFO L87 Difference]: Start difference. First operand 110 states and 122 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 12:06:54,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:54,885 INFO L93 Difference]: Finished difference Result 108 states and 121 transitions. [2024-12-02 12:06:54,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:06:54,886 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 12:06:54,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:54,886 INFO L225 Difference]: With dead ends: 108 [2024-12-02 12:06:54,886 INFO L226 Difference]: Without dead ends: 108 [2024-12-02 12:06:54,886 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:06:54,887 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 10 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:54,887 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 239 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 12:06:54,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-12-02 12:06:54,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-12-02 12:06:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 99 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:54,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 111 transitions. [2024-12-02 12:06:54,892 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 111 transitions. Word has length 13 [2024-12-02 12:06:54,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:54,892 INFO L471 AbstractCegarLoop]: Abstraction has 100 states and 111 transitions. [2024-12-02 12:06:54,893 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 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 12:06:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 111 transitions. [2024-12-02 12:06:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-12-02 12:06:54,893 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:54,894 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:54,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 12:06:55,094 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:55,094 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:55,095 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:55,095 INFO L85 PathProgramCache]: Analyzing trace with hash 537622198, now seen corresponding path program 1 times [2024-12-02 12:06:55,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:55,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [805297101] [2024-12-02 12:06:55,095 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:55,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:55,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:55,097 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:55,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 12:06:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:55,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-12-02 12:06:55,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:55,169 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:06:55,174 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:06:55,194 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 12:06:55,204 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 12:06:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:55,278 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:55,278 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:55,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805297101] [2024-12-02 12:06:55,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805297101] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:55,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:55,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 12:06:55,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701097141] [2024-12-02 12:06:55,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:55,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 12:06:55,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:55,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 12:06:55,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:06:55,279 INFO L87 Difference]: Start difference. First operand 100 states and 111 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:55,608 INFO L93 Difference]: Finished difference Result 112 states and 125 transitions. [2024-12-02 12:06:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 12:06:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-12-02 12:06:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:55,610 INFO L225 Difference]: With dead ends: 112 [2024-12-02 12:06:55,610 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 12:06:55,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 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 12:06:55,611 INFO L435 NwaCegarLoop]: 75 mSDtfsCounter, 22 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:55,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 226 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:06:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 12:06:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2024-12-02 12:06:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 85 states have (on average 1.4) internal successors, (119), 105 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-12-02 12:06:55,615 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 16 [2024-12-02 12:06:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:55,615 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-12-02 12:06:55,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:55,616 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-12-02 12:06:55,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-12-02 12:06:55,616 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:55,616 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:55,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 12:06:55,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:55,817 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:55,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:55,817 INFO L85 PathProgramCache]: Analyzing trace with hash 602883967, now seen corresponding path program 1 times [2024-12-02 12:06:55,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:55,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516367268] [2024-12-02 12:06:55,817 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:55,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:55,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:55,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:55,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 12:06:55,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:55,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 12:06:55,897 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:55,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:06:55,927 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 12:06:55,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:55,976 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:55,976 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:55,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516367268] [2024-12-02 12:06:55,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516367268] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:55,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:55,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 12:06:55,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878792883] [2024-12-02 12:06:55,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:55,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 12:06:55,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:55,977 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 12:06:55,977 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-12-02 12:06:55,977 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:56,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:56,285 INFO L93 Difference]: Finished difference Result 129 states and 144 transitions. [2024-12-02 12:06:56,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 12:06:56,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-12-02 12:06:56,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:56,286 INFO L225 Difference]: With dead ends: 129 [2024-12-02 12:06:56,286 INFO L226 Difference]: Without dead ends: 129 [2024-12-02 12:06:56,286 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:06:56,287 INFO L435 NwaCegarLoop]: 70 mSDtfsCounter, 28 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:56,287 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 230 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 12:06:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-12-02 12:06:56,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 109. [2024-12-02 12:06:56,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 88 states have (on average 1.3863636363636365) internal successors, (122), 108 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:56,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 122 transitions. [2024-12-02 12:06:56,292 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 122 transitions. Word has length 18 [2024-12-02 12:06:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:56,292 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 122 transitions. [2024-12-02 12:06:56,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 122 transitions. [2024-12-02 12:06:56,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 12:06:56,293 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:56,293 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:56,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 12:06:56,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:56,494 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:56,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:56,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1511596969, now seen corresponding path program 1 times [2024-12-02 12:06:56,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:56,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1000524952] [2024-12-02 12:06:56,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:56,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:56,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:56,496 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:56,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 12:06:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:56,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-12-02 12:06:56,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:56,624 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-12-02 12:06:56,625 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 12:06:56,660 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 12:06:56,731 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 12:06:56,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:56,764 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:56,764 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:56,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000524952] [2024-12-02 12:06:56,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000524952] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:56,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:56,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 12:06:56,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069234079] [2024-12-02 12:06:56,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:56,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 12:06:56,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:56,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 12:06:56,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:06:56,765 INFO L87 Difference]: Start difference. First operand 109 states and 122 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:57,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:57,473 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2024-12-02 12:06:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 12:06:57,474 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 12:06:57,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:57,474 INFO L225 Difference]: With dead ends: 131 [2024-12-02 12:06:57,475 INFO L226 Difference]: Without dead ends: 131 [2024-12-02 12:06:57,475 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-12-02 12:06:57,475 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 150 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:57,476 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 143 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 12:06:57,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-12-02 12:06:57,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 113. [2024-12-02 12:06:57,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.391304347826087) internal successors, (128), 112 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:57,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 128 transitions. [2024-12-02 12:06:57,480 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 128 transitions. Word has length 19 [2024-12-02 12:06:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:57,480 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 128 transitions. [2024-12-02 12:06:57,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 128 transitions. [2024-12-02 12:06:57,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-12-02 12:06:57,481 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:57,481 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 12:06:57,489 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 12:06:57,682 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:57,682 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:57,682 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:57,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1511596970, now seen corresponding path program 1 times [2024-12-02 12:06:57,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:57,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1646152200] [2024-12-02 12:06:57,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:57,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:57,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:57,685 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:57,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 12:06:57,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:57,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-12-02 12:06:57,761 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:57,765 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 12:06:57,844 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 12:06:57,844 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 12:06:57,852 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 12:06:57,894 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 12:06:57,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:06:57,996 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 12:06:58,006 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 12:06:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:58,052 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:58,052 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:58,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646152200] [2024-12-02 12:06:58,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646152200] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:58,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:58,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 12:06:58,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60712165] [2024-12-02 12:06:58,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:58,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-12-02 12:06:58,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:58,053 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-12-02 12:06:58,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:06:58,053 INFO L87 Difference]: Start difference. First operand 113 states and 128 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:59,016 INFO L93 Difference]: Finished difference Result 141 states and 157 transitions. [2024-12-02 12:06:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-12-02 12:06:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-12-02 12:06:59,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:59,017 INFO L225 Difference]: With dead ends: 141 [2024-12-02 12:06:59,017 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 12:06:59,018 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:06:59,018 INFO L435 NwaCegarLoop]: 46 mSDtfsCounter, 248 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:59,019 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 219 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 12:06:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 12:06:59,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2024-12-02 12:06:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.3829787234042554) internal successors, (130), 114 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 12:06:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 130 transitions. [2024-12-02 12:06:59,023 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 130 transitions. Word has length 19 [2024-12-02 12:06:59,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:59,023 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 130 transitions. [2024-12-02 12:06:59,023 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:59,023 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 130 transitions. [2024-12-02 12:06:59,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-12-02 12:06:59,024 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:59,024 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] [2024-12-02 12:06:59,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 12:06:59,224 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:59,225 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr44ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:59,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:59,225 INFO L85 PathProgramCache]: Analyzing trace with hash -743521535, now seen corresponding path program 1 times [2024-12-02 12:06:59,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:59,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505808707] [2024-12-02 12:06:59,225 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:59,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:59,226 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:59,227 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:59,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 12:06:59,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:59,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 12:06:59,307 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:59,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:06:59,332 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:06:59,332 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:06:59,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505808707] [2024-12-02 12:06:59,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505808707] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:06:59,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:06:59,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 12:06:59,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984896930] [2024-12-02 12:06:59,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:06:59,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 12:06:59,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:06:59,333 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 12:06:59,333 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 12:06:59,333 INFO L87 Difference]: Start difference. First operand 115 states and 130 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:06:59,556 INFO L93 Difference]: Finished difference Result 119 states and 133 transitions. [2024-12-02 12:06:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 12:06:59,556 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-12-02 12:06:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:06:59,557 INFO L225 Difference]: With dead ends: 119 [2024-12-02 12:06:59,557 INFO L226 Difference]: Without dead ends: 119 [2024-12-02 12:06:59,557 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 12:06:59,557 INFO L435 NwaCegarLoop]: 58 mSDtfsCounter, 110 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 12:06:59,557 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 95 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 12:06:59,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-12-02 12:06:59,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 115. [2024-12-02 12:06:59,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 94 states have (on average 1.372340425531915) internal successors, (129), 114 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:59,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 129 transitions. [2024-12-02 12:06:59,560 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 129 transitions. Word has length 22 [2024-12-02 12:06:59,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:06:59,560 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 129 transitions. [2024-12-02 12:06:59,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:06:59,560 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 129 transitions. [2024-12-02 12:06:59,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-12-02 12:06:59,561 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:06:59,561 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] [2024-12-02 12:06:59,568 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 12:06:59,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:59,761 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr36ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:06:59,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:06:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1672726513, now seen corresponding path program 1 times [2024-12-02 12:06:59,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:06:59,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278067192] [2024-12-02 12:06:59,762 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:06:59,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:06:59,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:06:59,764 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:06:59,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 12:06:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:06:59,856 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 12:06:59,858 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:06:59,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:06:59,950 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 12:06:59,951 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 12:06:59,979 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 12:06:59,997 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 12:07:00,004 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:07:00,011 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 12:07:00,094 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 12:07:00,102 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 12:07:00,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:07:00,168 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:07:00,168 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:07:00,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278067192] [2024-12-02 12:07:00,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278067192] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:07:00,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:07:00,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 12:07:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854937653] [2024-12-02 12:07:00,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:07:00,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 12:07:00,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:07:00,169 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 12:07:00,169 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-12-02 12:07:00,170 INFO L87 Difference]: Start difference. First operand 115 states and 129 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:07:01,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:07:01,125 INFO L93 Difference]: Finished difference Result 170 states and 187 transitions. [2024-12-02 12:07:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 12:07:01,126 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 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 23 [2024-12-02 12:07:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:07:01,127 INFO L225 Difference]: With dead ends: 170 [2024-12-02 12:07:01,127 INFO L226 Difference]: Without dead ends: 170 [2024-12-02 12:07:01,127 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-12-02 12:07:01,128 INFO L435 NwaCegarLoop]: 59 mSDtfsCounter, 172 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-12-02 12:07:01,128 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 375 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-12-02 12:07:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-12-02 12:07:01,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 126. [2024-12-02 12:07:01,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 125 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:07:01,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 141 transitions. [2024-12-02 12:07:01,131 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 141 transitions. Word has length 23 [2024-12-02 12:07:01,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:07:01,131 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 141 transitions. [2024-12-02 12:07:01,131 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:07:01,131 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 141 transitions. [2024-12-02 12:07:01,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 12:07:01,132 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:07:01,132 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 12:07:01,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 12:07:01,333 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:07:01,333 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:07:01,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:07:01,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1200275603, now seen corresponding path program 1 times [2024-12-02 12:07:01,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:07:01,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1349580663] [2024-12-02 12:07:01,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:07:01,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:07:01,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:07:01,335 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:07:01,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 12:07:01,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:07:01,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-12-02 12:07:01,429 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:07:01,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:07:01,534 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 12:07:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:07:01,578 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 12:07:01,578 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:07:01,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349580663] [2024-12-02 12:07:01,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349580663] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 12:07:01,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 12:07:01,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-12-02 12:07:01,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344026868] [2024-12-02 12:07:01,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 12:07:01,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 12:07:01,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:07:01,579 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 12:07:01,579 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-12-02 12:07:01,579 INFO L87 Difference]: Start difference. First operand 126 states and 141 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 12:07:02,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:07:02,168 INFO L93 Difference]: Finished difference Result 167 states and 184 transitions. [2024-12-02 12:07:02,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 12:07:02,169 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 12:07:02,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:07:02,169 INFO L225 Difference]: With dead ends: 167 [2024-12-02 12:07:02,169 INFO L226 Difference]: Without dead ends: 167 [2024-12-02 12:07:02,169 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-12-02 12:07:02,170 INFO L435 NwaCegarLoop]: 84 mSDtfsCounter, 95 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-12-02 12:07:02,170 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 358 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-12-02 12:07:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-12-02 12:07:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 130. [2024-12-02 12:07:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 129 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:07:02,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 145 transitions. [2024-12-02 12:07:02,172 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 145 transitions. Word has length 24 [2024-12-02 12:07:02,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:07:02,173 INFO L471 AbstractCegarLoop]: Abstraction has 130 states and 145 transitions. [2024-12-02 12:07:02,173 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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 12:07:02,173 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 145 transitions. [2024-12-02 12:07:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 12:07:02,173 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:07:02,173 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] [2024-12-02 12:07:02,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 12:07:02,374 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:07:02,374 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:07:02,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:07:02,374 INFO L85 PathProgramCache]: Analyzing trace with hash -287365889, now seen corresponding path program 1 times [2024-12-02 12:07:02,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:07:02,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153495416] [2024-12-02 12:07:02,375 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:07:02,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:07:02,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:07:02,377 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:07:02,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 12:07:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:07:02,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-12-02 12:07:02,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:07:02,470 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 12:07:02,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:07:02,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 12:07:02,509 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 12:07:02,519 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 12:07:02,575 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-12-02 12:07:02,575 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 12:07:02,599 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 12:07:02,608 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 12:07:02,622 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 12:07:02,632 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 12:07:02,988 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 12:07:02,988 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:07:03,338 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:07:03,338 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 13 treesize of output 17 [2024-12-02 12:07:03,349 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:07:03,349 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 13 treesize of output 17 [2024-12-02 12:07:18,333 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (bvadd |c_ULTIMATE.start_main_~head~0#1.offset| (_ bv4 32)))) (and (forall ((v_ArrVal_337 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= v_ArrVal_337 (store (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~head~0#1.base|) .cse0 (select v_ArrVal_337 .cse0)))) (forall ((v_arrayElimArr_1 (Array (_ BitVec 32) (_ BitVec 32))) (|v_ULTIMATE.start_main_~x~0#1.base_92| (_ BitVec 32)) (|ULTIMATE.start_main_~x~0#1.offset| (_ BitVec 32))) (or (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_92|) (_ bv0 1))) (= (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_main_~head~0#1.base| v_ArrVal_337) |v_ULTIMATE.start_main_~x~0#1.base_92| v_arrayElimArr_1) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|) (_ bv0 32)) (not (= (select v_arrayElimArr_1 |ULTIMATE.start_main_~x~0#1.offset|) |c_ULTIMATE.start_main_~head~0#1.offset|)))))) (forall ((|v_ULTIMATE.start_main_~x~0#1.base_92| (_ BitVec 32)) (v_arrayElimArr_2 (Array (_ BitVec 32) (_ BitVec 32))) (|ULTIMATE.start_main_~x~0#1.offset| (_ BitVec 32)) (v_ArrVal_336 (Array (_ BitVec 32) (_ BitVec 32)))) (or (not (= v_ArrVal_336 (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~head~0#1.base|) .cse0 (select v_ArrVal_336 .cse0)))) (not (= |c_ULTIMATE.start_main_~head~0#1.base| (select v_arrayElimArr_2 |ULTIMATE.start_main_~x~0#1.offset|))) (= (_ bv0 32) (select (select (store (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_~head~0#1.base| v_ArrVal_336) |v_ULTIMATE.start_main_~x~0#1.base_92| v_arrayElimArr_2) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|)) (not (= (select |c_#valid| |v_ULTIMATE.start_main_~x~0#1.base_92|) (_ bv0 1))))))) is different from false [2024-12-02 12:07:18,390 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 38 treesize of output 36 [2024-12-02 12:07:18,466 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:07:18,467 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 12 treesize of output 16 [2024-12-02 12:07:18,498 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 12:07:18,508 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 32 treesize of output 30 [2024-12-02 12:07:18,537 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 12:07:18,537 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:07:18,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153495416] [2024-12-02 12:07:18,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153495416] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:07:18,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:07:18,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2024-12-02 12:07:18,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119278568] [2024-12-02 12:07:18,537 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 12:07:18,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-12-02 12:07:18,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:07:18,538 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-12-02 12:07:18,539 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=260, Unknown=5, NotChecked=32, Total=342 [2024-12-02 12:07:18,539 INFO L87 Difference]: Start difference. First operand 130 states and 145 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:07:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 12:07:27,227 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2024-12-02 12:07:27,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-12-02 12:07:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-12-02 12:07:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 12:07:27,229 INFO L225 Difference]: With dead ends: 157 [2024-12-02 12:07:27,229 INFO L226 Difference]: Without dead ends: 157 [2024-12-02 12:07:27,229 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=92, Invalid=557, Unknown=5, NotChecked=48, Total=702 [2024-12-02 12:07:27,230 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 108 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-12-02 12:07:27,230 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 491 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 663 Invalid, 0 Unknown, 119 Unchecked, 6.8s Time] [2024-12-02 12:07:27,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-12-02 12:07:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 133. [2024-12-02 12:07:27,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 132 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 12:07:27,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 148 transitions. [2024-12-02 12:07:27,233 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 148 transitions. Word has length 24 [2024-12-02 12:07:27,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 12:07:27,234 INFO L471 AbstractCegarLoop]: Abstraction has 133 states and 148 transitions. [2024-12-02 12:07:27,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:07:27,234 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 148 transitions. [2024-12-02 12:07:27,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-12-02 12:07:27,234 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 12:07:27,234 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] [2024-12-02 12:07:27,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 12:07:27,435 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:07:27,435 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 42 more)] === [2024-12-02 12:07:27,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 12:07:27,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1028665442, now seen corresponding path program 1 times [2024-12-02 12:07:27,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2024-12-02 12:07:27,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976287348] [2024-12-02 12:07:27,436 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 12:07:27,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 12:07:27,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 12:07:27,438 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 12:07:27,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fcc1f8f7-c8d9-492c-95d6-866e12fc10a4/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 12:07:27,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 12:07:27,529 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-12-02 12:07:27,532 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 12:07:27,549 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 12:07:28,048 INFO L349 Elim1Store]: treesize reduction 22, result has 35.3 percent of original size [2024-12-02 12:07:28,048 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 12:07:28,369 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 12:07:29,132 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-12-02 12:07:29,132 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 35 treesize of output 26 [2024-12-02 12:07:29,290 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-12-02 12:07:29,290 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 12:07:30,019 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 12:07:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:07:30,416 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 12:07:31,435 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_381 (Array (_ BitVec 32) (_ BitVec 32)))) (= (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_main_#t~mem4#1.base| v_ArrVal_381) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))) (_ bv0 1))) is different from false [2024-12-02 12:07:31,476 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_381 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$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_381) |c_ULTIMATE.start_main_~head~0#1.base|) |c_ULTIMATE.start_main_~head~0#1.offset|))))) is different from false [2024-12-02 12:07:31,538 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:07:31,538 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 22 treesize of output 23 [2024-12-02 12:07:31,624 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 12:07:31,625 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 38 treesize of output 41 [2024-12-02 12:07:31,659 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 9 treesize of output 7 [2024-12-02 12:07:57,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 12:07:57,374 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2024-12-02 12:07:57,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976287348] [2024-12-02 12:07:57,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976287348] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 12:07:57,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 12:07:57,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2024-12-02 12:07:57,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614882936] [2024-12-02 12:07:57,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 12:07:57,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-12-02 12:07:57,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2024-12-02 12:07:57,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-12-02 12:07:57,376 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=296, Unknown=9, NotChecked=74, Total=462 [2024-12-02 12:07:57,376 INFO L87 Difference]: Start difference. First operand 133 states and 148 transitions. Second operand has 22 states, 21 states have (on average 2.3333333333333335) internal successors, (49), 22 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 12:08:06,256 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, 1]