./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.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_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/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_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/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_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/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 a81d76a671fec08918102c7898e8919d02b265d05707efa1508363dab4714d44 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-12-02 07:28:03,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-12-02 07:28:03,489 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-12-02 07:28:03,493 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-12-02 07:28:03,493 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-12-02 07:28:03,512 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-12-02 07:28:03,512 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-12-02 07:28:03,512 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-12-02 07:28:03,513 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-12-02 07:28:03,513 INFO L153 SettingsManager]: * Use memory slicer=true [2024-12-02 07:28:03,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-12-02 07:28:03,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-12-02 07:28:03,513 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-12-02 07:28:03,513 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * Use SBE=true [2024-12-02 07:28:03,514 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * sizeof long=4 [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-12-02 07:28:03,514 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * sizeof long double=12 [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Use constant arrays=true [2024-12-02 07:28:03,515 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:28:03,515 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:28:03,515 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:28:03,516 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-12-02 07:28:03,516 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-12-02 07:28:03,517 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-12-02 07:28:03,517 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-12-02 07:28:03,517 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_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/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 -> a81d76a671fec08918102c7898e8919d02b265d05707efa1508363dab4714d44 [2024-12-02 07:28:03,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-12-02 07:28:03,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-12-02 07:28:03,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-12-02 07:28:03,720 INFO L270 PluginConnector]: Initializing CDTParser... [2024-12-02 07:28:03,721 INFO L274 PluginConnector]: CDTParser initialized [2024-12-02 07:28:03,722 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/../../sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2024-12-02 07:28:06,347 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/data/e129f3796/51e534a41ad046e9a10eb26b13baa1b9/FLAG50efaeb38 [2024-12-02 07:28:06,589 INFO L384 CDTParser]: Found 1 translation units. [2024-12-02 07:28:06,590 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/sv-benchmarks/c/list-simple/dll2c_remove_all_reverse.i [2024-12-02 07:28:06,601 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/data/e129f3796/51e534a41ad046e9a10eb26b13baa1b9/FLAG50efaeb38 [2024-12-02 07:28:06,910 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/data/e129f3796/51e534a41ad046e9a10eb26b13baa1b9 [2024-12-02 07:28:06,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-12-02 07:28:06,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-12-02 07:28:06,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-12-02 07:28:06,914 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-12-02 07:28:06,918 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-12-02 07:28:06,918 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:28:06" (1/1) ... [2024-12-02 07:28:06,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23c62671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:06, skipping insertion in model container [2024-12-02 07:28:06,919 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:28:06" (1/1) ... [2024-12-02 07:28:06,945 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-12-02 07:28:07,171 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:28:07,179 INFO L200 MainTranslator]: Completed pre-run [2024-12-02 07:28:07,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-12-02 07:28:07,241 INFO L204 MainTranslator]: Completed translation [2024-12-02 07:28:07,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07 WrapperNode [2024-12-02 07:28:07,242 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-12-02 07:28:07,243 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-12-02 07:28:07,243 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-12-02 07:28:07,243 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-12-02 07:28:07,249 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,258 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,275 INFO L138 Inliner]: procedures = 126, calls = 38, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 112 [2024-12-02 07:28:07,276 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-12-02 07:28:07,276 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-12-02 07:28:07,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-12-02 07:28:07,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-12-02 07:28:07,285 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,285 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,289 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,305 INFO L175 MemorySlicer]: Split 21 memory accesses to 3 slices as follows [2, 11, 8]. 52 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 10 writes are split as follows [0, 9, 1]. [2024-12-02 07:28:07,305 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,305 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,313 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,313 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,316 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,318 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,319 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,322 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-12-02 07:28:07,322 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-12-02 07:28:07,322 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-12-02 07:28:07,322 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-12-02 07:28:07,323 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (1/1) ... [2024-12-02 07:28:07,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-12-02 07:28:07,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:07,347 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-12-02 07:28:07,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-12-02 07:28:07,372 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-12-02 07:28:07,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-12-02 07:28:07,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-12-02 07:28:07,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-12-02 07:28:07,480 INFO L234 CfgBuilder]: Building ICFG [2024-12-02 07:28:07,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-12-02 07:28:07,753 INFO L? ?]: Removed 107 outVars from TransFormulas that were not future-live. [2024-12-02 07:28:07,753 INFO L283 CfgBuilder]: Performing block encoding [2024-12-02 07:28:07,762 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-12-02 07:28:07,762 INFO L312 CfgBuilder]: Removed 2 assume(true) statements. [2024-12-02 07:28:07,763 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:28:07 BoogieIcfgContainer [2024-12-02 07:28:07,763 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-12-02 07:28:07,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-12-02 07:28:07,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-12-02 07:28:07,769 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-12-02 07:28:07,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:28:06" (1/3) ... [2024-12-02 07:28:07,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b963704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:28:07, skipping insertion in model container [2024-12-02 07:28:07,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:28:07" (2/3) ... [2024-12-02 07:28:07,770 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b963704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:28:07, skipping insertion in model container [2024-12-02 07:28:07,770 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:28:07" (3/3) ... [2024-12-02 07:28:07,771 INFO L128 eAbstractionObserver]: Analyzing ICFG dll2c_remove_all_reverse.i [2024-12-02 07:28:07,781 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-12-02 07:28:07,783 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG dll2c_remove_all_reverse.i that has 2 procedures, 101 locations, 1 initial locations, 2 loop locations, and 44 error locations. [2024-12-02 07:28:07,815 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-12-02 07:28:07,824 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;@7d6f2cfc, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-12-02 07:28:07,825 INFO L334 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2024-12-02 07:28:07,828 INFO L276 IsEmpty]: Start isEmpty. Operand has 101 states, 53 states have (on average 2.0) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:07,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-02 07:28:07,832 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:07,832 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 07:28:07,833 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:07,836 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:07,837 INFO L85 PathProgramCache]: Analyzing trace with hash 893948658, now seen corresponding path program 1 times [2024-12-02 07:28:07,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:07,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385536859] [2024-12-02 07:28:07,843 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:07,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:07,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:08,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:08,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:08,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385536859] [2024-12-02 07:28:08,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385536859] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:08,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:08,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:28:08,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661039472] [2024-12-02 07:28:08,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:08,036 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:28:08,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:08,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:28:08,052 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:08,054 INFO L87 Difference]: Start difference. First operand has 101 states, 53 states have (on average 2.0) internal successors, (106), 97 states have internal predecessors, (106), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:08,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:08,163 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2024-12-02 07:28:08,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:28:08,165 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-02 07:28:08,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:08,170 INFO L225 Difference]: With dead ends: 97 [2024-12-02 07:28:08,170 INFO L226 Difference]: Without dead ends: 94 [2024-12-02 07:28:08,171 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:08,174 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:08,174 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 146 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-12-02 07:28:08,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-12-02 07:28:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 50 states have (on average 1.88) internal successors, (94), 90 states have internal predecessors, (94), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:08,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2024-12-02 07:28:08,204 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 6 [2024-12-02 07:28:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:08,204 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2024-12-02 07:28:08,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2024-12-02 07:28:08,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-12-02 07:28:08,205 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:08,205 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-12-02 07:28:08,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-12-02 07:28:08,205 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:08,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:08,206 INFO L85 PathProgramCache]: Analyzing trace with hash 893948659, now seen corresponding path program 1 times [2024-12-02 07:28:08,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:08,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651482488] [2024-12-02 07:28:08,206 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:08,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:08,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:08,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:08,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651482488] [2024-12-02 07:28:08,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651482488] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:08,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:08,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:28:08,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909467456] [2024-12-02 07:28:08,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:08,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:28:08,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:08,311 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:28:08,311 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:08,311 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:08,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:08,393 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2024-12-02 07:28:08,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:28:08,393 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-12-02 07:28:08,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:08,394 INFO L225 Difference]: With dead ends: 91 [2024-12-02 07:28:08,394 INFO L226 Difference]: Without dead ends: 91 [2024-12-02 07:28:08,395 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:08,395 INFO L435 NwaCegarLoop]: 90 mSDtfsCounter, 3 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:08,396 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 147 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:08,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-12-02 07:28:08,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-12-02 07:28:08,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 50 states have (on average 1.82) internal successors, (91), 87 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2024-12-02 07:28:08,402 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 6 [2024-12-02 07:28:08,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:08,403 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2024-12-02 07:28:08,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-12-02 07:28:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2024-12-02 07:28:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-12-02 07:28:08,404 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:08,404 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:08,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-12-02 07:28:08,404 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:08,404 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash 80530391, now seen corresponding path program 1 times [2024-12-02 07:28:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:08,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873589296] [2024-12-02 07:28:08,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:08,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:08,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:08,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:08,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873589296] [2024-12-02 07:28:08,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873589296] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:08,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:08,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:28:08,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869429006] [2024-12-02 07:28:08,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:08,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:28:08,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:08,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:28:08,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:08,493 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 07:28:08,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:08,508 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2024-12-02 07:28:08,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:28:08,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-12-02 07:28:08,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:08,509 INFO L225 Difference]: With dead ends: 102 [2024-12-02 07:28:08,509 INFO L226 Difference]: Without dead ends: 102 [2024-12-02 07:28:08,510 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:08,510 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 10 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:08,510 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 181 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:28:08,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-12-02 07:28:08,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2024-12-02 07:28:08,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 51 states have (on average 1.803921568627451) internal successors, (92), 88 states have internal predecessors, (92), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:08,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2024-12-02 07:28:08,518 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 14 [2024-12-02 07:28:08,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:08,518 INFO L471 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2024-12-02 07:28:08,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-12-02 07:28:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2024-12-02 07:28:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 07:28:08,519 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:08,519 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:08,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-12-02 07:28:08,519 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:08,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:08,520 INFO L85 PathProgramCache]: Analyzing trace with hash -193522429, now seen corresponding path program 1 times [2024-12-02 07:28:08,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:08,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167817538] [2024-12-02 07:28:08,520 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:08,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:28:08,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:08,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167817538] [2024-12-02 07:28:08,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167817538] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:08,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:08,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:28:08,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226694562] [2024-12-02 07:28:08,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:08,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:28:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:08,693 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:28:08,693 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:28:08,693 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:08,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:08,845 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2024-12-02 07:28:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:28:08,846 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-12-02 07:28:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:08,847 INFO L225 Difference]: With dead ends: 91 [2024-12-02 07:28:08,847 INFO L226 Difference]: Without dead ends: 91 [2024-12-02 07:28:08,847 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:28:08,848 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 7 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:08,848 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 261 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:08,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-12-02 07:28:08,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-12-02 07:28:08,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 51 states have (on average 1.7843137254901962) internal successors, (91), 87 states have internal predecessors, (91), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2024-12-02 07:28:08,853 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 24 [2024-12-02 07:28:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:08,853 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2024-12-02 07:28:08,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2024-12-02 07:28:08,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-12-02 07:28:08,854 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:08,854 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:08,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-12-02 07:28:08,854 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:08,855 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:08,855 INFO L85 PathProgramCache]: Analyzing trace with hash -193522428, now seen corresponding path program 1 times [2024-12-02 07:28:08,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:08,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688373600] [2024-12-02 07:28:08,855 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:08,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:08,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:09,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:09,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688373600] [2024-12-02 07:28:09,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688373600] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:09,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:09,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-12-02 07:28:09,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135822762] [2024-12-02 07:28:09,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:09,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-12-02 07:28:09,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:09,084 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-12-02 07:28:09,084 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:28:09,084 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:09,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:09,218 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2024-12-02 07:28:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:28:09,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2024-12-02 07:28:09,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:09,220 INFO L225 Difference]: With dead ends: 90 [2024-12-02 07:28:09,220 INFO L226 Difference]: Without dead ends: 90 [2024-12-02 07:28:09,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:28:09,220 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 6 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:09,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 285 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-12-02 07:28:09,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2024-12-02 07:28:09,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 86 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:09,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2024-12-02 07:28:09,225 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 24 [2024-12-02 07:28:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:09,226 INFO L471 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2024-12-02 07:28:09,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:09,226 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2024-12-02 07:28:09,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 07:28:09,226 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:09,226 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:09,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-12-02 07:28:09,227 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:09,227 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:09,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1291460828, now seen corresponding path program 1 times [2024-12-02 07:28:09,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:09,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769520035] [2024-12-02 07:28:09,227 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:09,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:09,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:09,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:09,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769520035] [2024-12-02 07:28:09,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769520035] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:09,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992745874] [2024-12-02 07:28:09,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:09,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:09,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:09,551 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:09,552 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-12-02 07:28:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:09,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-12-02 07:28:09,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:09,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:09,763 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-12-02 07:28:09,847 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-12-02 07:28:09,848 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 16 [2024-12-02 07:28:09,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-12-02 07:28:09,862 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:09,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992745874] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:09,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:09,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2024-12-02 07:28:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22540665] [2024-12-02 07:28:09,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:09,941 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:28:09,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:09,942 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:28:09,942 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-12-02 07:28:09,942 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 07:28:10,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:10,253 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2024-12-02 07:28:10,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:28:10,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-12-02 07:28:10,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:10,255 INFO L225 Difference]: With dead ends: 95 [2024-12-02 07:28:10,255 INFO L226 Difference]: Without dead ends: 95 [2024-12-02 07:28:10,255 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-12-02 07:28:10,256 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 95 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:10,256 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 323 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 309 Invalid, 0 Unknown, 95 Unchecked, 0.2s Time] [2024-12-02 07:28:10,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-12-02 07:28:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-12-02 07:28:10,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 90 states have internal predecessors, (96), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 07:28:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2024-12-02 07:28:10,262 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 26 [2024-12-02 07:28:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:10,263 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2024-12-02 07:28:10,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 9 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 07:28:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2024-12-02 07:28:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-12-02 07:28:10,264 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:10,264 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:10,274 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-12-02 07:28:10,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-12-02 07:28:10,465 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:10,465 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1291460827, now seen corresponding path program 1 times [2024-12-02 07:28:10,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:10,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943144985] [2024-12-02 07:28:10,465 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:10,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:10,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943144985] [2024-12-02 07:28:10,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943144985] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:10,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139641249] [2024-12-02 07:28:10,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:10,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:10,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:10,822 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:10,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-12-02 07:28:10,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:10,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-12-02 07:28:10,933 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:10,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:10,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:28:11,090 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:28:11,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 07:28:11,109 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:11,110 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:11,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:11,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:11,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139641249] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:11,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:11,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2024-12-02 07:28:11,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449123593] [2024-12-02 07:28:11,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:11,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:28:11,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:11,280 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:28:11,280 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:28:11,280 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 07:28:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:11,608 INFO L93 Difference]: Finished difference Result 95 states and 101 transitions. [2024-12-02 07:28:11,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-12-02 07:28:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2024-12-02 07:28:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:11,610 INFO L225 Difference]: With dead ends: 95 [2024-12-02 07:28:11,610 INFO L226 Difference]: Without dead ends: 95 [2024-12-02 07:28:11,610 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2024-12-02 07:28:11,611 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 0 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:11,611 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 403 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:28:11,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-12-02 07:28:11,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-12-02 07:28:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 55 states have (on average 1.7272727272727273) internal successors, (95), 90 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 07:28:11,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2024-12-02 07:28:11,616 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 26 [2024-12-02 07:28:11,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:11,616 INFO L471 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2024-12-02 07:28:11,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 07:28:11,617 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2024-12-02 07:28:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-12-02 07:28:11,617 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:11,617 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] [2024-12-02 07:28:11,624 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-12-02 07:28:11,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-12-02 07:28:11,818 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:11,818 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:11,818 INFO L85 PathProgramCache]: Analyzing trace with hash 151847001, now seen corresponding path program 1 times [2024-12-02 07:28:11,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:11,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495243008] [2024-12-02 07:28:11,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:11,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:11,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:11,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495243008] [2024-12-02 07:28:11,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495243008] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:11,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706675435] [2024-12-02 07:28:11,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:11,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:11,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:11,906 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:11,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-12-02 07:28:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:12,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-12-02 07:28:12,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:12,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:12,085 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-12-02 07:28:12,109 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-12-02 07:28:12,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-12-02 07:28:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 7 not checked. [2024-12-02 07:28:12,132 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:12,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:12,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706675435] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:12,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:12,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 13 [2024-12-02 07:28:12,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411656339] [2024-12-02 07:28:12,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:12,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-12-02 07:28:12,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:12,285 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-12-02 07:28:12,286 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=111, Unknown=1, NotChecked=20, Total=156 [2024-12-02 07:28:12,286 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-12-02 07:28:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:12,536 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2024-12-02 07:28:12,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:28:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 28 [2024-12-02 07:28:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:12,537 INFO L225 Difference]: With dead ends: 94 [2024-12-02 07:28:12,537 INFO L226 Difference]: Without dead ends: 94 [2024-12-02 07:28:12,537 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2024-12-02 07:28:12,538 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 10 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 308 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:12,538 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 578 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 308 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2024-12-02 07:28:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-12-02 07:28:12,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-12-02 07:28:12,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 55 states have (on average 1.690909090909091) internal successors, (93), 89 states have internal predecessors, (93), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-12-02 07:28:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 99 transitions. [2024-12-02 07:28:12,542 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 99 transitions. Word has length 28 [2024-12-02 07:28:12,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:12,542 INFO L471 AbstractCegarLoop]: Abstraction has 94 states and 99 transitions. [2024-12-02 07:28:12,543 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 10 states have internal predecessors, (53), 3 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-12-02 07:28:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 99 transitions. [2024-12-02 07:28:12,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-12-02 07:28:12,543 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:12,543 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] [2024-12-02 07:28:12,552 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-12-02 07:28:12,744 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-12-02 07:28:12,744 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:12,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash 407508143, now seen corresponding path program 1 times [2024-12-02 07:28:12,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:12,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904493365] [2024-12-02 07:28:12,744 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:12,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:12,933 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:12,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904493365] [2024-12-02 07:28:12,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904493365] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:12,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815019640] [2024-12-02 07:28:12,934 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:12,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:12,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:12,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:12,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-12-02 07:28:13,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:13,054 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-12-02 07:28:13,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:13,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:13,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:28:13,204 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-12-02 07:28:13,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:13,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:28:13,260 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:13,261 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2024-12-02 07:28:13,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:13,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815019640] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:13,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:13,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-12-02 07:28:13,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621411105] [2024-12-02 07:28:13,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:13,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 07:28:13,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:13,410 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 07:28:13,410 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=201, Unknown=1, NotChecked=28, Total=272 [2024-12-02 07:28:13,411 INFO L87 Difference]: Start difference. First operand 94 states and 99 transitions. Second operand has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-12-02 07:28:13,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:13,759 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2024-12-02 07:28:13,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-12-02 07:28:13,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2024-12-02 07:28:13,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:13,761 INFO L225 Difference]: With dead ends: 111 [2024-12-02 07:28:13,761 INFO L226 Difference]: Without dead ends: 111 [2024-12-02 07:28:13,762 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2024-12-02 07:28:13,762 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 20 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:13,763 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 520 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 391 Invalid, 0 Unknown, 114 Unchecked, 0.3s Time] [2024-12-02 07:28:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-12-02 07:28:13,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 104. [2024-12-02 07:28:13,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 64 states have (on average 1.671875) internal successors, (107), 98 states have internal predecessors, (107), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:13,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 115 transitions. [2024-12-02 07:28:13,767 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 115 transitions. Word has length 29 [2024-12-02 07:28:13,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:13,768 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 115 transitions. [2024-12-02 07:28:13,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 12 states have internal predecessors, (48), 3 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-12-02 07:28:13,768 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 115 transitions. [2024-12-02 07:28:13,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-12-02 07:28:13,768 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:13,768 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] [2024-12-02 07:28:13,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-12-02 07:28:13,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:13,969 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:13,969 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:13,969 INFO L85 PathProgramCache]: Analyzing trace with hash -252149481, now seen corresponding path program 1 times [2024-12-02 07:28:13,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:13,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253757437] [2024-12-02 07:28:13,970 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:13,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:28:14,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:14,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253757437] [2024-12-02 07:28:14,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253757437] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:14,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:14,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:28:14,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800955732] [2024-12-02 07:28:14,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:14,077 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:28:14,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:14,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:28:14,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:28:14,077 INFO L87 Difference]: Start difference. First operand 104 states and 115 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:14,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:14,225 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2024-12-02 07:28:14,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:28:14,226 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-12-02 07:28:14,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:14,226 INFO L225 Difference]: With dead ends: 103 [2024-12-02 07:28:14,226 INFO L226 Difference]: Without dead ends: 103 [2024-12-02 07:28:14,227 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:28:14,227 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 7 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:14,227 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 291 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:14,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-12-02 07:28:14,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-12-02 07:28:14,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.65625) internal successors, (106), 97 states have internal predecessors, (106), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:14,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2024-12-02 07:28:14,232 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 30 [2024-12-02 07:28:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:14,232 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2024-12-02 07:28:14,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2024-12-02 07:28:14,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-12-02 07:28:14,233 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:14,233 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] [2024-12-02 07:28:14,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-12-02 07:28:14,233 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:14,234 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash -252149480, now seen corresponding path program 1 times [2024-12-02 07:28:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033479839] [2024-12-02 07:28:14,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:14,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:14,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:14,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:14,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033479839] [2024-12-02 07:28:14,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033479839] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:14,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:14,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-12-02 07:28:14,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464054339] [2024-12-02 07:28:14,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:14,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:28:14,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:14,441 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:28:14,441 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:28:14,441 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:14,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:14,590 INFO L93 Difference]: Finished difference Result 102 states and 113 transitions. [2024-12-02 07:28:14,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-12-02 07:28:14,590 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2024-12-02 07:28:14,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:14,591 INFO L225 Difference]: With dead ends: 102 [2024-12-02 07:28:14,591 INFO L226 Difference]: Without dead ends: 102 [2024-12-02 07:28:14,591 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-12-02 07:28:14,592 INFO L435 NwaCegarLoop]: 79 mSDtfsCounter, 6 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:14,592 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 316 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:14,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-12-02 07:28:14,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-12-02 07:28:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 64 states have (on average 1.640625) internal successors, (105), 96 states have internal predecessors, (105), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:14,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2024-12-02 07:28:14,596 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 30 [2024-12-02 07:28:14,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:14,596 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2024-12-02 07:28:14,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:14,596 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2024-12-02 07:28:14,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-12-02 07:28:14,597 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:14,597 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:14,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-12-02 07:28:14,597 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:14,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:14,598 INFO L85 PathProgramCache]: Analyzing trace with hash -803739500, now seen corresponding path program 1 times [2024-12-02 07:28:14,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:14,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512159317] [2024-12-02 07:28:14,598 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:14,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:14,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512159317] [2024-12-02 07:28:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512159317] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:28:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499390155] [2024-12-02 07:28:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:14,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:28:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:14,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:28:14,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:28:14,672 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:14,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:14,687 INFO L93 Difference]: Finished difference Result 152 states and 164 transitions. [2024-12-02 07:28:14,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:28:14,687 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2024-12-02 07:28:14,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:14,688 INFO L225 Difference]: With dead ends: 152 [2024-12-02 07:28:14,688 INFO L226 Difference]: Without dead ends: 152 [2024-12-02 07:28:14,689 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:28:14,689 INFO L435 NwaCegarLoop]: 87 mSDtfsCounter, 106 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:14,689 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 189 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:28:14,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-12-02 07:28:14,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 103. [2024-12-02 07:28:14,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 97 states have internal predecessors, (106), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:14,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2024-12-02 07:28:14,693 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 34 [2024-12-02 07:28:14,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:14,693 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2024-12-02 07:28:14,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 4 states have internal predecessors, (23), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:14,693 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2024-12-02 07:28:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 07:28:14,694 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:14,694 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:14,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-12-02 07:28:14,694 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:14,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:14,695 INFO L85 PathProgramCache]: Analyzing trace with hash 853875608, now seen corresponding path program 1 times [2024-12-02 07:28:14,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:14,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850076579] [2024-12-02 07:28:14,695 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:14,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-12-02 07:28:14,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:14,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850076579] [2024-12-02 07:28:14,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850076579] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:14,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650081922] [2024-12-02 07:28:14,992 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:14,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:14,993 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:14,994 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:14,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-12-02 07:28:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:15,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-12-02 07:28:15,137 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:15,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:15,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 07:28:15,200 WARN L851 $PredicateComparison]: unable to prove that (and (or (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= |c_ULTIMATE.start_dll_circular_create_#t~ret4#1.base| .cse0) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |c_#valid| .cse0))))))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|)) is different from false [2024-12-02 07:28:15,202 WARN L873 $PredicateComparison]: unable to prove that (and (or (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= |c_ULTIMATE.start_dll_circular_create_#t~ret4#1.base| .cse0) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |c_#valid| .cse0))))))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|)) is different from true [2024-12-02 07:28:15,222 WARN L851 $PredicateComparison]: unable to prove that (and (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (or (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |c_#valid| .cse0)))))) (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) is different from false [2024-12-02 07:28:15,224 WARN L873 $PredicateComparison]: unable to prove that (and (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (or (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |c_#valid| .cse0)))))) (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) is different from true [2024-12-02 07:28:15,255 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 07:28:15,266 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-12-02 07:28:15,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:15,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:28:15,354 WARN L851 $PredicateComparison]: unable to prove that (or (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((|v_old(#valid)_AFTER_CALL_10| (Array Int Int))) (and (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0)))))) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|))) (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1)) is different from false [2024-12-02 07:28:15,357 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((|v_old(#valid)_AFTER_CALL_10| (Array Int Int))) (and (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0)))))) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|))) (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1)) is different from true [2024-12-02 07:28:15,555 WARN L851 $PredicateComparison]: unable to prove that (or (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse0) 1) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0)))))) (and (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)))) is different from false [2024-12-02 07:28:15,558 WARN L873 $PredicateComparison]: unable to prove that (or (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse0) 1) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0)))))) (and (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)))) is different from true [2024-12-02 07:28:15,674 WARN L851 $PredicateComparison]: unable to prove that (or (and (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1)) (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse0) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0))))))) is different from false [2024-12-02 07:28:15,677 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1)) (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse0) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0))))))) is different from true [2024-12-02 07:28:15,678 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 8 not checked. [2024-12-02 07:28:15,678 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650081922] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:15,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:15,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2024-12-02 07:28:15,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679917965] [2024-12-02 07:28:15,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:15,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-12-02 07:28:15,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:15,778 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-12-02 07:28:15,778 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=143, Unknown=11, NotChecked=174, Total=380 [2024-12-02 07:28:15,779 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 18 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:15,871 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and .cse0 (or .cse0 (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= |c_ULTIMATE.start_dll_circular_create_#t~ret4#1.base| .cse1) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |c_#valid| .cse1))))))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|))) is different from false [2024-12-02 07:28:15,875 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and .cse0 (or .cse0 (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= |c_ULTIMATE.start_dll_circular_create_#t~ret4#1.base| .cse1) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |c_#valid| .cse1))))))) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|))) is different from true [2024-12-02 07:28:15,878 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and (or .cse0 (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (or (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |c_#valid| .cse1)))))) .cse0))) is different from false [2024-12-02 07:28:15,880 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and (or .cse0 (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)) (<= (+ |c_#StackHeapBarrier| 1) |c_ULTIMATE.start_main_~#s~0#1.base|) (or (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |c_#valid|))) (and (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse1) (= |c_#valid| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |c_#valid| .cse1)))))) .cse0))) is different from true [2024-12-02 07:28:15,884 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and (or (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((|v_old(#valid)_AFTER_CALL_10| (Array Int Int))) (and (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0)))))) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|))) .cse1) (or .cse1 (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)))) is different from false [2024-12-02 07:28:15,887 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse1 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and (or (exists ((|node_create_~temp~0#1.base| Int)) (and (exists ((|v_old(#valid)_AFTER_CALL_10| (Array Int Int))) (and (exists ((|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse0 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse0) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse0 (select |v_old(#valid)_AFTER_CALL_10| .cse0)))))) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|))) .cse1) (or .cse1 (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_main_~#s~0#1.base|)))) is different from true [2024-12-02 07:28:15,895 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and .cse0 (or (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse1) 1) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |v_old(#valid)_AFTER_CALL_10| .cse1)))))) (and .cse0 (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)))))) is different from false [2024-12-02 07:28:15,898 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_main_~#s~0#1.base|) 1))) (and .cse0 (or (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse1) 1) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_main_~#s~0#1.base|) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_main_~#s~0#1.base|) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |v_old(#valid)_AFTER_CALL_10| .cse1)))))) (and .cse0 (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)))))) is different from true [2024-12-02 07:28:15,901 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1))) (and (or (and (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) .cse0) (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse1) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |v_old(#valid)_AFTER_CALL_10| .cse1))))))) .cse0)) is different from false [2024-12-02 07:28:15,904 WARN L873 $PredicateComparison]: unable to prove that (let ((.cse0 (= (select |c_#valid| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1))) (and (or (and (exists ((|ULTIMATE.start_dll_circular_create_~last~0#1.base| Int)) (= (select |c_#valid| |ULTIMATE.start_dll_circular_create_~last~0#1.base|) 1)) .cse0) (exists ((|node_create_~temp~0#1.base| Int) (|v_old(#valid)_AFTER_CALL_10| (Array Int Int)) (|v_#valid_BEFORE_CALL_11| (Array Int Int))) (let ((.cse1 (@diff |v_#valid_BEFORE_CALL_11| |v_old(#valid)_AFTER_CALL_10|))) (and (= (select |c_#valid| .cse1) 1) (= |c_#valid| (store |v_old(#valid)_AFTER_CALL_10| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (<= (+ |node_create_~temp~0#1.base| 2) |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) (= (select |v_#valid_BEFORE_CALL_11| |c_ULTIMATE.start_dll_circular_remove_last_~head#1.base|) 1) (= |v_old(#valid)_AFTER_CALL_10| (store |v_#valid_BEFORE_CALL_11| .cse1 (select |v_old(#valid)_AFTER_CALL_10| .cse1))))))) .cse0)) is different from true [2024-12-02 07:28:16,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:16,191 INFO L93 Difference]: Finished difference Result 141 states and 155 transitions. [2024-12-02 07:28:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:28:16,192 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2024-12-02 07:28:16,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:16,193 INFO L225 Difference]: With dead ends: 141 [2024-12-02 07:28:16,193 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 07:28:16,193 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=216, Unknown=21, NotChecked=440, Total=756 [2024-12-02 07:28:16,194 INFO L435 NwaCegarLoop]: 76 mSDtfsCounter, 60 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1021 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:16,194 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 437 Invalid, 1537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 506 Invalid, 0 Unknown, 1021 Unchecked, 0.3s Time] [2024-12-02 07:28:16,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 07:28:16,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2024-12-02 07:28:16,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 77 states have (on average 1.5714285714285714) internal successors, (121), 107 states have internal predecessors, (121), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 129 transitions. [2024-12-02 07:28:16,198 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 129 transitions. Word has length 35 [2024-12-02 07:28:16,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:16,198 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 129 transitions. [2024-12-02 07:28:16,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:16,198 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 129 transitions. [2024-12-02 07:28:16,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-12-02 07:28:16,199 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:16,199 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:16,205 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-12-02 07:28:16,400 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-12-02 07:28:16,401 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:16,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 853875609, now seen corresponding path program 1 times [2024-12-02 07:28:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:16,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281562209] [2024-12-02 07:28:16,401 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:16,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:16,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:16,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281562209] [2024-12-02 07:28:16,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281562209] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:16,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825929974] [2024-12-02 07:28:16,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:16,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:16,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:16,709 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:16,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-12-02 07:28:16,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:16,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-12-02 07:28:16,863 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:16,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:28:16,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 07:28:16,902 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-12-02 07:28:16,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:16,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:28:16,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 07:28:16,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:16,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:28:17,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:28:17,065 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825929974] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:17,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:17,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2024-12-02 07:28:17,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146385365] [2024-12-02 07:28:17,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:17,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 07:28:17,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:17,220 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 07:28:17,220 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=246, Unknown=1, NotChecked=32, Total=342 [2024-12-02 07:28:17,220 INFO L87 Difference]: Start difference. First operand 113 states and 129 transitions. Second operand has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-12-02 07:28:17,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:17,524 INFO L93 Difference]: Finished difference Result 106 states and 119 transitions. [2024-12-02 07:28:17,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-12-02 07:28:17,525 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2024-12-02 07:28:17,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:17,526 INFO L225 Difference]: With dead ends: 106 [2024-12-02 07:28:17,526 INFO L226 Difference]: Without dead ends: 106 [2024-12-02 07:28:17,526 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=336, Unknown=1, NotChecked=38, Total=462 [2024-12-02 07:28:17,527 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 118 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:17,527 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 288 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 352 Invalid, 0 Unknown, 74 Unchecked, 0.2s Time] [2024-12-02 07:28:17,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-12-02 07:28:17,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-12-02 07:28:17,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.4415584415584415) internal successors, (111), 100 states have internal predecessors, (111), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-12-02 07:28:17,530 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 35 [2024-12-02 07:28:17,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:17,530 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-12-02 07:28:17,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.857142857142857) internal successors, (54), 14 states have internal predecessors, (54), 3 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-12-02 07:28:17,531 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-12-02 07:28:17,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 07:28:17,531 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:17,531 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:17,537 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-12-02 07:28:17,732 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-12-02 07:28:17,732 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:17,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:17,732 INFO L85 PathProgramCache]: Analyzing trace with hash 700340096, now seen corresponding path program 1 times [2024-12-02 07:28:17,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:17,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78855581] [2024-12-02 07:28:17,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:17,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:17,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-12-02 07:28:17,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:17,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78855581] [2024-12-02 07:28:17,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78855581] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:17,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:17,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 07:28:17,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147117958] [2024-12-02 07:28:17,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:17,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:28:17,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:17,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:28:17,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:28:17,926 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:18,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:18,179 INFO L93 Difference]: Finished difference Result 128 states and 141 transitions. [2024-12-02 07:28:18,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:28:18,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-12-02 07:28:18,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:18,180 INFO L225 Difference]: With dead ends: 128 [2024-12-02 07:28:18,180 INFO L226 Difference]: Without dead ends: 128 [2024-12-02 07:28:18,181 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:28:18,181 INFO L435 NwaCegarLoop]: 57 mSDtfsCounter, 52 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:18,181 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 360 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:28:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-12-02 07:28:18,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 107. [2024-12-02 07:28:18,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 78 states have (on average 1.435897435897436) internal successors, (112), 101 states have internal predecessors, (112), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:18,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 120 transitions. [2024-12-02 07:28:18,185 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 120 transitions. Word has length 36 [2024-12-02 07:28:18,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:18,186 INFO L471 AbstractCegarLoop]: Abstraction has 107 states and 120 transitions. [2024-12-02 07:28:18,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:18,186 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 120 transitions. [2024-12-02 07:28:18,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-12-02 07:28:18,186 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:18,186 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:18,186 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-12-02 07:28:18,187 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:18,187 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:18,187 INFO L85 PathProgramCache]: Analyzing trace with hash 700340097, now seen corresponding path program 1 times [2024-12-02 07:28:18,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:18,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321584363] [2024-12-02 07:28:18,187 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:18,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:18,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:18,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321584363] [2024-12-02 07:28:18,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321584363] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:18,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:18,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 07:28:18,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626161839] [2024-12-02 07:28:18,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:18,545 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:28:18,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:18,545 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:28:18,545 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:28:18,546 INFO L87 Difference]: Start difference. First operand 107 states and 120 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:18,833 INFO L93 Difference]: Finished difference Result 148 states and 162 transitions. [2024-12-02 07:28:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:28:18,834 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2024-12-02 07:28:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:18,835 INFO L225 Difference]: With dead ends: 148 [2024-12-02 07:28:18,835 INFO L226 Difference]: Without dead ends: 148 [2024-12-02 07:28:18,835 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:28:18,835 INFO L435 NwaCegarLoop]: 54 mSDtfsCounter, 75 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:18,835 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 440 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:28:18,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-12-02 07:28:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 126. [2024-12-02 07:28:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 97 states have (on average 1.4742268041237114) internal successors, (143), 120 states have internal predecessors, (143), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2024-12-02 07:28:18,840 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 36 [2024-12-02 07:28:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:18,840 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2024-12-02 07:28:18,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:18,840 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2024-12-02 07:28:18,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-12-02 07:28:18,841 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:18,841 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:18,841 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-12-02 07:28:18,841 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:18,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1283032351, now seen corresponding path program 1 times [2024-12-02 07:28:18,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:18,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496979486] [2024-12-02 07:28:18,842 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:18,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:18,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:18,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:18,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496979486] [2024-12-02 07:28:18,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496979486] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:18,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:18,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-12-02 07:28:18,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566107965] [2024-12-02 07:28:18,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:18,882 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-12-02 07:28:18,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:18,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-12-02 07:28:18,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:18,883 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:18,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:18,926 INFO L93 Difference]: Finished difference Result 125 states and 150 transitions. [2024-12-02 07:28:18,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-12-02 07:28:18,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 38 [2024-12-02 07:28:18,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:18,927 INFO L225 Difference]: With dead ends: 125 [2024-12-02 07:28:18,927 INFO L226 Difference]: Without dead ends: 125 [2024-12-02 07:28:18,927 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-12-02 07:28:18,927 INFO L435 NwaCegarLoop]: 67 mSDtfsCounter, 24 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:18,928 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 93 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:28:18,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-12-02 07:28:18,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 115. [2024-12-02 07:28:18,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 87 states have (on average 1.5172413793103448) internal successors, (132), 109 states have internal predecessors, (132), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2024-12-02 07:28:18,931 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 38 [2024-12-02 07:28:18,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:18,932 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2024-12-02 07:28:18,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 13.5) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:18,932 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2024-12-02 07:28:18,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-12-02 07:28:18,932 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:18,932 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:18,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-12-02 07:28:18,933 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:18,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:18,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1662935685, now seen corresponding path program 1 times [2024-12-02 07:28:18,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:18,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247047843] [2024-12-02 07:28:18,933 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:18,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:18,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-12-02 07:28:19,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:19,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247047843] [2024-12-02 07:28:19,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247047843] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:19,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637214415] [2024-12-02 07:28:19,011 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:19,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:19,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:19,013 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:19,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-12-02 07:28:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:19,178 INFO L256 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-12-02 07:28:19,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:19,199 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:28:19,199 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:28:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637214415] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:19,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:28:19,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2024-12-02 07:28:19,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616001383] [2024-12-02 07:28:19,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:19,199 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:28:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:19,200 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:28:19,200 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:28:19,200 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 07:28:19,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:19,211 INFO L93 Difference]: Finished difference Result 97 states and 113 transitions. [2024-12-02 07:28:19,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-12-02 07:28:19,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-12-02 07:28:19,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:19,212 INFO L225 Difference]: With dead ends: 97 [2024-12-02 07:28:19,212 INFO L226 Difference]: Without dead ends: 97 [2024-12-02 07:28:19,213 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:28:19,213 INFO L435 NwaCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:19,213 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 142 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:28:19,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-12-02 07:28:19,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-12-02 07:28:19,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 74 states have (on average 1.472972972972973) internal successors, (109), 93 states have internal predecessors, (109), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:19,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-12-02 07:28:19,216 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 41 [2024-12-02 07:28:19,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:19,216 INFO L471 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-12-02 07:28:19,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-12-02 07:28:19,217 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-12-02 07:28:19,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 07:28:19,217 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:19,217 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:19,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-12-02 07:28:19,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-12-02 07:28:19,418 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:19,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash -338473853, now seen corresponding path program 1 times [2024-12-02 07:28:19,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:19,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019051759] [2024-12-02 07:28:19,418 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:19,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:20,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:28:20,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019051759] [2024-12-02 07:28:20,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019051759] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:20,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263251356] [2024-12-02 07:28:20,045 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:20,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:20,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:20,046 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:20,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-12-02 07:28:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:20,307 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-12-02 07:28:20,310 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:20,329 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:20,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:28:20,610 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:28:20,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-12-02 07:28:20,622 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:20,622 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:20,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 07:28:20,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:28:20,990 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 48 treesize of output 28 [2024-12-02 07:28:21,038 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-12-02 07:28:21,042 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-12-02 07:28:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:21,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:21,295 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 64 treesize of output 48 [2024-12-02 07:28:21,297 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 52 treesize of output 36 [2024-12-02 07:28:21,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263251356] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:21,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:21,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2024-12-02 07:28:21,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033513924] [2024-12-02 07:28:21,530 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:21,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-12-02 07:28:21,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:21,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-12-02 07:28:21,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2024-12-02 07:28:21,531 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 35 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 30 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:22,387 INFO L93 Difference]: Finished difference Result 122 states and 139 transitions. [2024-12-02 07:28:22,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-12-02 07:28:22,387 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 30 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 40 [2024-12-02 07:28:22,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:22,388 INFO L225 Difference]: With dead ends: 122 [2024-12-02 07:28:22,388 INFO L226 Difference]: Without dead ends: 122 [2024-12-02 07:28:22,388 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=225, Invalid=2745, Unknown=0, NotChecked=0, Total=2970 [2024-12-02 07:28:22,388 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 162 mSDsluCounter, 693 mSDsCounter, 0 mSdLazyCounter, 968 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 734 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 968 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:22,389 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 734 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 968 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:28:22,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-12-02 07:28:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2024-12-02 07:28:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 80 states have (on average 1.4625) internal successors, (117), 99 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2024-12-02 07:28:22,391 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 40 [2024-12-02 07:28:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:22,391 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2024-12-02 07:28:22,391 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.9393939393939394) internal successors, (64), 30 states have internal predecessors, (64), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2024-12-02 07:28:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-12-02 07:28:22,392 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:22,392 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:22,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-12-02 07:28:22,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:22,592 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr21REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:22,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:22,593 INFO L85 PathProgramCache]: Analyzing trace with hash -338473854, now seen corresponding path program 1 times [2024-12-02 07:28:22,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:22,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669539163] [2024-12-02 07:28:22,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:22,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:22,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:22,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:22,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669539163] [2024-12-02 07:28:22,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669539163] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:22,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:22,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2024-12-02 07:28:22,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19312501] [2024-12-02 07:28:22,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:22,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-12-02 07:28:22,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:22,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-12-02 07:28:22,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:28:22,875 INFO L87 Difference]: Start difference. First operand 103 states and 121 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:23,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:23,163 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2024-12-02 07:28:23,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-12-02 07:28:23,164 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2024-12-02 07:28:23,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:23,164 INFO L225 Difference]: With dead ends: 112 [2024-12-02 07:28:23,164 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 07:28:23,165 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2024-12-02 07:28:23,165 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 43 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:23,165 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 503 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:28:23,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 07:28:23,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 102. [2024-12-02 07:28:23,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.425) internal successors, (114), 98 states have internal predecessors, (114), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 118 transitions. [2024-12-02 07:28:23,169 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 118 transitions. Word has length 40 [2024-12-02 07:28:23,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:23,169 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 118 transitions. [2024-12-02 07:28:23,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 118 transitions. [2024-12-02 07:28:23,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-12-02 07:28:23,170 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:23,170 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:23,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-12-02 07:28:23,170 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:23,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1902768734, now seen corresponding path program 1 times [2024-12-02 07:28:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:23,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296618469] [2024-12-02 07:28:23,171 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:23,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:23,316 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:23,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:23,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296618469] [2024-12-02 07:28:23,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296618469] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:23,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:23,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 07:28:23,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540190908] [2024-12-02 07:28:23,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:23,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:28:23,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:23,317 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:28:23,317 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:28:23,317 INFO L87 Difference]: Start difference. First operand 102 states and 118 transitions. Second operand has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:23,457 INFO L93 Difference]: Finished difference Result 101 states and 117 transitions. [2024-12-02 07:28:23,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-12-02 07:28:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 41 [2024-12-02 07:28:23,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:23,458 INFO L225 Difference]: With dead ends: 101 [2024-12-02 07:28:23,459 INFO L226 Difference]: Without dead ends: 101 [2024-12-02 07:28:23,459 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:28:23,459 INFO L435 NwaCegarLoop]: 48 mSDtfsCounter, 62 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:23,460 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 411 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:23,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-12-02 07:28:23,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2024-12-02 07:28:23,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 80 states have (on average 1.4125) internal successors, (113), 97 states have internal predecessors, (113), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:23,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2024-12-02 07:28:23,463 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 41 [2024-12-02 07:28:23,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:23,463 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2024-12-02 07:28:23,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:23,463 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2024-12-02 07:28:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-12-02 07:28:23,463 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:23,463 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:23,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-12-02 07:28:23,464 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:23,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:23,464 INFO L85 PathProgramCache]: Analyzing trace with hash 1143711490, now seen corresponding path program 1 times [2024-12-02 07:28:23,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:23,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228261593] [2024-12-02 07:28:23,464 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:23,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:23,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228261593] [2024-12-02 07:28:23,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228261593] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:23,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:23,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-12-02 07:28:23,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315871094] [2024-12-02 07:28:23,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:23,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-12-02 07:28:23,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:23,620 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-12-02 07:28:23,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:28:23,620 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:23,812 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2024-12-02 07:28:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:28:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 42 [2024-12-02 07:28:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:23,813 INFO L225 Difference]: With dead ends: 120 [2024-12-02 07:28:23,813 INFO L226 Difference]: Without dead ends: 120 [2024-12-02 07:28:23,813 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-12-02 07:28:23,814 INFO L435 NwaCegarLoop]: 53 mSDtfsCounter, 59 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:23,814 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 454 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:28:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-12-02 07:28:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2024-12-02 07:28:23,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 83 states have (on average 1.3975903614457832) internal successors, (116), 100 states have internal predecessors, (116), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:23,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2024-12-02 07:28:23,816 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 42 [2024-12-02 07:28:23,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:23,816 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2024-12-02 07:28:23,817 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:23,817 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2024-12-02 07:28:23,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 07:28:23,817 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:23,817 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:23,817 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-12-02 07:28:23,817 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:23,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1108677201, now seen corresponding path program 1 times [2024-12-02 07:28:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:23,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364868618] [2024-12-02 07:28:23,818 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:23,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:24,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364868618] [2024-12-02 07:28:24,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364868618] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:24,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316186056] [2024-12-02 07:28:24,345 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:24,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:24,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:24,347 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:24,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-12-02 07:28:24,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:24,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-12-02 07:28:24,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:24,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:28:24,892 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 21 treesize of output 13 [2024-12-02 07:28:24,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-12-02 07:28:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:25,001 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:25,124 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 26 treesize of output 18 [2024-12-02 07:28:25,126 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 22 treesize of output 14 [2024-12-02 07:28:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-12-02 07:28:25,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316186056] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:25,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:25,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 12] total 35 [2024-12-02 07:28:25,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142751340] [2024-12-02 07:28:25,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:25,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-12-02 07:28:25,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:25,239 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-12-02 07:28:25,239 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1152, Unknown=0, NotChecked=0, Total=1260 [2024-12-02 07:28:25,240 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 36 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-12-02 07:28:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:25,695 INFO L93 Difference]: Finished difference Result 118 states and 134 transitions. [2024-12-02 07:28:25,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-12-02 07:28:25,696 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 43 [2024-12-02 07:28:25,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:25,696 INFO L225 Difference]: With dead ends: 118 [2024-12-02 07:28:25,696 INFO L226 Difference]: Without dead ends: 118 [2024-12-02 07:28:25,697 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 56 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=1639, Unknown=0, NotChecked=0, Total=1806 [2024-12-02 07:28:25,697 INFO L435 NwaCegarLoop]: 41 mSDtfsCounter, 155 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 661 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:25,697 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 661 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:28:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-12-02 07:28:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2024-12-02 07:28:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.3928571428571428) internal successors, (117), 101 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2024-12-02 07:28:25,699 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 43 [2024-12-02 07:28:25,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:25,699 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2024-12-02 07:28:25,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.323529411764706) internal successors, (79), 32 states have internal predecessors, (79), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2024-12-02 07:28:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2024-12-02 07:28:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-12-02 07:28:25,700 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:25,700 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:25,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-12-02 07:28:25,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:25,900 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:25,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1095317924, now seen corresponding path program 1 times [2024-12-02 07:28:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:25,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146593413] [2024-12-02 07:28:25,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:25,951 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:25,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:25,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146593413] [2024-12-02 07:28:25,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146593413] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:25,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:25,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-12-02 07:28:25,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568434255] [2024-12-02 07:28:25,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:25,952 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-12-02 07:28:25,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:25,952 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-12-02 07:28:25,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:28:25,953 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:26,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:26,021 INFO L93 Difference]: Finished difference Result 104 states and 120 transitions. [2024-12-02 07:28:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:28:26,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2024-12-02 07:28:26,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:26,022 INFO L225 Difference]: With dead ends: 104 [2024-12-02 07:28:26,022 INFO L226 Difference]: Without dead ends: 104 [2024-12-02 07:28:26,022 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-12-02 07:28:26,022 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:26,022 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 170 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:26,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-12-02 07:28:26,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2024-12-02 07:28:26,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 84 states have (on average 1.380952380952381) internal successors, (116), 100 states have internal predecessors, (116), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:26,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2024-12-02 07:28:26,025 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 43 [2024-12-02 07:28:26,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:26,025 INFO L471 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2024-12-02 07:28:26,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:26,025 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2024-12-02 07:28:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-12-02 07:28:26,025 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:26,025 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:26,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-12-02 07:28:26,025 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:26,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:26,026 INFO L85 PathProgramCache]: Analyzing trace with hash -404882619, now seen corresponding path program 1 times [2024-12-02 07:28:26,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:26,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825937401] [2024-12-02 07:28:26,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:26,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:26,233 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:26,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:26,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825937401] [2024-12-02 07:28:26,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825937401] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:26,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947729867] [2024-12-02 07:28:26,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:26,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:26,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:26,235 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:26,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-12-02 07:28:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:26,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-12-02 07:28:26,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:26,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:26,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:28:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:26,562 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-12-02 07:28:26,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947729867] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:26,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-12-02 07:28:26,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 16 [2024-12-02 07:28:26,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805854019] [2024-12-02 07:28:26,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:26,563 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-12-02 07:28:26,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:26,563 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-12-02 07:28:26,563 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2024-12-02 07:28:26,563 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:26,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:26,678 INFO L93 Difference]: Finished difference Result 103 states and 119 transitions. [2024-12-02 07:28:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:28:26,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 44 [2024-12-02 07:28:26,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:26,679 INFO L225 Difference]: With dead ends: 103 [2024-12-02 07:28:26,679 INFO L226 Difference]: Without dead ends: 103 [2024-12-02 07:28:26,680 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2024-12-02 07:28:26,680 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 77 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:26,680 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 137 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:26,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-12-02 07:28:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-12-02 07:28:26,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 84 states have (on average 1.369047619047619) internal successors, (115), 99 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:26,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 119 transitions. [2024-12-02 07:28:26,683 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 119 transitions. Word has length 44 [2024-12-02 07:28:26,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:26,683 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 119 transitions. [2024-12-02 07:28:26,683 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.5) internal successors, (33), 7 states have internal predecessors, (33), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:26,683 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 119 transitions. [2024-12-02 07:28:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-12-02 07:28:26,683 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:26,684 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:26,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-12-02 07:28:26,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-12-02 07:28:26,884 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:26,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:26,884 INFO L85 PathProgramCache]: Analyzing trace with hash 286904500, now seen corresponding path program 1 times [2024-12-02 07:28:26,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:26,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553258008] [2024-12-02 07:28:26,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:26,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:26,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553258008] [2024-12-02 07:28:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553258008] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:26,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-12-02 07:28:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273489678] [2024-12-02 07:28:26,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:26,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-12-02 07:28:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:26,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-12-02 07:28:26,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-12-02 07:28:26,984 INFO L87 Difference]: Start difference. First operand 103 states and 119 transitions. Second operand has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:27,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:27,076 INFO L93 Difference]: Finished difference Result 102 states and 117 transitions. [2024-12-02 07:28:27,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-12-02 07:28:27,076 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 45 [2024-12-02 07:28:27,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:27,077 INFO L225 Difference]: With dead ends: 102 [2024-12-02 07:28:27,077 INFO L226 Difference]: Without dead ends: 102 [2024-12-02 07:28:27,077 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-12-02 07:28:27,077 INFO L435 NwaCegarLoop]: 47 mSDtfsCounter, 112 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:27,077 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 129 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-12-02 07:28:27,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-12-02 07:28:27,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-12-02 07:28:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 84 states have (on average 1.3452380952380953) internal successors, (113), 98 states have internal predecessors, (113), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:27,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 117 transitions. [2024-12-02 07:28:27,080 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 117 transitions. Word has length 45 [2024-12-02 07:28:27,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:27,080 INFO L471 AbstractCegarLoop]: Abstraction has 102 states and 117 transitions. [2024-12-02 07:28:27,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.857142857142857) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:27,080 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 117 transitions. [2024-12-02 07:28:27,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 07:28:27,081 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:27,081 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:27,081 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-12-02 07:28:27,081 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:27,081 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:27,081 INFO L85 PathProgramCache]: Analyzing trace with hash 304104969, now seen corresponding path program 1 times [2024-12-02 07:28:27,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:27,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383210890] [2024-12-02 07:28:27,081 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:27,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:27,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:27,400 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:27,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:27,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383210890] [2024-12-02 07:28:27,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383210890] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:27,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:27,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2024-12-02 07:28:27,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940917113] [2024-12-02 07:28:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:27,401 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-12-02 07:28:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:27,401 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-12-02 07:28:27,401 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2024-12-02 07:28:27,401 INFO L87 Difference]: Start difference. First operand 102 states and 117 transitions. Second operand has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:27,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:27,734 INFO L93 Difference]: Finished difference Result 112 states and 127 transitions. [2024-12-02 07:28:27,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-12-02 07:28:27,734 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-12-02 07:28:27,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:27,735 INFO L225 Difference]: With dead ends: 112 [2024-12-02 07:28:27,735 INFO L226 Difference]: Without dead ends: 112 [2024-12-02 07:28:27,735 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-12-02 07:28:27,735 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 41 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:27,735 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 342 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-12-02 07:28:27,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-12-02 07:28:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2024-12-02 07:28:27,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 101 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:27,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2024-12-02 07:28:27,737 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 46 [2024-12-02 07:28:27,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:27,737 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2024-12-02 07:28:27,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:27,737 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2024-12-02 07:28:27,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-12-02 07:28:27,738 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:27,738 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:27,738 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-12-02 07:28:27,738 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:27,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:27,738 INFO L85 PathProgramCache]: Analyzing trace with hash 304104970, now seen corresponding path program 1 times [2024-12-02 07:28:27,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:27,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955560980] [2024-12-02 07:28:27,739 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:27,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:27,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:27,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955560980] [2024-12-02 07:28:27,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955560980] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:27,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:27,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-12-02 07:28:27,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031019098] [2024-12-02 07:28:27,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:27,991 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-12-02 07:28:27,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:27,991 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-12-02 07:28:27,991 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-12-02 07:28:27,991 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:28,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:28,215 INFO L93 Difference]: Finished difference Result 117 states and 123 transitions. [2024-12-02 07:28:28,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-12-02 07:28:28,216 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2024-12-02 07:28:28,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:28,217 INFO L225 Difference]: With dead ends: 117 [2024-12-02 07:28:28,217 INFO L226 Difference]: Without dead ends: 117 [2024-12-02 07:28:28,217 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-12-02 07:28:28,217 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 47 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:28,218 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 453 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-12-02 07:28:28,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-12-02 07:28:28,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 105. [2024-12-02 07:28:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 101 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 119 transitions. [2024-12-02 07:28:28,220 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 119 transitions. Word has length 46 [2024-12-02 07:28:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:28,220 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 119 transitions. [2024-12-02 07:28:28,220 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:28,220 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 119 transitions. [2024-12-02 07:28:28,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-12-02 07:28:28,221 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:28,221 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:28,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-12-02 07:28:28,221 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:28,221 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:28,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1589864673, now seen corresponding path program 1 times [2024-12-02 07:28:28,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:28,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697148669] [2024-12-02 07:28:28,221 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:28,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:28,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:28,273 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:28,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:28,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697148669] [2024-12-02 07:28:28,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697148669] provided 1 perfect and 0 imperfect interpolant sequences [2024-12-02 07:28:28,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-12-02 07:28:28,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-12-02 07:28:28,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725461890] [2024-12-02 07:28:28,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-12-02 07:28:28,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-12-02 07:28:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:28,275 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-12-02 07:28:28,275 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-12-02 07:28:28,275 INFO L87 Difference]: Start difference. First operand 105 states and 119 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:28,327 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2024-12-02 07:28:28,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:28:28,327 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 47 [2024-12-02 07:28:28,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:28,328 INFO L225 Difference]: With dead ends: 103 [2024-12-02 07:28:28,328 INFO L226 Difference]: Without dead ends: 103 [2024-12-02 07:28:28,328 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-12-02 07:28:28,328 INFO L435 NwaCegarLoop]: 52 mSDtfsCounter, 53 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:28,329 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 97 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:28:28,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-12-02 07:28:28,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2024-12-02 07:28:28,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 99 states have internal predecessors, (112), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:28,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 116 transitions. [2024-12-02 07:28:28,331 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 116 transitions. Word has length 47 [2024-12-02 07:28:28,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:28,331 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 116 transitions. [2024-12-02 07:28:28,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-12-02 07:28:28,331 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 116 transitions. [2024-12-02 07:28:28,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 07:28:28,331 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:28,331 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:28,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-12-02 07:28:28,332 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:28,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash 1505167802, now seen corresponding path program 1 times [2024-12-02 07:28:28,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:28,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158151129] [2024-12-02 07:28:28,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:28,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-12-02 07:28:29,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158151129] [2024-12-02 07:28:29,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158151129] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:29,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284043774] [2024-12-02 07:28:29,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:29,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:29,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:29,062 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:29,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-12-02 07:28:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:29,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-12-02 07:28:29,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:29,488 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:29,741 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:29,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:29,842 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 11 treesize of output 7 [2024-12-02 07:28:29,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:29,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2024-12-02 07:28:30,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:30,020 INFO L349 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2024-12-02 07:28:30,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 37 [2024-12-02 07:28:30,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:30,625 INFO L349 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2024-12-02 07:28:30,625 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 43 [2024-12-02 07:28:30,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-12-02 07:28:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:30,795 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:30,802 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-12-02 07:28:30,802 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 11 [2024-12-02 07:28:30,994 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 34 treesize of output 22 [2024-12-02 07:28:30,996 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 26 treesize of output 18 [2024-12-02 07:28:31,197 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 228 treesize of output 220 [2024-12-02 07:28:31,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284043774] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:31,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:31,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 26] total 47 [2024-12-02 07:28:31,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321056222] [2024-12-02 07:28:31,380 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:31,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-12-02 07:28:31,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:31,380 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-12-02 07:28:31,381 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=3426, Unknown=0, NotChecked=0, Total=3660 [2024-12-02 07:28:31,381 INFO L87 Difference]: Start difference. First operand 103 states and 116 transitions. Second operand has 48 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 43 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:32,834 INFO L93 Difference]: Finished difference Result 111 states and 125 transitions. [2024-12-02 07:28:32,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-12-02 07:28:32,834 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 43 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2024-12-02 07:28:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:32,835 INFO L225 Difference]: With dead ends: 111 [2024-12-02 07:28:32,835 INFO L226 Difference]: Without dead ends: 111 [2024-12-02 07:28:32,836 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=406, Invalid=5143, Unknown=1, NotChecked=0, Total=5550 [2024-12-02 07:28:32,836 INFO L435 NwaCegarLoop]: 32 mSDtfsCounter, 112 mSDsluCounter, 1020 mSDsCounter, 0 mSdLazyCounter, 1396 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 1400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:32,836 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 1052 Invalid, 1400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1396 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-12-02 07:28:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-12-02 07:28:32,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2024-12-02 07:28:32,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.288888888888889) internal successors, (116), 102 states have internal predecessors, (116), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:32,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 120 transitions. [2024-12-02 07:28:32,838 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 120 transitions. Word has length 49 [2024-12-02 07:28:32,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:32,839 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 120 transitions. [2024-12-02 07:28:32,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 46 states have (on average 1.6956521739130435) internal successors, (78), 43 states have internal predecessors, (78), 4 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:32,839 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 120 transitions. [2024-12-02 07:28:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 07:28:32,839 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:32,839 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:32,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-12-02 07:28:33,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:33,040 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr33REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:33,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1505167803, now seen corresponding path program 1 times [2024-12-02 07:28:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:33,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146707320] [2024-12-02 07:28:33,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:33,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:34,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:34,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146707320] [2024-12-02 07:28:34,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146707320] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:34,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635373267] [2024-12-02 07:28:34,405 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:34,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:34,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:34,407 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:34,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-12-02 07:28:34,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:34,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 107 conjuncts are in the unsatisfiable core [2024-12-02 07:28:34,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:34,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:35,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:28:35,135 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:35,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:35,280 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 11 treesize of output 7 [2024-12-02 07:28:35,286 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 11 treesize of output 7 [2024-12-02 07:28:35,434 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 19 treesize of output 18 [2024-12-02 07:28:35,441 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 07:28:35,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 29 [2024-12-02 07:28:35,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-12-02 07:28:35,847 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 86 treesize of output 50 [2024-12-02 07:28:36,276 INFO L349 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2024-12-02 07:28:36,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 51 [2024-12-02 07:28:36,285 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:36,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2024-12-02 07:28:36,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:36,524 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:37,064 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 74 treesize of output 58 [2024-12-02 07:28:37,066 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 62 treesize of output 46 [2024-12-02 07:28:37,200 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_2612 (Array Int Int))) (<= 0 (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (forall ((v_ArrVal_2612 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 4) (select |c_#length| (select (select (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))))) is different from false [2024-12-02 07:28:37,211 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (and (forall ((v_ArrVal_2606 Int) (v_ArrVal_2612 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| v_ArrVal_2606)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (forall ((v_ArrVal_2606 Int) (v_ArrVal_2612 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| v_ArrVal_2606)) |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 4) (select |c_#length| (select (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4)))))) is different from false [2024-12-02 07:28:37,227 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) (and (forall ((v_ArrVal_2606 Int) (v_ArrVal_2612 (Array Int Int))) (<= (+ (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| v_ArrVal_2606)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 4) (select |c_#length| (select (select (let ((.cse1 (store |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store (select |c_#memory_$Pointer$#1.base| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|)))) (store .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base|) (+ |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.offset| 4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|))) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4)))) (forall ((v_ArrVal_2606 Int) (v_ArrVal_2612 (Array Int Int))) (<= 0 (select (select (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| (store .cse0 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| v_ArrVal_2606)) |c_ULTIMATE.start_dll_circular_create_~new_head~0#1.base| v_ArrVal_2612) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))))) is different from false [2024-12-02 07:28:37,252 INFO L349 Elim1Store]: treesize reduction 19, result has 62.0 percent of original size [2024-12-02 07:28:37,252 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 2 case distinctions, treesize of input 38 treesize of output 41 [2024-12-02 07:28:37,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:37,259 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 48 treesize of output 49 [2024-12-02 07:28:37,289 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:37,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 100 treesize of output 93 [2024-12-02 07:28:37,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:37,292 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:37,292 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:37,294 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:37,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2024-12-02 07:28:37,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635373267] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:37,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:28:37,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 51 [2024-12-02 07:28:37,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365423559] [2024-12-02 07:28:37,632 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:37,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-12-02 07:28:37,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:37,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-12-02 07:28:37,633 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3986, Unknown=3, NotChecked=384, Total=4556 [2024-12-02 07:28:37,633 INFO L87 Difference]: Start difference. First operand 106 states and 120 transitions. Second operand has 52 states, 50 states have (on average 1.78) internal successors, (89), 46 states have internal predecessors, (89), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:41,212 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2024-12-02 07:28:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-12-02 07:28:41,213 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.78) internal successors, (89), 46 states have internal predecessors, (89), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2024-12-02 07:28:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:41,214 INFO L225 Difference]: With dead ends: 111 [2024-12-02 07:28:41,214 INFO L226 Difference]: Without dead ends: 111 [2024-12-02 07:28:41,216 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1273 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=456, Invalid=7563, Unknown=3, NotChecked=534, Total=8556 [2024-12-02 07:28:41,216 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 128 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:41,216 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 976 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1642 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-12-02 07:28:41,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-12-02 07:28:41,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 106. [2024-12-02 07:28:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 90 states have (on average 1.2777777777777777) internal successors, (115), 102 states have internal predecessors, (115), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:41,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 119 transitions. [2024-12-02 07:28:41,218 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 119 transitions. Word has length 49 [2024-12-02 07:28:41,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:41,218 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 119 transitions. [2024-12-02 07:28:41,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.78) internal successors, (89), 46 states have internal predecessors, (89), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:28:41,218 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 119 transitions. [2024-12-02 07:28:41,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 07:28:41,218 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:41,219 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:41,226 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-12-02 07:28:41,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-12-02 07:28:41,419 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:41,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:41,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1148409323, now seen corresponding path program 1 times [2024-12-02 07:28:41,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:41,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767608039] [2024-12-02 07:28:41,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:41,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767608039] [2024-12-02 07:28:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767608039] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780122883] [2024-12-02 07:28:41,479 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:41,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:41,481 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:41,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-12-02 07:28:41,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:41,696 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-12-02 07:28:41,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:41,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:41,761 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:41,809 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:41,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780122883] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:41,809 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:41,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-12-02 07:28:41,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306790471] [2024-12-02 07:28:41,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:41,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-12-02 07:28:41,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:41,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-12-02 07:28:41,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:28:41,811 INFO L87 Difference]: Start difference. First operand 106 states and 119 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 07:28:41,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:41,832 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2024-12-02 07:28:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-12-02 07:28:41,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-12-02 07:28:41,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:41,833 INFO L225 Difference]: With dead ends: 116 [2024-12-02 07:28:41,833 INFO L226 Difference]: Without dead ends: 116 [2024-12-02 07:28:41,833 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-12-02 07:28:41,834 INFO L435 NwaCegarLoop]: 66 mSDtfsCounter, 143 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:41,834 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 280 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-12-02 07:28:41,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-12-02 07:28:41,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2024-12-02 07:28:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 100 states have (on average 1.25) internal successors, (125), 112 states have internal predecessors, (125), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 129 transitions. [2024-12-02 07:28:41,837 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 129 transitions. Word has length 49 [2024-12-02 07:28:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:41,837 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 129 transitions. [2024-12-02 07:28:41,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 10 states have internal predecessors, (80), 2 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-12-02 07:28:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 129 transitions. [2024-12-02 07:28:41,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-12-02 07:28:41,837 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:41,838 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:41,845 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-12-02 07:28:42,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:42,038 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:42,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:42,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1148292939, now seen corresponding path program 1 times [2024-12-02 07:28:42,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:42,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940458798] [2024-12-02 07:28:42,039 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:42,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:42,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940458798] [2024-12-02 07:28:42,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940458798] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:42,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875478183] [2024-12-02 07:28:42,588 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:42,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:42,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:42,589 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:42,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-12-02 07:28:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:42,785 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-12-02 07:28:42,787 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:42,789 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:42,827 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:42,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:42,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-12-02 07:28:42,942 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:42,942 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 24 [2024-12-02 07:28:43,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2024-12-02 07:28:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:43,066 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:43,169 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 8 treesize of output 4 [2024-12-02 07:28:43,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-12-02 07:28:43,204 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 13 treesize of output 11 [2024-12-02 07:28:43,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2024-12-02 07:28:43,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:43,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875478183] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:43,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:43,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 40 [2024-12-02 07:28:43,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221399161] [2024-12-02 07:28:43,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:43,532 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-12-02 07:28:43,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:43,532 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-12-02 07:28:43,532 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1438, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 07:28:43,533 INFO L87 Difference]: Start difference. First operand 116 states and 129 transitions. Second operand has 40 states, 40 states have (on average 1.95) internal successors, (78), 35 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-12-02 07:28:44,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:44,319 INFO L93 Difference]: Finished difference Result 111 states and 123 transitions. [2024-12-02 07:28:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 07:28:44,320 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.95) internal successors, (78), 35 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 49 [2024-12-02 07:28:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:44,320 INFO L225 Difference]: With dead ends: 111 [2024-12-02 07:28:44,320 INFO L226 Difference]: Without dead ends: 109 [2024-12-02 07:28:44,320 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2024-12-02 07:28:44,321 INFO L435 NwaCegarLoop]: 40 mSDtfsCounter, 43 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 932 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:44,321 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 932 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-12-02 07:28:44,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-12-02 07:28:44,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-12-02 07:28:44,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 105 states have internal predecessors, (117), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:44,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2024-12-02 07:28:44,323 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 49 [2024-12-02 07:28:44,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:44,323 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2024-12-02 07:28:44,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.95) internal successors, (78), 35 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-12-02 07:28:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2024-12-02 07:28:44,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-12-02 07:28:44,323 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:44,324 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:44,330 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-12-02 07:28:44,524 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:44,524 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:44,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash -116936253, now seen corresponding path program 1 times [2024-12-02 07:28:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:44,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529357225] [2024-12-02 07:28:44,525 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:44,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:44,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-12-02 07:28:44,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:44,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529357225] [2024-12-02 07:28:44,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529357225] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:44,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126369467] [2024-12-02 07:28:44,652 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:44,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:44,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:44,654 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:44,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-12-02 07:28:44,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:44,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 432 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-12-02 07:28:44,936 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:44,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:45,124 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 7 treesize of output 3 [2024-12-02 07:28:45,213 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 18 treesize of output 13 [2024-12-02 07:28:45,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-12-02 07:28:45,273 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:45,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:45,574 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 39 treesize of output 27 [2024-12-02 07:28:45,577 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 31 treesize of output 23 [2024-12-02 07:28:45,797 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:28:45,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126369467] provided 0 perfect and 2 imperfect interpolant sequences [2024-12-02 07:28:45,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-12-02 07:28:45,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 16, 15] total 30 [2024-12-02 07:28:45,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883491007] [2024-12-02 07:28:45,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-12-02 07:28:45,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-12-02 07:28:45,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:28:45,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-12-02 07:28:45,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2024-12-02 07:28:45,800 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand has 31 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 07:28:46,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:28:46,397 INFO L93 Difference]: Finished difference Result 141 states and 147 transitions. [2024-12-02 07:28:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-12-02 07:28:46,397 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2024-12-02 07:28:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:28:46,398 INFO L225 Difference]: With dead ends: 141 [2024-12-02 07:28:46,398 INFO L226 Difference]: Without dead ends: 141 [2024-12-02 07:28:46,398 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2024-12-02 07:28:46,399 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 208 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 795 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-12-02 07:28:46,399 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 481 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 795 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-12-02 07:28:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-12-02 07:28:46,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 114. [2024-12-02 07:28:46,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 98 states have (on average 1.2448979591836735) internal successors, (122), 110 states have internal predecessors, (122), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:28:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2024-12-02 07:28:46,402 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 55 [2024-12-02 07:28:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:28:46,402 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2024-12-02 07:28:46,402 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 3.7333333333333334) internal successors, (112), 29 states have internal predecessors, (112), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-12-02 07:28:46,402 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2024-12-02 07:28:46,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-12-02 07:28:46,402 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:28:46,403 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:28:46,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-12-02 07:28:46,603 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:46,603 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr22REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:28:46,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:28:46,603 INFO L85 PathProgramCache]: Analyzing trace with hash -426783418, now seen corresponding path program 1 times [2024-12-02 07:28:46,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:28:46,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46197932] [2024-12-02 07:28:46,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:46,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:28:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:49,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:28:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46197932] [2024-12-02 07:28:49,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46197932] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:28:49,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271343214] [2024-12-02 07:28:49,176 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:28:49,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:28:49,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:28:49,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:28:49,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-12-02 07:28:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:28:49,549 INFO L256 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 173 conjuncts are in the unsatisfiable core [2024-12-02 07:28:49,555 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:28:49,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-12-02 07:28:49,591 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-12-02 07:28:49,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-12-02 07:28:49,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-12-02 07:28:50,113 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-12-02 07:28:50,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2024-12-02 07:28:50,126 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-12-02 07:28:50,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-12-02 07:28:50,135 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-12-02 07:28:50,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-12-02 07:28:50,271 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 11 treesize of output 7 [2024-12-02 07:28:50,277 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 19 treesize of output 11 [2024-12-02 07:28:50,437 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 07:28:50,447 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 19 treesize of output 18 [2024-12-02 07:28:50,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 36 [2024-12-02 07:28:50,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-12-02 07:28:51,955 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 20 treesize of output 19 [2024-12-02 07:28:52,330 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:52,330 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:52,344 INFO L349 Elim1Store]: treesize reduction 84, result has 11.6 percent of original size [2024-12-02 07:28:52,345 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 165 treesize of output 83 [2024-12-02 07:28:52,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:52,354 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:52,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 41 [2024-12-02 07:28:52,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:52,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 59 [2024-12-02 07:28:52,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-12-02 07:28:52,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 50 [2024-12-02 07:28:52,778 INFO L349 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2024-12-02 07:28:52,779 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 19 [2024-12-02 07:28:53,355 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-12-02 07:28:53,355 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 35 [2024-12-02 07:28:53,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 13 [2024-12-02 07:28:53,570 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 16 [2024-12-02 07:28:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-12-02 07:28:53,669 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-12-02 07:28:55,069 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-12-02 07:28:55,069 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2024-12-02 07:28:57,144 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 428 treesize of output 316 [2024-12-02 07:28:57,147 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 329 treesize of output 233 [2024-12-02 07:28:58,584 INFO L173 IndexEqualityManager]: detected equality via solver [2024-12-02 07:28:58,690 INFO L349 Elim1Store]: treesize reduction 15, result has 65.9 percent of original size [2024-12-02 07:28:58,691 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 2930 treesize of output 2920 [2024-12-02 07:28:58,827 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:58,827 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 39 treesize of output 41 [2024-12-02 07:28:58,868 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 07:28:59,053 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-12-02 07:28:59,053 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 46 treesize of output 46 [2024-12-02 07:29:41,277 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse3 (+ |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 4)) (.cse11 (select |c_#length| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))) (or (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) (let ((.cse44 (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|)) (.cse46 (= 0 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|))) (let ((.cse8 (and .cse44 .cse46)) (.cse7 (+ 4 |c_ULTIMATE.start_dll_circular_create_~head~0#1.offset|)) (.cse0 (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| 4))) (and (or .cse0 (forall ((v_ArrVal_3245 (Array Int Int)) (v_arrayElimCell_115 Int)) (let ((.cse1 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (let ((.cse2 (select (select (let ((.cse4 (store (select .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse6 (store .cse1 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse4))) (let ((.cse5 (store (select .cse6 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse4) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse5) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store (select (store .cse6 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse5) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|))))) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (or (< (select (select .cse1 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 0) (< (+ 7 .cse2) (select |c_#length| v_arrayElimCell_115)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_arrayElimCell_115) (= .cse3 .cse2))))) .cse8) (forall ((v_ArrVal_3245 (Array Int Int))) (let ((.cse9 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (let ((.cse17 (store (select .cse9 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse15 (store .cse9 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse17))) (let ((.cse16 (store (select .cse15 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse13 (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse17) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse16)) (.cse14 (select (store .cse15 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse16) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))) (let ((.cse10 (select (select (store .cse13 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse14 .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (or (< (select (select .cse9 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 0) (< (+ 7 .cse10) .cse11) (forall ((v_arrayElimCell_115 Int)) (or (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_arrayElimCell_115) (< (+ (select (select (let ((.cse12 (store .cse13 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse14 .cse3 .cse10)))) (store .cse12 v_arrayElimCell_115 (store (select .cse12 v_arrayElimCell_115) .cse10 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) .cse3) 7) (select |c_#length| v_arrayElimCell_115)))))))))))) (or .cse0 (and (forall ((v_ArrVal_3245 (Array Int Int))) (let ((.cse18 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (or (< (select (select .cse18 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 0) (forall ((v_arrayElimCell_115 Int)) (or (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_arrayElimCell_115) (< (+ (select (select (let ((.cse25 (store (select .cse18 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse23 (store .cse18 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse25))) (let ((.cse24 (store (select .cse23 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse21 (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse25) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse24)) (.cse22 (select (store .cse23 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse24) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))) (let ((.cse20 (select (select (store .cse21 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse22 .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (let ((.cse19 (store .cse21 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse22 .cse3 .cse20)))) (store .cse19 v_arrayElimCell_115 (store (select .cse19 v_arrayElimCell_115) .cse20 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|)))))))) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) .cse3) 7) (select |c_#length| v_arrayElimCell_115))))))) (forall ((v_ArrVal_3245 (Array Int Int))) (let ((.cse31 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (or (< (+ 7 (select (let ((.cse28 (store (select .cse31 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse30 (store .cse31 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse28))) (let ((.cse29 (store (select .cse30 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse26 (select (store .cse30 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse29) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))) (let ((.cse27 (select (select (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse28) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse29) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse26 .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (store (store .cse26 .cse3 .cse27) .cse27 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|)))))) .cse3)) .cse11) (< (select (select .cse31 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 0))))) .cse8) (or .cse0 (forall ((v_ArrVal_3245 (Array Int Int)) (v_arrayElimCell_115 Int)) (let ((.cse32 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (or (< (select (select .cse32 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 0) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_arrayElimCell_115) (< (+ (select (select (let ((.cse39 (store (select .cse32 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse37 (store .cse32 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse39))) (let ((.cse38 (store (select .cse37 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse35 (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse39) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse38)) (.cse36 (select (store .cse37 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse38) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|))) (let ((.cse34 (select (select (store .cse35 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse36 .cse3 |c_ULTIMATE.start_dll_circular_create_~last~0#1.offset|)) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4))) (let ((.cse33 (store .cse35 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store .cse36 .cse3 .cse34)))) (store .cse33 v_arrayElimCell_115 (store (select .cse33 v_arrayElimCell_115) .cse34 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|)))))))) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) .cse3) 7) (select |c_#length| v_arrayElimCell_115))))) .cse8) (or (let ((.cse45 (forall ((v_ArrVal_3245 (Array Int Int)) (v_ArrVal_3251 Int)) (or (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3251) (< (+ 7 (select (select (let ((.cse50 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (let ((.cse47 (store (select .cse50 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) .cse7 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse49 (store .cse50 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse47))) (let ((.cse48 (store (select .cse49 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse47) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse48) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store (select (store .cse49 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse48) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) .cse3 4)))))) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4)) (select |c_#length| v_ArrVal_3251)))))) (and (forall ((v_ArrVal_3245 (Array Int Int)) (v_ArrVal_3251 Int)) (or (< (+ (select (select (let ((.cse43 (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| v_ArrVal_3245))) (let ((.cse40 (store (select .cse43 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base|) 4 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (let ((.cse42 (store .cse43 |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse40))) (let ((.cse41 (store (select .cse42 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4 |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset|))) (store (store (store |c_#memory_$Pointer$#1.offset| |c_ULTIMATE.start_dll_circular_create_~head~0#1.base| .cse40) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse41) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base| (store (select (store .cse42 |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| .cse41) |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.base|) .cse3 4)))))) |c_ULTIMATE.start_dll_circular_create_~last~0#1.base|) 4) 7) (select |c_#length| v_ArrVal_3251)) (= |c_ULTIMATE.start_dll_circular_create_~last~0#1.base| v_ArrVal_3251))) (or .cse44 .cse45) (or .cse46 .cse45))) (< |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 0) (not .cse0))))) (< .cse3 0) (< .cse11 (+ |c_ULTIMATE.start_dll_circular_create_#t~ret5#1.offset| 8)))) is different from false [2024-12-02 07:29:45,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271343214] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:45,506 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-12-02 07:29:45,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 70 [2024-12-02 07:29:45,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917905302] [2024-12-02 07:29:45,506 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-12-02 07:29:45,506 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-12-02 07:29:45,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-12-02 07:29:45,507 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-12-02 07:29:45,508 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=8788, Unknown=10, NotChecked=190, Total=9506 [2024-12-02 07:29:45,508 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand has 70 states, 69 states have (on average 1.565217391304348) internal successors, (108), 64 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:29:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-12-02 07:29:54,299 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2024-12-02 07:29:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-12-02 07:29:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.565217391304348) internal successors, (108), 64 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 59 [2024-12-02 07:29:54,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-12-02 07:29:54,300 INFO L225 Difference]: With dead ends: 103 [2024-12-02 07:29:54,300 INFO L226 Difference]: Without dead ends: 103 [2024-12-02 07:29:54,302 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3332 ImplicationChecksByTransitivity, 56.5s TimeCoverageRelationStatistics Valid=696, Invalid=11508, Unknown=10, NotChecked=218, Total=12432 [2024-12-02 07:29:54,302 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 95 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1998 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 2000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-12-02 07:29:54,302 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 1157 Invalid, 2000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1998 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-12-02 07:29:54,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-12-02 07:29:54,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-12-02 07:29:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 85 states have (on average 1.188235294117647) internal successors, (101), 97 states have internal predecessors, (101), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-12-02 07:29:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2024-12-02 07:29:54,304 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 59 [2024-12-02 07:29:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-12-02 07:29:54,304 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2024-12-02 07:29:54,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.565217391304348) internal successors, (108), 64 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-12-02 07:29:54,304 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2024-12-02 07:29:54,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-12-02 07:29:54,305 INFO L210 NwaCegarLoop]: Found error trace [2024-12-02 07:29:54,305 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-12-02 07:29:54,316 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-12-02 07:29:54,505 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:54,505 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr37ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-12-02 07:29:54,505 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-12-02 07:29:54,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1773666440, now seen corresponding path program 1 times [2024-12-02 07:29:54,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-12-02 07:29:54,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301983437] [2024-12-02 07:29:54,506 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:54,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-12-02 07:29:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:58,376 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-12-02 07:29:58,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-12-02 07:29:58,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301983437] [2024-12-02 07:29:58,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301983437] provided 0 perfect and 1 imperfect interpolant sequences [2024-12-02 07:29:58,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599966278] [2024-12-02 07:29:58,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-12-02 07:29:58,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-12-02 07:29:58,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 [2024-12-02 07:29:58,377 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-12-02 07:29:58,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_18c47c9a-25b8-4bdb-9ddc-d113ca3cb06f/bin/uautomizer-verify-84ZbGMXZE1/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-12-02 07:29:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-12-02 07:29:58,621 INFO L256 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-12-02 07:29:58,624 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-12-02 07:29:58,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-12-02 07:29:59,341 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-12-02 07:29:59,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 19 [2024-12-02 07:30:00,778 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 15 treesize of output 1 [2024-12-02 07:30:04,510 INFO L349 Elim1Store]: treesize reduction 32, result has 63.6 percent of original size [2024-12-02 07:30:04,510 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 2 case distinctions, treesize of input 486 treesize of output 323 [2024-12-02 07:30:09,871 INFO L349 Elim1Store]: treesize reduction 216, result has 72.3 percent of original size [2024-12-02 07:30:09,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 21 case distinctions, treesize of input 1247 treesize of output 1458 [2024-12-02 07:30:09,919 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