./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:02:47,752 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:02:47,859 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-06 23:02:47,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:02:47,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:02:47,897 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:02:47,898 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:02:47,899 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:02:47,900 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:02:47,901 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:02:47,902 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:02:47,902 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:02:47,903 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:02:47,904 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:02:47,904 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:02:47,905 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:02:47,906 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:02:47,906 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:02:47,907 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 23:02:47,908 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 23:02:47,908 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 23:02:47,909 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:02:47,910 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 23:02:47,911 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 23:02:47,911 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:02:47,912 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:02:47,913 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:02:47,913 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:02:47,914 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:02:47,915 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:47,915 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:02:47,916 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:02:47,917 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:02:47,917 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:02:47,918 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:02:47,919 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:02:47,919 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:02:47,920 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:02:47,921 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b81f923e96224472f8219a473f794261ff02356a47c6b09b527f0fc600725a8 [2023-11-06 23:02:48,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:02:48,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:02:48,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:02:48,291 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:02:48,292 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:02:48,293 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2023-11-06 23:02:51,572 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:02:51,855 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:02:51,856 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/sv-benchmarks/c/list-simple/dll2c_insert_unequal.i [2023-11-06 23:02:51,881 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/data/0ad1386ce/db5f7b95ca094169ace9f371f9863d0b/FLAG305c55d03 [2023-11-06 23:02:51,896 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/data/0ad1386ce/db5f7b95ca094169ace9f371f9863d0b [2023-11-06 23:02:51,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:02:51,900 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:02:51,902 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:51,902 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:02:51,907 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:02:51,908 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:51" (1/1) ... [2023-11-06 23:02:51,909 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19115290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:51, skipping insertion in model container [2023-11-06 23:02:51,910 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:02:51" (1/1) ... [2023-11-06 23:02:51,962 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:02:52,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:52,370 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:02:52,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:02:52,499 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:02:52,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52 WrapperNode [2023-11-06 23:02:52,500 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:02:52,501 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:52,502 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:02:52,502 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:02:52,510 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,530 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,574 INFO L138 Inliner]: procedures = 127, calls = 59, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 196 [2023-11-06 23:02:52,578 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:02:52,579 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:02:52,579 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:02:52,579 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:02:52,599 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,601 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,609 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,609 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,622 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,626 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,629 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,631 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,636 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:02:52,637 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:02:52,637 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:02:52,637 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:02:52,638 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (1/1) ... [2023-11-06 23:02:52,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:02:52,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:52,741 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:02:52,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:02:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 23:02:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 23:02:52,782 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-11-06 23:02:52,782 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-11-06 23:02:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-06 23:02:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:02:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 23:02:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-06 23:02:52,783 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-06 23:02:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 23:02:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-06 23:02:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:02:52,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:02:52,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:02:52,933 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:02:52,934 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:02:53,483 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:02:53,496 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:02:53,496 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-06 23:02:53,500 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:53 BoogieIcfgContainer [2023-11-06 23:02:53,500 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:02:53,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:02:53,505 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:02:53,508 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:02:53,508 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:02:51" (1/3) ... [2023-11-06 23:02:53,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcfe183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:53, skipping insertion in model container [2023-11-06 23:02:53,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:02:52" (2/3) ... [2023-11-06 23:02:53,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7fcfe183 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:02:53, skipping insertion in model container [2023-11-06 23:02:53,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:02:53" (3/3) ... [2023-11-06 23:02:53,513 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_insert_unequal.i [2023-11-06 23:02:53,541 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:02:53,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 82 error locations. [2023-11-06 23:02:53,606 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:02:53,612 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@72944ddf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:02:53,613 INFO L358 AbstractCegarLoop]: Starting to check reachability of 82 error locations. [2023-11-06 23:02:53,617 INFO L276 IsEmpty]: Start isEmpty. Operand has 177 states, 90 states have (on average 2.1333333333333333) internal successors, (192), 172 states have internal predecessors, (192), 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) [2023-11-06 23:02:53,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 23:02:53,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:53,625 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:53,625 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:53,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:53,631 INFO L85 PathProgramCache]: Analyzing trace with hash 897981362, now seen corresponding path program 1 times [2023-11-06 23:02:53,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:53,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317798415] [2023-11-06 23:02:53,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:53,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:54,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:54,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:54,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317798415] [2023-11-06 23:02:54,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317798415] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:54,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:54,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:54,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470042335] [2023-11-06 23:02:54,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:54,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:54,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:54,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:54,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:54,103 INFO L87 Difference]: Start difference. First operand has 177 states, 90 states have (on average 2.1333333333333333) internal successors, (192), 172 states have internal predecessors, (192), 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) 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) [2023-11-06 23:02:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:54,410 INFO L93 Difference]: Finished difference Result 173 states and 187 transitions. [2023-11-06 23:02:54,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:54,414 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 [2023-11-06 23:02:54,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:54,431 INFO L225 Difference]: With dead ends: 173 [2023-11-06 23:02:54,432 INFO L226 Difference]: Without dead ends: 170 [2023-11-06 23:02:54,434 INFO L412 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 [2023-11-06 23:02:54,438 INFO L413 NwaCegarLoop]: 178 mSDtfsCounter, 10 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:54,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 273 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:02:54,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-06 23:02:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2023-11-06 23:02:54,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 87 states have (on average 2.0344827586206895) internal successors, (177), 165 states have internal predecessors, (177), 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) [2023-11-06 23:02:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 183 transitions. [2023-11-06 23:02:54,493 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 183 transitions. Word has length 6 [2023-11-06 23:02:54,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:54,494 INFO L495 AbstractCegarLoop]: Abstraction has 170 states and 183 transitions. [2023-11-06 23:02:54,494 INFO L496 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) [2023-11-06 23:02:54,494 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 183 transitions. [2023-11-06 23:02:54,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-06 23:02:54,495 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:54,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-06 23:02:54,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 23:02:54,496 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:54,496 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:54,497 INFO L85 PathProgramCache]: Analyzing trace with hash 897981363, now seen corresponding path program 1 times [2023-11-06 23:02:54,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:54,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280550804] [2023-11-06 23:02:54,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:54,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:54,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:54,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280550804] [2023-11-06 23:02:54,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280550804] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:54,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:54,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:02:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339331935] [2023-11-06 23:02:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:54,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:02:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:02:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:02:54,683 INFO L87 Difference]: Start difference. First operand 170 states and 183 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) [2023-11-06 23:02:54,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:54,898 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2023-11-06 23:02:54,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:02:54,900 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 [2023-11-06 23:02:54,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:54,907 INFO L225 Difference]: With dead ends: 167 [2023-11-06 23:02:54,907 INFO L226 Difference]: Without dead ends: 167 [2023-11-06 23:02:54,912 INFO L412 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 [2023-11-06 23:02:54,914 INFO L413 NwaCegarLoop]: 175 mSDtfsCounter, 5 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:54,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 275 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:02:54,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-06 23:02:54,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-06 23:02:54,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 87 states have (on average 2.0) internal successors, (174), 162 states have internal predecessors, (174), 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) [2023-11-06 23:02:54,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2023-11-06 23:02:54,950 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 6 [2023-11-06 23:02:54,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:54,950 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2023-11-06 23:02:54,951 INFO L496 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) [2023-11-06 23:02:54,951 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2023-11-06 23:02:54,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-06 23:02:54,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:54,953 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:54,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 23:02:54,954 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:54,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:54,965 INFO L85 PathProgramCache]: Analyzing trace with hash 660359637, now seen corresponding path program 1 times [2023-11-06 23:02:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706289646] [2023-11-06 23:02:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:54,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:55,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:02:55,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 23:02:55,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:55,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706289646] [2023-11-06 23:02:55,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706289646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:55,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:55,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:02:55,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635282373] [2023-11-06 23:02:55,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:55,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:02:55,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:02:55,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:55,158 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand has 4 states, 4 states have (on average 3.0) 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) [2023-11-06 23:02:55,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:55,404 INFO L93 Difference]: Finished difference Result 178 states and 193 transitions. [2023-11-06 23:02:55,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:02:55,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) 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 [2023-11-06 23:02:55,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:55,408 INFO L225 Difference]: With dead ends: 178 [2023-11-06 23:02:55,412 INFO L226 Difference]: Without dead ends: 178 [2023-11-06 23:02:55,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:02:55,420 INFO L413 NwaCegarLoop]: 177 mSDtfsCounter, 10 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:55,423 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 409 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:02:55,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-06 23:02:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2023-11-06 23:02:55,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 88 states have (on average 1.9886363636363635) internal successors, (175), 163 states have internal predecessors, (175), 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) [2023-11-06 23:02:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2023-11-06 23:02:55,446 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 14 [2023-11-06 23:02:55,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:55,453 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2023-11-06 23:02:55,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) 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) [2023-11-06 23:02:55,454 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2023-11-06 23:02:55,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 23:02:55,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:55,456 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:55,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-06 23:02:55,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:55,457 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:55,457 INFO L85 PathProgramCache]: Analyzing trace with hash 669519168, now seen corresponding path program 1 times [2023-11-06 23:02:55,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:55,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913752083] [2023-11-06 23:02:55,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:55,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:02:55,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:02:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:02:55,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:55,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913752083] [2023-11-06 23:02:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913752083] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:55,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:02:55,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613273661] [2023-11-06 23:02:55,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:55,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:02:55,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:55,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:02:55,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:55,796 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 7 states, 6 states have (on average 3.0) 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) [2023-11-06 23:02:56,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:56,235 INFO L93 Difference]: Finished difference Result 167 states and 180 transitions. [2023-11-06 23:02:56,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:02:56,236 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) 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 [2023-11-06 23:02:56,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:56,237 INFO L225 Difference]: With dead ends: 167 [2023-11-06 23:02:56,237 INFO L226 Difference]: Without dead ends: 167 [2023-11-06 23:02:56,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:56,239 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 10 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:56,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 583 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:02:56,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-06 23:02:56,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2023-11-06 23:02:56,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 88 states have (on average 1.9772727272727273) internal successors, (174), 162 states have internal predecessors, (174), 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) [2023-11-06 23:02:56,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 180 transitions. [2023-11-06 23:02:56,249 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 180 transitions. Word has length 24 [2023-11-06 23:02:56,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:56,250 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 180 transitions. [2023-11-06 23:02:56,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) 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) [2023-11-06 23:02:56,250 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 180 transitions. [2023-11-06 23:02:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-06 23:02:56,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:56,251 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:56,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-06 23:02:56,252 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:56,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:56,252 INFO L85 PathProgramCache]: Analyzing trace with hash 669519169, now seen corresponding path program 1 times [2023-11-06 23:02:56,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:56,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753722685] [2023-11-06 23:02:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:56,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:56,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:02:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:56,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:02:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:56,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:56,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753722685] [2023-11-06 23:02:56,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753722685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:02:56,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:02:56,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:02:56,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739292806] [2023-11-06 23:02:56,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:02:56,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:02:56,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:56,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:02:56,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:02:56,664 INFO L87 Difference]: Start difference. First operand 167 states and 180 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) 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) [2023-11-06 23:02:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:57,083 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2023-11-06 23:02:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:02:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) 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 [2023-11-06 23:02:57,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:57,084 INFO L225 Difference]: With dead ends: 166 [2023-11-06 23:02:57,084 INFO L226 Difference]: Without dead ends: 166 [2023-11-06 23:02:57,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:02:57,086 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 8 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:57,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 607 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:02:57,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-06 23:02:57,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-06 23:02:57,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 161 states have internal predecessors, (173), 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) [2023-11-06 23:02:57,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 179 transitions. [2023-11-06 23:02:57,095 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 179 transitions. Word has length 24 [2023-11-06 23:02:57,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:57,095 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 179 transitions. [2023-11-06 23:02:57,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) 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) [2023-11-06 23:02:57,096 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 179 transitions. [2023-11-06 23:02:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 23:02:57,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:57,097 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:57,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-06 23:02:57,097 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:57,098 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:57,098 INFO L85 PathProgramCache]: Analyzing trace with hash -837174239, now seen corresponding path program 1 times [2023-11-06 23:02:57,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:57,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920664537] [2023-11-06 23:02:57,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:57,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:57,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:02:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:57,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:02:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:57,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920664537] [2023-11-06 23:02:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920664537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280801130] [2023-11-06 23:02:57,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:57,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:57,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:57,515 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:57,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:02:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:57,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-06 23:02:57,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:57,755 INFO L351 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 [2023-11-06 23:02:57,825 WARN L861 $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 [2023-11-06 23:02:57,940 INFO L322 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-06 23:02:57,941 INFO L351 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 [2023-11-06 23:02:57,953 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-06 23:02:57,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:02:58,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280801130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:58,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:02:58,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2023-11-06 23:02:58,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229940312] [2023-11-06 23:02:58,037 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:02:58,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:02:58,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:02:58,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:02:58,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=1, NotChecked=18, Total=132 [2023-11-06 23:02:58,040 INFO L87 Difference]: Start difference. First operand 166 states and 179 transitions. Second operand has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:02:58,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:02:58,507 INFO L93 Difference]: Finished difference Result 173 states and 188 transitions. [2023-11-06 23:02:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:02:58,508 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-06 23:02:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:02:58,510 INFO L225 Difference]: With dead ends: 173 [2023-11-06 23:02:58,510 INFO L226 Difference]: Without dead ends: 173 [2023-11-06 23:02:58,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=121, Unknown=1, NotChecked=22, Total=182 [2023-11-06 23:02:58,512 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 8 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:02:58,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 596 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 458 Invalid, 0 Unknown, 181 Unchecked, 0.4s Time] [2023-11-06 23:02:58,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-06 23:02:58,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-11-06 23:02:58,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 92 states have (on average 1.9456521739130435) internal successors, (179), 165 states have internal predecessors, (179), 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) [2023-11-06 23:02:58,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 187 transitions. [2023-11-06 23:02:58,528 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 187 transitions. Word has length 26 [2023-11-06 23:02:58,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:02:58,528 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 187 transitions. [2023-11-06 23:02:58,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.2) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:02:58,529 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 187 transitions. [2023-11-06 23:02:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 23:02:58,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:02:58,530 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:02:58,539 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:02:58,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:02:58,736 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:02:58,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:02:58,737 INFO L85 PathProgramCache]: Analyzing trace with hash -837174238, now seen corresponding path program 1 times [2023-11-06 23:02:58,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:02:58,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849490565] [2023-11-06 23:02:58,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:58,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:02:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:02:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:02:59,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:02:59,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:02:59,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849490565] [2023-11-06 23:02:59,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849490565] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:02:59,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58071466] [2023-11-06 23:02:59,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:02:59,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:02:59,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:02:59,433 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:02:59,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:02:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:02:59,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:02:59,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:02:59,621 INFO L351 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 [2023-11-06 23:02:59,740 WARN L861 $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 [2023-11-06 23:02:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:02:59,818 INFO L351 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 [2023-11-06 23:02:59,828 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:02:59,828 INFO L351 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 [2023-11-06 23:02:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 7 not checked. [2023-11-06 23:02:59,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:00,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58071466] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:00,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:00,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2023-11-06 23:03:00,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288627412] [2023-11-06 23:03:00,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:00,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:03:00,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:00,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:03:00,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=173, Unknown=1, NotChecked=26, Total=240 [2023-11-06 23:03:00,008 INFO L87 Difference]: Start difference. First operand 171 states and 187 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:00,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:00,788 INFO L93 Difference]: Finished difference Result 173 states and 188 transitions. [2023-11-06 23:03:00,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:00,789 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-11-06 23:03:00,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:00,791 INFO L225 Difference]: With dead ends: 173 [2023-11-06 23:03:00,791 INFO L226 Difference]: Without dead ends: 173 [2023-11-06 23:03:00,791 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=219, Unknown=1, NotChecked=30, Total=306 [2023-11-06 23:03:00,792 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 11 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 826 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:00,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 928 Invalid, 1011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 826 Invalid, 0 Unknown, 181 Unchecked, 0.7s Time] [2023-11-06 23:03:00,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-11-06 23:03:00,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 171. [2023-11-06 23:03:00,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 92 states have (on average 1.934782608695652) internal successors, (178), 165 states have internal predecessors, (178), 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) [2023-11-06 23:03:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 186 transitions. [2023-11-06 23:03:00,800 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 186 transitions. Word has length 26 [2023-11-06 23:03:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:00,800 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 186 transitions. [2023-11-06 23:03:00,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 11 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 186 transitions. [2023-11-06 23:03:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-06 23:03:00,802 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:00,802 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:00,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:01,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:01,008 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:01,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:01,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1365405193, now seen corresponding path program 1 times [2023-11-06 23:03:01,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:01,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723394246] [2023-11-06 23:03:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:01,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:01,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:01,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:01,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:01,214 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:01,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:01,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723394246] [2023-11-06 23:03:01,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723394246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:01,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397299470] [2023-11-06 23:03:01,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:01,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:01,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:01,217 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:01,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:03:01,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:01,380 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 23:03:01,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:01,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:01,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:01,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397299470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:01,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:01,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2023-11-06 23:03:01,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166323959] [2023-11-06 23:03:01,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:01,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:01,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:01,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:01,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:01,466 INFO L87 Difference]: Start difference. First operand 171 states and 186 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:03:01,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:01,703 INFO L93 Difference]: Finished difference Result 172 states and 186 transitions. [2023-11-06 23:03:01,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:01,704 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2023-11-06 23:03:01,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:01,705 INFO L225 Difference]: With dead ends: 172 [2023-11-06 23:03:01,705 INFO L226 Difference]: Without dead ends: 172 [2023-11-06 23:03:01,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:01,706 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 4 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:01,707 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 882 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-06 23:03:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2023-11-06 23:03:01,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 92 states have (on average 1.923913043478261) internal successors, (177), 165 states have internal predecessors, (177), 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) [2023-11-06 23:03:01,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 185 transitions. [2023-11-06 23:03:01,716 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 185 transitions. Word has length 28 [2023-11-06 23:03:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:01,716 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 185 transitions. [2023-11-06 23:03:01,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-06 23:03:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 185 transitions. [2023-11-06 23:03:01,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:03:01,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:01,720 INFO L195 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] [2023-11-06 23:03:01,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:01,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:01,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:01,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash 617331314, now seen corresponding path program 1 times [2023-11-06 23:03:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:01,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988263074] [2023-11-06 23:03:01,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:01,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:02,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:03:02,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:02,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988263074] [2023-11-06 23:03:02,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988263074] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:02,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17900609] [2023-11-06 23:03:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:02,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:02,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:02,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:02,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:03:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:02,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:03:02,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:03:02,261 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:02,274 INFO L322 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2023-11-06 23:03:02,275 INFO L351 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 [2023-11-06 23:03:02,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:03:02,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17900609] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:02,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:02,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 5 [2023-11-06 23:03:02,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416307642] [2023-11-06 23:03:02,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:02,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:03:02,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:02,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:03:02,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:02,298 INFO L87 Difference]: Start difference. First operand 171 states and 185 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:02,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:02,634 INFO L93 Difference]: Finished difference Result 176 states and 192 transitions. [2023-11-06 23:03:02,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:02,635 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2023-11-06 23:03:02,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:02,638 INFO L225 Difference]: With dead ends: 176 [2023-11-06 23:03:02,638 INFO L226 Difference]: Without dead ends: 176 [2023-11-06 23:03:02,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:02,642 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 9 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:02,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 575 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:03:02,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-06 23:03:02,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 174. [2023-11-06 23:03:02,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 95 states have (on average 1.9157894736842105) internal successors, (182), 168 states have internal predecessors, (182), 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) [2023-11-06 23:03:02,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 190 transitions. [2023-11-06 23:03:02,649 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 190 transitions. Word has length 29 [2023-11-06 23:03:02,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:02,650 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 190 transitions. [2023-11-06 23:03:02,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 190 transitions. [2023-11-06 23:03:02,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-06 23:03:02,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:02,654 INFO L195 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] [2023-11-06 23:03:02,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:02,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:02,860 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:02,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:02,861 INFO L85 PathProgramCache]: Analyzing trace with hash 617331315, now seen corresponding path program 1 times [2023-11-06 23:03:02,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:02,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693242220] [2023-11-06 23:03:02,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:02,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:02,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:03,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:03,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:03,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:03,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:03,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693242220] [2023-11-06 23:03:03,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693242220] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:03,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607144498] [2023-11-06 23:03:03,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:03,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:03,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:03,190 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:03,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:03:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:03,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-06 23:03:03,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:03,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:03,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:03,616 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:03:03,616 INFO L351 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 19 treesize of output 23 [2023-11-06 23:03:03,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:03,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607144498] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:03:03,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:03:03,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 15 [2023-11-06 23:03:03,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296410890] [2023-11-06 23:03:03,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:03,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:03:03,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:03,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:03:03,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:03:03,837 INFO L87 Difference]: Start difference. First operand 174 states and 190 transitions. Second operand has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-06 23:03:04,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:04,331 INFO L93 Difference]: Finished difference Result 180 states and 196 transitions. [2023-11-06 23:03:04,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:03:04,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-11-06 23:03:04,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:04,335 INFO L225 Difference]: With dead ends: 180 [2023-11-06 23:03:04,335 INFO L226 Difference]: Without dead ends: 180 [2023-11-06 23:03:04,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2023-11-06 23:03:04,336 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 26 mSDsluCounter, 1001 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 1169 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:04,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 1169 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:03:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-11-06 23:03:04,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2023-11-06 23:03:04,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 95 states have (on average 1.9052631578947368) internal successors, (181), 168 states have internal predecessors, (181), 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) [2023-11-06 23:03:04,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 189 transitions. [2023-11-06 23:03:04,346 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 189 transitions. Word has length 29 [2023-11-06 23:03:04,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:04,346 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 189 transitions. [2023-11-06 23:03:04,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.4) internal successors, (51), 13 states have internal predecessors, (51), 4 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-11-06 23:03:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 189 transitions. [2023-11-06 23:03:04,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 23:03:04,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:04,353 INFO L195 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] [2023-11-06 23:03:04,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 23:03:04,560 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:04,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1957401555, now seen corresponding path program 1 times [2023-11-06 23:03:04,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:04,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916363713] [2023-11-06 23:03:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:04,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:04,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:04,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:04,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916363713] [2023-11-06 23:03:04,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916363713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:04,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:04,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:03:04,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584168438] [2023-11-06 23:03:04,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:04,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:03:04,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:04,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:03:04,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:04,740 INFO L87 Difference]: Start difference. First operand 174 states and 189 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) 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) [2023-11-06 23:03:05,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:05,182 INFO L93 Difference]: Finished difference Result 174 states and 189 transitions. [2023-11-06 23:03:05,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:03:05,182 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) 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 [2023-11-06 23:03:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:05,184 INFO L225 Difference]: With dead ends: 174 [2023-11-06 23:03:05,184 INFO L226 Difference]: Without dead ends: 174 [2023-11-06 23:03:05,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 23:03:05,185 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 12 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:05,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 659 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:03:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-11-06 23:03:05,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2023-11-06 23:03:05,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 95 states have (on average 1.894736842105263) internal successors, (180), 167 states have internal predecessors, (180), 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) [2023-11-06 23:03:05,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 188 transitions. [2023-11-06 23:03:05,191 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 188 transitions. Word has length 30 [2023-11-06 23:03:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:05,192 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 188 transitions. [2023-11-06 23:03:05,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.4285714285714284) 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) [2023-11-06 23:03:05,192 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 188 transitions. [2023-11-06 23:03:05,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-06 23:03:05,193 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:05,193 INFO L195 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] [2023-11-06 23:03:05,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-06 23:03:05,193 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:05,194 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1957401556, now seen corresponding path program 1 times [2023-11-06 23:03:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107237233] [2023-11-06 23:03:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:05,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:05,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:05,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:05,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:05,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:05,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:05,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107237233] [2023-11-06 23:03:05,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107237233] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:05,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:05,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:03:05,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456829265] [2023-11-06 23:03:05,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:05,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:03:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:05,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:03:05,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:05,611 INFO L87 Difference]: Start difference. First operand 173 states and 188 transitions. Second operand has 8 states, 7 states have (on average 3.7142857142857144) 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) [2023-11-06 23:03:06,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:06,080 INFO L93 Difference]: Finished difference Result 172 states and 187 transitions. [2023-11-06 23:03:06,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:03:06,081 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.7142857142857144) 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 [2023-11-06 23:03:06,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:06,083 INFO L225 Difference]: With dead ends: 172 [2023-11-06 23:03:06,083 INFO L226 Difference]: Without dead ends: 172 [2023-11-06 23:03:06,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:03:06,084 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 10 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:06,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 689 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 23:03:06,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2023-11-06 23:03:06,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2023-11-06 23:03:06,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 95 states have (on average 1.8842105263157896) internal successors, (179), 166 states have internal predecessors, (179), 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) [2023-11-06 23:03:06,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 187 transitions. [2023-11-06 23:03:06,090 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 187 transitions. Word has length 30 [2023-11-06 23:03:06,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:06,090 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 187 transitions. [2023-11-06 23:03:06,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.7142857142857144) 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) [2023-11-06 23:03:06,091 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 187 transitions. [2023-11-06 23:03:06,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-06 23:03:06,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:06,092 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:06,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-06 23:03:06,092 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:06,093 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1237571266, now seen corresponding path program 1 times [2023-11-06 23:03:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:06,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083231308] [2023-11-06 23:03:06,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:06,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:06,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:06,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2023-11-06 23:03:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:06,263 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-06 23:03:06,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:06,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083231308] [2023-11-06 23:03:06,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083231308] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:06,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536169174] [2023-11-06 23:03:06,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:06,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:06,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:06,265 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:06,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:03:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:06,530 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-06 23:03:06,537 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:06,570 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-06 23:03:06,571 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:06,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536169174] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:06,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:06,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2023-11-06 23:03:06,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124732131] [2023-11-06 23:03:06,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:06,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:06,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:06,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:06,574 INFO L87 Difference]: Start difference. First operand 172 states and 187 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) [2023-11-06 23:03:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:06,589 INFO L93 Difference]: Finished difference Result 160 states and 171 transitions. [2023-11-06 23:03:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:06,590 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 [2023-11-06 23:03:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:06,591 INFO L225 Difference]: With dead ends: 160 [2023-11-06 23:03:06,592 INFO L226 Difference]: Without dead ends: 160 [2023-11-06 23:03:06,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:06,593 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 8 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:06,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 329 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:03:06,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-06 23:03:06,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-11-06 23:03:06,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 88 states have (on average 1.875) internal successors, (165), 155 states have internal predecessors, (165), 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) [2023-11-06 23:03:06,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 171 transitions. [2023-11-06 23:03:06,599 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 171 transitions. Word has length 41 [2023-11-06 23:03:06,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:06,600 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 171 transitions. [2023-11-06 23:03:06,600 INFO L496 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) [2023-11-06 23:03:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 171 transitions. [2023-11-06 23:03:06,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 23:03:06,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:06,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:06,614 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:06,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 23:03:06,815 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:06,815 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1387595362, now seen corresponding path program 1 times [2023-11-06 23:03:06,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:06,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378824324] [2023-11-06 23:03:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:06,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:07,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:07,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:07,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-06 23:03:07,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378824324] [2023-11-06 23:03:07,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378824324] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:07,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136351132] [2023-11-06 23:03:07,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:07,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:07,430 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:07,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:03:07,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:07,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-06 23:03:07,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:07,688 INFO L351 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 [2023-11-06 23:03:07,698 INFO L351 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 [2023-11-06 23:03:07,718 WARN L861 $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 [2023-11-06 23:03:07,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:07,765 INFO L351 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 [2023-11-06 23:03:07,781 INFO L351 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 [2023-11-06 23:03:07,788 WARN L861 $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 [2023-11-06 23:03:07,815 INFO L322 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-06 23:03:07,815 INFO L351 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 [2023-11-06 23:03:07,886 INFO L351 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 [2023-11-06 23:03:07,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:07,938 INFO L351 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 [2023-11-06 23:03:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 14 not checked. [2023-11-06 23:03:07,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:08,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136351132] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:08,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:08,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-11-06 23:03:08,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679189266] [2023-11-06 23:03:08,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:08,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 23:03:08,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:08,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 23:03:08,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=124, Unknown=2, NotChecked=46, Total=210 [2023-11-06 23:03:08,009 INFO L87 Difference]: Start difference. First operand 160 states and 171 transitions. Second operand has 14 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:03:08,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:08,531 INFO L93 Difference]: Finished difference Result 167 states and 179 transitions. [2023-11-06 23:03:08,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:08,532 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2023-11-06 23:03:08,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:08,533 INFO L225 Difference]: With dead ends: 167 [2023-11-06 23:03:08,533 INFO L226 Difference]: Without dead ends: 167 [2023-11-06 23:03:08,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=165, Unknown=2, NotChecked=54, Total=272 [2023-11-06 23:03:08,534 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 253 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 344 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:08,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 357 Invalid, 789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 433 Invalid, 0 Unknown, 344 Unchecked, 0.5s Time] [2023-11-06 23:03:08,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2023-11-06 23:03:08,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 149. [2023-11-06 23:03:08,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 88 states have (on average 1.75) internal successors, (154), 144 states have internal predecessors, (154), 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) [2023-11-06 23:03:08,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 160 transitions. [2023-11-06 23:03:08,541 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 160 transitions. Word has length 43 [2023-11-06 23:03:08,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:08,541 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 160 transitions. [2023-11-06 23:03:08,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 4.5) internal successors, (54), 12 states have internal predecessors, (54), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-11-06 23:03:08,542 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 160 transitions. [2023-11-06 23:03:08,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-06 23:03:08,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:08,542 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:03:08,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:08,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 23:03:08,743 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:08,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1387595361, now seen corresponding path program 1 times [2023-11-06 23:03:08,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:08,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979218494] [2023-11-06 23:03:08,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:08,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:09,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:09,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:09,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-06 23:03:09,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:09,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979218494] [2023-11-06 23:03:09,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979218494] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:09,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949703475] [2023-11-06 23:03:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:09,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:09,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:09,752 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:09,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:03:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:10,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-06 23:03:10,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:10,025 INFO L351 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 [2023-11-06 23:03:10,041 INFO L351 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 [2023-11-06 23:03:10,062 WARN L861 $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 [2023-11-06 23:03:10,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:10,116 INFO L351 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 [2023-11-06 23:03:10,139 INFO L351 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 [2023-11-06 23:03:10,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:10,192 INFO L351 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 [2023-11-06 23:03:10,265 INFO L351 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 [2023-11-06 23:03:10,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:10,316 INFO L351 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 [2023-11-06 23:03:10,338 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:03:10,338 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:03:10,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949703475] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:10,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:03:10,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 12 [2023-11-06 23:03:10,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163878957] [2023-11-06 23:03:10,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:10,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:10,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:10,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:10,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=103, Unknown=1, NotChecked=20, Total=156 [2023-11-06 23:03:10,341 INFO L87 Difference]: Start difference. First operand 149 states and 160 transitions. Second operand has 7 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:10,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:10,574 INFO L93 Difference]: Finished difference Result 142 states and 153 transitions. [2023-11-06 23:03:10,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:10,574 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2023-11-06 23:03:10,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:10,576 INFO L225 Difference]: With dead ends: 142 [2023-11-06 23:03:10,576 INFO L226 Difference]: Without dead ends: 142 [2023-11-06 23:03:10,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2023-11-06 23:03:10,577 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 53 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:10,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 339 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 223 Invalid, 0 Unknown, 185 Unchecked, 0.2s Time] [2023-11-06 23:03:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-06 23:03:10,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2023-11-06 23:03:10,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 88 states have (on average 1.6704545454545454) internal successors, (147), 137 states have internal predecessors, (147), 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) [2023-11-06 23:03:10,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 153 transitions. [2023-11-06 23:03:10,581 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 153 transitions. Word has length 43 [2023-11-06 23:03:10,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:10,582 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 153 transitions. [2023-11-06 23:03:10,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.6) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:10,582 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 153 transitions. [2023-11-06 23:03:10,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 23:03:10,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:10,583 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:10,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:10,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 23:03:10,790 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:10,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:10,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1206810835, now seen corresponding path program 1 times [2023-11-06 23:03:10,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:10,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075937619] [2023-11-06 23:03:10,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:10,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:11,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:11,739 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-06 23:03:11,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:11,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075937619] [2023-11-06 23:03:11,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075937619] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:11,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125224656] [2023-11-06 23:03:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:11,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:11,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:11,744 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:11,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:03:12,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:12,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-06 23:03:12,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:12,069 INFO L351 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 [2023-11-06 23:03:12,326 INFO L351 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 9 treesize of output 5 [2023-11-06 23:03:12,418 WARN L861 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-06 23:03:12,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:12,455 INFO L351 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 18 treesize of output 13 [2023-11-06 23:03:12,473 INFO L322 Elim1Store]: treesize reduction 32, result has 36.0 percent of original size [2023-11-06 23:03:12,473 INFO L351 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 23 treesize of output 24 [2023-11-06 23:03:12,512 INFO L351 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 [2023-11-06 23:03:12,518 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-06 23:03:12,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125224656] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:12,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:12,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2023-11-06 23:03:12,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97874058] [2023-11-06 23:03:12,667 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:12,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-06 23:03:12,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:12,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-06 23:03:12,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=572, Unknown=1, NotChecked=48, Total=702 [2023-11-06 23:03:12,668 INFO L87 Difference]: Start difference. First operand 142 states and 153 transitions. Second operand has 26 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 23:03:13,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:13,928 INFO L93 Difference]: Finished difference Result 207 states and 222 transitions. [2023-11-06 23:03:13,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:03:13,929 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-11-06 23:03:13,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:13,931 INFO L225 Difference]: With dead ends: 207 [2023-11-06 23:03:13,931 INFO L226 Difference]: Without dead ends: 207 [2023-11-06 23:03:13,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=1032, Unknown=1, NotChecked=66, Total=1260 [2023-11-06 23:03:13,932 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 387 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 219 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:13,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [387 Valid, 891 Invalid, 1428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1190 Invalid, 0 Unknown, 219 Unchecked, 1.0s Time] [2023-11-06 23:03:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-06 23:03:13,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 149. [2023-11-06 23:03:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.7263157894736842) internal successors, (164), 144 states have internal predecessors, (164), 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) [2023-11-06 23:03:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2023-11-06 23:03:13,939 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 46 [2023-11-06 23:03:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:13,940 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2023-11-06 23:03:13,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.652173913043478) internal successors, (61), 22 states have internal predecessors, (61), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 23:03:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2023-11-06 23:03:13,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-06 23:03:13,941 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:13,941 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:13,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:14,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:14,148 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:14,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:14,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1206810836, now seen corresponding path program 1 times [2023-11-06 23:03:14,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:14,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843145805] [2023-11-06 23:03:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:14,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:15,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:15,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:15,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,258 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:16,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:16,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843145805] [2023-11-06 23:03:16,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843145805] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:16,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509057169] [2023-11-06 23:03:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:16,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:16,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:16,264 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:16,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:03:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:16,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-06 23:03:16,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:16,658 INFO L351 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 [2023-11-06 23:03:17,234 INFO L351 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 17 [2023-11-06 23:03:17,243 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-11-06 23:03:17,386 WARN L861 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-06 23:03:17,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:17,441 INFO L351 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 33 treesize of output 26 [2023-11-06 23:03:17,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:17,449 INFO L351 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 24 treesize of output 19 [2023-11-06 23:03:17,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:17,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2023-11-06 23:03:17,466 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 23:03:17,467 INFO L351 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 15 treesize of output 15 [2023-11-06 23:03:17,538 INFO L351 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 23 treesize of output 15 [2023-11-06 23:03:17,541 INFO L351 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 14 [2023-11-06 23:03:17,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 3 not checked. [2023-11-06 23:03:17,639 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:18,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509057169] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:18,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:18,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 31 [2023-11-06 23:03:18,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135768454] [2023-11-06 23:03:18,080 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:18,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-06 23:03:18,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:18,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-06 23:03:18,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1086, Unknown=1, NotChecked=66, Total=1260 [2023-11-06 23:03:18,083 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 32 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 23:03:20,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:20,733 INFO L93 Difference]: Finished difference Result 186 states and 200 transitions. [2023-11-06 23:03:20,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-06 23:03:20,734 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 46 [2023-11-06 23:03:20,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:20,735 INFO L225 Difference]: With dead ends: 186 [2023-11-06 23:03:20,736 INFO L226 Difference]: Without dead ends: 186 [2023-11-06 23:03:20,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=213, Invalid=1952, Unknown=1, NotChecked=90, Total=2256 [2023-11-06 23:03:20,737 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 515 mSDsluCounter, 1142 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 197 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:20,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 1235 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 1965 Invalid, 0 Unknown, 197 Unchecked, 1.9s Time] [2023-11-06 23:03:20,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2023-11-06 23:03:20,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2023-11-06 23:03:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 95 states have (on average 1.7052631578947368) internal successors, (162), 144 states have internal predecessors, (162), 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) [2023-11-06 23:03:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 168 transitions. [2023-11-06 23:03:20,743 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 168 transitions. Word has length 46 [2023-11-06 23:03:20,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:20,744 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 168 transitions. [2023-11-06 23:03:20,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 2.413793103448276) internal successors, (70), 28 states have internal predecessors, (70), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-06 23:03:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 168 transitions. [2023-11-06 23:03:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-06 23:03:20,745 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:20,745 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:20,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:20,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 23:03:20,952 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:20,953 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:20,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1243571386, now seen corresponding path program 1 times [2023-11-06 23:03:20,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:20,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128209810] [2023-11-06 23:03:20,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:20,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:20,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:21,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:21,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,079 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:03:21,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:21,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128209810] [2023-11-06 23:03:21,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128209810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:21,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:21,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:21,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550432689] [2023-11-06 23:03:21,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:21,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:03:21,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:21,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:03:21,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:21,084 INFO L87 Difference]: Start difference. First operand 149 states and 168 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:21,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:21,226 INFO L93 Difference]: Finished difference Result 146 states and 158 transitions. [2023-11-06 23:03:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:03:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2023-11-06 23:03:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:21,228 INFO L225 Difference]: With dead ends: 146 [2023-11-06 23:03:21,228 INFO L226 Difference]: Without dead ends: 146 [2023-11-06 23:03:21,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:03:21,229 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 31 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:21,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 321 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:21,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2023-11-06 23:03:21,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2023-11-06 23:03:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 91 states have (on average 1.6593406593406594) internal successors, (151), 140 states have internal predecessors, (151), 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) [2023-11-06 23:03:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 157 transitions. [2023-11-06 23:03:21,234 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 157 transitions. Word has length 47 [2023-11-06 23:03:21,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:21,234 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 157 transitions. [2023-11-06 23:03:21,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:21,234 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 157 transitions. [2023-11-06 23:03:21,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 23:03:21,235 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:21,237 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:21,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-06 23:03:21,238 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr38REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:21,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:21,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1070760409, now seen corresponding path program 1 times [2023-11-06 23:03:21,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:21,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977975675] [2023-11-06 23:03:21,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:21,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-06 23:03:21,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:21,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977975675] [2023-11-06 23:03:21,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977975675] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:21,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:21,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:03:21,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990213084] [2023-11-06 23:03:21,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:21,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:21,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:21,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:21,451 INFO L87 Difference]: Start difference. First operand 145 states and 157 transitions. Second operand has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:21,788 INFO L93 Difference]: Finished difference Result 139 states and 151 transitions. [2023-11-06 23:03:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2023-11-06 23:03:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:21,790 INFO L225 Difference]: With dead ends: 139 [2023-11-06 23:03:21,790 INFO L226 Difference]: Without dead ends: 139 [2023-11-06 23:03:21,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:21,791 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 43 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:21,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 447 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:03:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-06 23:03:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2023-11-06 23:03:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 91 states have (on average 1.5934065934065933) internal successors, (145), 134 states have internal predecessors, (145), 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) [2023-11-06 23:03:21,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2023-11-06 23:03:21,795 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 49 [2023-11-06 23:03:21,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:21,796 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2023-11-06 23:03:21,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.666666666666667) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:21,796 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2023-11-06 23:03:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 23:03:21,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:21,797 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-06 23:03:21,797 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr39REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:21,797 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1070760408, now seen corresponding path program 1 times [2023-11-06 23:03:21,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:21,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844925076] [2023-11-06 23:03:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:21,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:21,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:21,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:22,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:22,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:03:22,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:22,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844925076] [2023-11-06 23:03:22,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844925076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:22,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:22,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 23:03:22,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124757778] [2023-11-06 23:03:22,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:22,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:22,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:22,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:22,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:22,028 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:22,174 INFO L93 Difference]: Finished difference Result 138 states and 149 transitions. [2023-11-06 23:03:22,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:03:22,174 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-11-06 23:03:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:22,175 INFO L225 Difference]: With dead ends: 138 [2023-11-06 23:03:22,176 INFO L226 Difference]: Without dead ends: 138 [2023-11-06 23:03:22,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:22,176 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 126 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:22,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 340 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:22,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2023-11-06 23:03:22,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2023-11-06 23:03:22,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 90 states have (on average 1.5888888888888888) internal successors, (143), 133 states have internal predecessors, (143), 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) [2023-11-06 23:03:22,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2023-11-06 23:03:22,180 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 49 [2023-11-06 23:03:22,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:22,181 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2023-11-06 23:03:22,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:22,181 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2023-11-06 23:03:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-06 23:03:22,181 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:22,181 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:22,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-06 23:03:22,182 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:22,182 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:22,182 INFO L85 PathProgramCache]: Analyzing trace with hash -1069620661, now seen corresponding path program 1 times [2023-11-06 23:03:22,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:22,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131051453] [2023-11-06 23:03:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:22,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:22,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:22,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,443 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:03:22,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:22,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131051453] [2023-11-06 23:03:22,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131051453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:22,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:22,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:03:22,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722159701] [2023-11-06 23:03:22,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:22,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 23:03:22,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:22,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 23:03:22,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:22,446 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:22,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:22,601 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2023-11-06 23:03:22,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:22,601 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2023-11-06 23:03:22,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:22,602 INFO L225 Difference]: With dead ends: 135 [2023-11-06 23:03:22,602 INFO L226 Difference]: Without dead ends: 135 [2023-11-06 23:03:22,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:22,603 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 197 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:22,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 302 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:03:22,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-06 23:03:22,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2023-11-06 23:03:22,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 89 states have (on average 1.5617977528089888) internal successors, (139), 130 states have internal predecessors, (139), 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) [2023-11-06 23:03:22,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 145 transitions. [2023-11-06 23:03:22,609 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 145 transitions. Word has length 49 [2023-11-06 23:03:22,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:22,609 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 145 transitions. [2023-11-06 23:03:22,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 145 transitions. [2023-11-06 23:03:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 23:03:22,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:22,610 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:22,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-06 23:03:22,611 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:22,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:22,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1201496270, now seen corresponding path program 1 times [2023-11-06 23:03:22,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:22,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296879712] [2023-11-06 23:03:22,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:22,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:22,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:22,759 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:03:22,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:22,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296879712] [2023-11-06 23:03:22,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296879712] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:22,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:22,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:22,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612697137] [2023-11-06 23:03:22,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:22,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:22,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:22,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:22,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:22,762 INFO L87 Difference]: Start difference. First operand 135 states and 145 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:22,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:22,960 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2023-11-06 23:03:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-11-06 23:03:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:22,963 INFO L225 Difference]: With dead ends: 135 [2023-11-06 23:03:22,963 INFO L226 Difference]: Without dead ends: 135 [2023-11-06 23:03:22,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:22,964 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 37 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:22,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 319 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:22,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-06 23:03:22,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2023-11-06 23:03:22,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 89 states have (on average 1.550561797752809) internal successors, (138), 129 states have internal predecessors, (138), 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) [2023-11-06 23:03:22,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 144 transitions. [2023-11-06 23:03:22,968 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 144 transitions. Word has length 50 [2023-11-06 23:03:22,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:22,968 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 144 transitions. [2023-11-06 23:03:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:22,969 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 144 transitions. [2023-11-06 23:03:22,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-06 23:03:22,969 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:22,969 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:22,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-06 23:03:22,969 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:22,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:22,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1201496271, now seen corresponding path program 1 times [2023-11-06 23:03:22,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:22,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069494995] [2023-11-06 23:03:22,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:22,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:23,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:23,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:23,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:03:23,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:23,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069494995] [2023-11-06 23:03:23,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069494995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:23,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:23,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:03:23,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985073881] [2023-11-06 23:03:23,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:23,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 23:03:23,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 23:03:23,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:03:23,181 INFO L87 Difference]: Start difference. First operand 134 states and 144 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:23,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:23,425 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2023-11-06 23:03:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 23:03:23,425 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 50 [2023-11-06 23:03:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:23,427 INFO L225 Difference]: With dead ends: 133 [2023-11-06 23:03:23,427 INFO L226 Difference]: Without dead ends: 133 [2023-11-06 23:03:23,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-06 23:03:23,428 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 36 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:23,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 311 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:23,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-06 23:03:23,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2023-11-06 23:03:23,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 89 states have (on average 1.5393258426966292) internal successors, (137), 128 states have internal predecessors, (137), 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) [2023-11-06 23:03:23,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 143 transitions. [2023-11-06 23:03:23,434 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 143 transitions. Word has length 50 [2023-11-06 23:03:23,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:23,434 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 143 transitions. [2023-11-06 23:03:23,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:23,435 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 143 transitions. [2023-11-06 23:03:23,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-06 23:03:23,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:23,436 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:23,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2023-11-06 23:03:23,436 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:23,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:23,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1408321254, now seen corresponding path program 1 times [2023-11-06 23:03:23,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:23,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806147979] [2023-11-06 23:03:23,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:23,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:23,802 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:03:23,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:23,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806147979] [2023-11-06 23:03:23,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806147979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:23,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:23,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:03:23,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420561865] [2023-11-06 23:03:23,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:23,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:23,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:23,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:23,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:23,805 INFO L87 Difference]: Start difference. First operand 133 states and 143 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:24,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:24,138 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2023-11-06 23:03:24,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:24,139 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2023-11-06 23:03:24,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:24,140 INFO L225 Difference]: With dead ends: 127 [2023-11-06 23:03:24,140 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 23:03:24,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:24,141 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 30 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:24,142 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 447 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-06 23:03:24,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 23:03:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-06 23:03:24,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 89 states have (on average 1.4719101123595506) internal successors, (131), 122 states have internal predecessors, (131), 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) [2023-11-06 23:03:24,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2023-11-06 23:03:24,146 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 51 [2023-11-06 23:03:24,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:24,147 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2023-11-06 23:03:24,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 5 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:03:24,147 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2023-11-06 23:03:24,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 23:03:24,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:24,148 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:24,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2023-11-06 23:03:24,148 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr18REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:24,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:24,149 INFO L85 PathProgramCache]: Analyzing trace with hash -482026468, now seen corresponding path program 1 times [2023-11-06 23:03:24,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:24,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488844414] [2023-11-06 23:03:24,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:24,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:25,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:25,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:25,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:27,184 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:27,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488844414] [2023-11-06 23:03:27,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488844414] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:27,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11330002] [2023-11-06 23:03:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:27,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:27,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:27,200 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:27,212 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:03:27,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:27,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 98 conjunts are in the unsatisfiable core [2023-11-06 23:03:27,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:27,643 INFO L351 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 [2023-11-06 23:03:28,011 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:03:28,012 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:03:28,176 INFO L351 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 [2023-11-06 23:03:28,322 INFO L351 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 [2023-11-06 23:03:28,528 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:03:28,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-11-06 23:03:28,622 INFO L351 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 33 treesize of output 17 [2023-11-06 23:03:28,829 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:03:28,830 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 22 [2023-11-06 23:03:28,839 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 11 treesize of output 7 [2023-11-06 23:03:28,855 INFO L351 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 [2023-11-06 23:03:29,100 WARN L861 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1)))) is different from true [2023-11-06 23:03:29,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:29,167 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:03:29,167 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 38 [2023-11-06 23:03:29,206 INFO L322 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-11-06 23:03:29,206 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 34 treesize of output 57 [2023-11-06 23:03:29,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:29,217 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-11-06 23:03:29,372 INFO L351 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 [2023-11-06 23:03:29,761 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:03:29,762 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 33 [2023-11-06 23:03:30,063 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-11-06 23:03:30,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:30,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11330002] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:30,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:30,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 49 [2023-11-06 23:03:30,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932669261] [2023-11-06 23:03:30,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:30,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-06 23:03:30,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:30,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-06 23:03:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2266, Unknown=1, NotChecked=96, Total=2550 [2023-11-06 23:03:30,328 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 50 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 43 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 23:03:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:33,408 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2023-11-06 23:03:33,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-06 23:03:33,409 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 43 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2023-11-06 23:03:33,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:33,410 INFO L225 Difference]: With dead ends: 127 [2023-11-06 23:03:33,410 INFO L226 Difference]: Without dead ends: 127 [2023-11-06 23:03:33,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=358, Invalid=3551, Unknown=1, NotChecked=122, Total=4032 [2023-11-06 23:03:33,412 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 224 mSDsluCounter, 1543 mSDsCounter, 0 mSdLazyCounter, 2245 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 134 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:33,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 1623 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2245 Invalid, 0 Unknown, 134 Unchecked, 2.0s Time] [2023-11-06 23:03:33,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-06 23:03:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2023-11-06 23:03:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 89 states have (on average 1.4606741573033708) internal successors, (130), 121 states have internal predecessors, (130), 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) [2023-11-06 23:03:33,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2023-11-06 23:03:33,417 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 53 [2023-11-06 23:03:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:33,418 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2023-11-06 23:03:33,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.9777777777777779) internal successors, (89), 43 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 23:03:33,418 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2023-11-06 23:03:33,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-06 23:03:33,419 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:33,419 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:33,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:33,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-06 23:03:33,627 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr19REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:33,627 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:33,628 INFO L85 PathProgramCache]: Analyzing trace with hash -482026467, now seen corresponding path program 1 times [2023-11-06 23:03:33,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:33,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483190780] [2023-11-06 23:03:33,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:33,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:35,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:35,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:35,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:35,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:37,366 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:37,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:37,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483190780] [2023-11-06 23:03:37,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483190780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:37,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971524031] [2023-11-06 23:03:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:37,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:37,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:37,368 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:37,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:03:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:37,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 120 conjunts are in the unsatisfiable core [2023-11-06 23:03:37,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:37,787 INFO L351 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 [2023-11-06 23:03:38,363 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:03:38,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:03:38,383 INFO L351 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 [2023-11-06 23:03:38,661 INFO L351 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 [2023-11-06 23:03:38,679 INFO L351 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 [2023-11-06 23:03:38,859 INFO L351 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 [2023-11-06 23:03:38,885 INFO L351 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 [2023-11-06 23:03:39,201 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:03:39,201 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2023-11-06 23:03:39,213 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 23:03:39,333 INFO L351 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 42 treesize of output 22 [2023-11-06 23:03:39,344 INFO L351 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 18 [2023-11-06 23:03:39,719 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:03:39,719 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 41 [2023-11-06 23:03:39,729 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-06 23:03:39,876 WARN L861 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$.offset| (store |c_old(#memory_$Pointer$.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.offset| |node_create_~temp~0#1.base|))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$.base| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2023-11-06 23:03:39,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:39,949 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:03:39,949 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 63 [2023-11-06 23:03:39,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:39,959 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:39,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:39,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-11-06 23:03:39,986 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 23:03:39,987 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 30 [2023-11-06 23:03:39,992 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2023-11-06 23:03:40,390 INFO L322 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-06 23:03:40,390 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 34 [2023-11-06 23:03:40,397 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-06 23:03:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2023-11-06 23:03:40,543 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:41,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971524031] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:41,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:03:41,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 53 [2023-11-06 23:03:41,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230787773] [2023-11-06 23:03:41,282 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:03:41,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2023-11-06 23:03:41,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:41,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2023-11-06 23:03:41,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3235, Unknown=1, NotChecked=114, Total=3540 [2023-11-06 23:03:41,285 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 54 states, 49 states have (on average 1.836734693877551) internal successors, (90), 47 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 23:03:46,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:46,320 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2023-11-06 23:03:46,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-06 23:03:46,321 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 49 states have (on average 1.836734693877551) internal successors, (90), 47 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 53 [2023-11-06 23:03:46,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:46,322 INFO L225 Difference]: With dead ends: 125 [2023-11-06 23:03:46,322 INFO L226 Difference]: Without dead ends: 125 [2023-11-06 23:03:46,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1373 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=407, Invalid=5448, Unknown=1, NotChecked=150, Total=6006 [2023-11-06 23:03:46,325 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 306 mSDsluCounter, 1922 mSDsCounter, 0 mSdLazyCounter, 3161 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 2002 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 3161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:46,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 2002 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 3161 Invalid, 0 Unknown, 132 Unchecked, 2.9s Time] [2023-11-06 23:03:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-06 23:03:46,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-06 23:03:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 89 states have (on average 1.449438202247191) internal successors, (129), 120 states have internal predecessors, (129), 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) [2023-11-06 23:03:46,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2023-11-06 23:03:46,330 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 53 [2023-11-06 23:03:46,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:46,330 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2023-11-06 23:03:46,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 49 states have (on average 1.836734693877551) internal successors, (90), 47 states have internal predecessors, (90), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 23:03:46,331 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2023-11-06 23:03:46,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-06 23:03:46,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:46,331 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:46,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:03:46,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:46,539 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr45REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:46,540 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:46,540 INFO L85 PathProgramCache]: Analyzing trace with hash 629035326, now seen corresponding path program 1 times [2023-11-06 23:03:46,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:46,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196290753] [2023-11-06 23:03:46,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:46,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:46,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:46,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-11-06 23:03:46,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:46,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196290753] [2023-11-06 23:03:46,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196290753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:03:46,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:03:46,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-06 23:03:46,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124759624] [2023-11-06 23:03:46,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:03:46,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:03:46,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:03:46,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:03:46,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:03:46,906 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 7 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:47,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:03:47,097 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2023-11-06 23:03:47,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:03:47,097 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2023-11-06 23:03:47,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:03:47,099 INFO L225 Difference]: With dead ends: 121 [2023-11-06 23:03:47,099 INFO L226 Difference]: Without dead ends: 121 [2023-11-06 23:03:47,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:03:47,099 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 247 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:03:47,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [248 Valid, 221 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:03:47,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-06 23:03:47,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2023-11-06 23:03:47,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.404494382022472) internal successors, (125), 116 states have internal predecessors, (125), 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) [2023-11-06 23:03:47,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2023-11-06 23:03:47,104 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 55 [2023-11-06 23:03:47,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:03:47,104 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2023-11-06 23:03:47,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 7.0) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:03:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2023-11-06 23:03:47,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 23:03:47,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:03:47,105 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:03:47,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2023-11-06 23:03:47,106 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:03:47,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:03:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1087438175, now seen corresponding path program 1 times [2023-11-06 23:03:47,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:03:47,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847542003] [2023-11-06 23:03:47,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:47,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:03:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:49,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:03:49,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:49,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:03:49,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:49,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:03:49,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:50,886 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:03:50,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:03:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847542003] [2023-11-06 23:03:50,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847542003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:03:50,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444849872] [2023-11-06 23:03:50,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:03:50,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:03:50,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:03:50,888 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:03:50,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:03:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:03:51,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 117 conjunts are in the unsatisfiable core [2023-11-06 23:03:51,312 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:03:51,320 INFO L351 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 [2023-11-06 23:03:51,327 INFO L351 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 [2023-11-06 23:03:51,565 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:03:51,565 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:03:51,796 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:03:52,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:52,049 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:03:52,049 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 29 [2023-11-06 23:03:52,313 INFO L351 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:03:52,506 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:03:52,506 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 44 [2023-11-06 23:03:52,809 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:03:52,812 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-11-06 23:03:52,943 INFO L351 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 41 treesize of output 21 [2023-11-06 23:03:53,281 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:03:53,281 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 27 [2023-11-06 23:03:53,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:53,290 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-06 23:03:53,296 INFO L351 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 [2023-11-06 23:03:53,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:53,561 INFO L351 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 [2023-11-06 23:03:53,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:53,586 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:03:53,586 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 51 [2023-11-06 23:03:53,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:53,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:53,619 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 23:03:53,620 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-11-06 23:03:53,938 INFO L351 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 [2023-11-06 23:03:54,832 INFO L322 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-11-06 23:03:54,832 INFO L351 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 65 [2023-11-06 23:03:54,840 INFO L351 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 28 treesize of output 20 [2023-11-06 23:03:54,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:54,972 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2023-11-06 23:03:55,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:03:55,004 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2023-11-06 23:03:55,108 INFO L351 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 35 treesize of output 26 [2023-11-06 23:03:55,200 INFO L351 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 14 [2023-11-06 23:03:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:03:55,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:03:55,222 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4410 (Array Int Int))) (= (select |c_#valid| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4410) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2023-11-06 23:04:03,800 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4410 (Array Int Int)) (v_ArrVal_4407 (Array Int Int)) (v_ArrVal_4409 (Array Int Int))) (= (select |c_#valid| (select (select (store (store (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~snd_to_last~0#1.base| v_ArrVal_4407) |c_ULTIMATE.start_dll_circular_insert_~new_node~0#1.base| v_ArrVal_4409) |c_ULTIMATE.start_dll_circular_insert_#t~mem11#1.base| v_ArrVal_4410) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) 1)) is different from false [2023-11-06 23:04:03,814 INFO L322 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2023-11-06 23:04:03,814 INFO L351 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 29 treesize of output 28 [2023-11-06 23:04:10,715 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4410 (Array Int Int)) (v_ArrVal_4407 (Array Int Int)) (v_ArrVal_4409 (Array Int Int))) (let ((.cse0 (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (= .cse0 (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_4407) |c_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base| v_ArrVal_4409) (select (select |c_#memory_$Pointer$.base| .cse0) (select (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) v_ArrVal_4410) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) is different from false [2023-11-06 23:04:10,834 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_4420 (Array Int Int)) (v_ArrVal_4410 (Array Int Int)) (|v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_20| Int) (v_ArrVal_4407 (Array Int Int)) (v_ArrVal_4419 (Array Int Int)) (v_ArrVal_4409 (Array Int Int))) (or (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_20| 1)) (let ((.cse1 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_20| v_ArrVal_4420))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (= (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_4407) |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_20| v_ArrVal_4409) (select (select .cse1 .cse0) (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_20| v_ArrVal_4419) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) v_ArrVal_4410) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) .cse0))) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_20|) 0)))) is different from false [2023-11-06 23:04:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444849872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:10,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:10,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 61 [2023-11-06 23:04:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919234491] [2023-11-06 23:04:10,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:10,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-06 23:04:10,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-06 23:04:10,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4229, Unknown=100, NotChecked=540, Total=5112 [2023-11-06 23:04:10,842 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand has 62 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 53 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:04:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:17,327 INFO L93 Difference]: Finished difference Result 267 states and 289 transitions. [2023-11-06 23:04:17,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-06 23:04:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 53 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2023-11-06 23:04:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:17,329 INFO L225 Difference]: With dead ends: 267 [2023-11-06 23:04:17,330 INFO L226 Difference]: Without dead ends: 267 [2023-11-06 23:04:17,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1645 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=558, Invalid=7188, Unknown=102, NotChecked=708, Total=8556 [2023-11-06 23:04:17,333 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 595 mSDsluCounter, 1920 mSDsCounter, 0 mSdLazyCounter, 3110 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:17,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [595 Valid, 1972 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3110 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-06 23:04:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-06 23:04:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 122. [2023-11-06 23:04:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 93 states have (on average 1.3655913978494623) internal successors, (127), 117 states have internal predecessors, (127), 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) [2023-11-06 23:04:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 133 transitions. [2023-11-06 23:04:17,339 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 133 transitions. Word has length 57 [2023-11-06 23:04:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:17,340 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 133 transitions. [2023-11-06 23:04:17,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.6206896551724137) internal successors, (94), 53 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:04:17,340 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 133 transitions. [2023-11-06 23:04:17,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-06 23:04:17,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:17,341 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:04:17,348 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:17,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:17,548 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:04:17,549 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:17,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1087438174, now seen corresponding path program 1 times [2023-11-06 23:04:17,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:17,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127325764] [2023-11-06 23:04:17,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:17,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:17,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:20,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:04:20,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:04:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:21,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:04:21,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:22,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:22,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127325764] [2023-11-06 23:04:22,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127325764] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:22,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467629250] [2023-11-06 23:04:22,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:22,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:22,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:22,566 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:22,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:04:23,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:23,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 128 conjunts are in the unsatisfiable core [2023-11-06 23:04:23,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:23,030 INFO L351 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 [2023-11-06 23:04:23,044 INFO L351 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 [2023-11-06 23:04:23,392 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:04:23,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:04:23,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:24,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:24,238 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:04:24,239 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 29 [2023-11-06 23:04:24,681 INFO L351 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:24,992 INFO L351 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 16 treesize of output 11 [2023-11-06 23:04:25,434 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:04:25,434 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 39 [2023-11-06 23:04:25,601 INFO L351 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 41 treesize of output 21 [2023-11-06 23:04:26,037 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:04:26,037 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 32 [2023-11-06 23:04:26,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:26,048 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-06 23:04:26,056 INFO L351 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 [2023-11-06 23:04:26,061 INFO L351 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 [2023-11-06 23:04:26,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:26,475 INFO L351 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 [2023-11-06 23:04:26,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:26,511 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:04:26,511 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 58 [2023-11-06 23:04:26,543 INFO L322 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2023-11-06 23:04:26,544 INFO L351 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 18 treesize of output 21 [2023-11-06 23:04:26,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:26,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:26,591 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 23:04:26,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-11-06 23:04:28,238 INFO L322 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-11-06 23:04:28,239 INFO L351 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 77 [2023-11-06 23:04:28,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:28,249 INFO L351 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 24 treesize of output 11 [2023-11-06 23:04:28,261 INFO L351 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 28 treesize of output 20 [2023-11-06 23:04:28,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:28,419 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2023-11-06 23:04:28,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:28,444 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-11-06 23:04:28,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:28,467 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2023-11-06 23:04:28,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:28,478 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-11-06 23:04:28,613 INFO L351 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 16 treesize of output 11 [2023-11-06 23:04:28,621 INFO L351 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 35 treesize of output 26 [2023-11-06 23:04:28,750 INFO L351 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 14 [2023-11-06 23:04:28,756 INFO L351 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 [2023-11-06 23:04:28,762 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:04:28,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:29,066 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_4722 (Array Int Int)) (v_ArrVal_4723 (Array Int Int))) (<= (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4722) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 12) (select |c_#length| (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4723) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)))) (forall ((v_ArrVal_4722 (Array Int Int))) (<= 0 (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_4722) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2023-11-06 23:04:35,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467629250] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:35,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:04:35,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 63 [2023-11-06 23:04:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159545800] [2023-11-06 23:04:35,192 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:35,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-06 23:04:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:35,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-06 23:04:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=5374, Unknown=11, NotChecked=148, Total=5852 [2023-11-06 23:04:35,197 INFO L87 Difference]: Start difference. First operand 122 states and 133 transitions. Second operand has 64 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 55 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:04:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:44,490 INFO L93 Difference]: Finished difference Result 279 states and 305 transitions. [2023-11-06 23:04:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:04:44,491 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 55 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 57 [2023-11-06 23:04:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:44,493 INFO L225 Difference]: With dead ends: 279 [2023-11-06 23:04:44,493 INFO L226 Difference]: Without dead ends: 279 [2023-11-06 23:04:44,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=657, Invalid=8266, Unknown=11, NotChecked=186, Total=9120 [2023-11-06 23:04:44,497 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 587 mSDsluCounter, 1703 mSDsCounter, 0 mSdLazyCounter, 3490 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 3490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:44,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1750 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 3490 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-06 23:04:44,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2023-11-06 23:04:44,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 124. [2023-11-06 23:04:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 95 states have (on average 1.3578947368421053) internal successors, (129), 119 states have internal predecessors, (129), 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) [2023-11-06 23:04:44,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 135 transitions. [2023-11-06 23:04:44,504 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 135 transitions. Word has length 57 [2023-11-06 23:04:44,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:44,504 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 135 transitions. [2023-11-06 23:04:44,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 60 states have (on average 1.5666666666666667) internal successors, (94), 55 states have internal predecessors, (94), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:04:44,505 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 135 transitions. [2023-11-06 23:04:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 23:04:44,506 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:44,506 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:04:44,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:44,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-06 23:04:44,714 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr46REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:04:44,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1420283880, now seen corresponding path program 1 times [2023-11-06 23:04:44,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:44,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069294756] [2023-11-06 23:04:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:44,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:45,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:04:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:04:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:45,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:04:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-06 23:04:45,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:45,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069294756] [2023-11-06 23:04:45,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069294756] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:45,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:45,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:04:45,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22104726] [2023-11-06 23:04:45,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:45,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:45,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:45,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:45,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:45,233 INFO L87 Difference]: Start difference. First operand 124 states and 135 transitions. Second operand has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:04:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:46,178 INFO L93 Difference]: Finished difference Result 189 states and 205 transitions. [2023-11-06 23:04:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-06 23:04:46,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 1 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 58 [2023-11-06 23:04:46,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:46,180 INFO L225 Difference]: With dead ends: 189 [2023-11-06 23:04:46,180 INFO L226 Difference]: Without dead ends: 189 [2023-11-06 23:04:46,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:46,181 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 109 mSDsluCounter, 740 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 872 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:46,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 872 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:04:46,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-06 23:04:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 125. [2023-11-06 23:04:46,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 120 states have internal predecessors, (131), 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) [2023-11-06 23:04:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2023-11-06 23:04:46,197 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 58 [2023-11-06 23:04:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:46,197 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2023-11-06 23:04:46,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:04:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2023-11-06 23:04:46,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-06 23:04:46,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:46,199 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:04:46,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2023-11-06 23:04:46,199 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr47REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:04:46,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:46,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1420283879, now seen corresponding path program 1 times [2023-11-06 23:04:46,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:46,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081525796] [2023-11-06 23:04:46,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:46,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:46,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:04:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:04:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:04:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 23:04:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:46,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081525796] [2023-11-06 23:04:46,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081525796] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:04:46,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:04:46,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-06 23:04:46,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218936266] [2023-11-06 23:04:46,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:04:46,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:46,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:46,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:46,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:46,891 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:04:47,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:47,838 INFO L93 Difference]: Finished difference Result 187 states and 205 transitions. [2023-11-06 23:04:47,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 23:04:47,844 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 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 58 [2023-11-06 23:04:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:47,845 INFO L225 Difference]: With dead ends: 187 [2023-11-06 23:04:47,846 INFO L226 Difference]: Without dead ends: 187 [2023-11-06 23:04:47,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:04:47,846 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 103 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:47,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 970 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:04:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-06 23:04:47,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 121. [2023-11-06 23:04:47,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 92 states have (on average 1.3695652173913044) internal successors, (126), 116 states have internal predecessors, (126), 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) [2023-11-06 23:04:47,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 132 transitions. [2023-11-06 23:04:47,851 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 132 transitions. Word has length 58 [2023-11-06 23:04:47,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:47,852 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 132 transitions. [2023-11-06 23:04:47,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 5.0) internal successors, (45), 9 states have internal predecessors, (45), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-06 23:04:47,852 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 132 transitions. [2023-11-06 23:04:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-06 23:04:47,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:47,853 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:04:47,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2023-11-06 23:04:47,853 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr32REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:04:47,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:47,854 INFO L85 PathProgramCache]: Analyzing trace with hash -914998605, now seen corresponding path program 1 times [2023-11-06 23:04:47,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:47,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130882975] [2023-11-06 23:04:47,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:47,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:48,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:04:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:48,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:04:48,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:48,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:04:48,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:48,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:04:48,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:48,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130882975] [2023-11-06 23:04:48,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130882975] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:48,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199212733] [2023-11-06 23:04:48,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:48,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:48,125 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:48,126 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:48,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:04:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:48,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-06 23:04:48,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:04:48,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:04:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:04:48,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199212733] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:04:48,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 23:04:48,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2023-11-06 23:04:48,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460431110] [2023-11-06 23:04:48,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 23:04:48,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-06 23:04:48,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:04:48,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-06 23:04:48,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:04:48,802 INFO L87 Difference]: Start difference. First operand 121 states and 132 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:04:49,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:04:49,108 INFO L93 Difference]: Finished difference Result 105 states and 115 transitions. [2023-11-06 23:04:49,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:04:49,109 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2023-11-06 23:04:49,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:04:49,110 INFO L225 Difference]: With dead ends: 105 [2023-11-06 23:04:49,110 INFO L226 Difference]: Without dead ends: 105 [2023-11-06 23:04:49,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 23:04:49,111 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 10 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:04:49,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 628 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:04:49,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-06 23:04:49,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2023-11-06 23:04:49,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.3625) internal successors, (109), 100 states have internal predecessors, (109), 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) [2023-11-06 23:04:49,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2023-11-06 23:04:49,115 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 59 [2023-11-06 23:04:49,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:04:49,115 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2023-11-06 23:04:49,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:04:49,116 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2023-11-06 23:04:49,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-06 23:04:49,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:04:49,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2023-11-06 23:04:49,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:04:49,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:49,317 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:04:49,317 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:04:49,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1259334324, now seen corresponding path program 1 times [2023-11-06 23:04:49,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:04:49,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137843626] [2023-11-06 23:04:49,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:49,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:04:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:54,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:04:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:54,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:04:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:55,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:04:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:04:56,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:04:56,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137843626] [2023-11-06 23:04:56,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137843626] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:04:56,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3518681] [2023-11-06 23:04:56,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:04:56,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:04:56,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:04:56,063 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:04:56,066 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:04:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:04:56,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 158 conjunts are in the unsatisfiable core [2023-11-06 23:04:56,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:04:56,540 INFO L351 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 [2023-11-06 23:04:56,655 INFO L351 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 [2023-11-06 23:04:56,893 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:04:56,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:04:57,208 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:57,381 INFO L351 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 [2023-11-06 23:04:57,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:57,677 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:04:57,677 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 29 [2023-11-06 23:04:58,093 INFO L351 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 [2023-11-06 23:04:58,130 INFO L351 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:04:58,412 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:04:58,413 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2023-11-06 23:04:58,436 INFO L351 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 24 treesize of output 11 [2023-11-06 23:04:58,965 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:04:58,965 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2023-11-06 23:04:58,979 INFO L351 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 24 treesize of output 11 [2023-11-06 23:04:59,219 INFO L351 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 41 treesize of output 21 [2023-11-06 23:04:59,239 INFO L351 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 [2023-11-06 23:04:59,806 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:04:59,806 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 34 [2023-11-06 23:04:59,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:04:59,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-06 23:04:59,823 INFO L351 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 [2023-11-06 23:04:59,828 INFO L351 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 [2023-11-06 23:05:00,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:00,538 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:05:00,538 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2023-11-06 23:05:00,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:00,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:00,576 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 23:05:00,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-11-06 23:05:00,599 INFO L351 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 20 treesize of output 15 [2023-11-06 23:05:00,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:00,613 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-11-06 23:05:02,589 INFO L322 Elim1Store]: treesize reduction 27, result has 15.6 percent of original size [2023-11-06 23:05:02,589 INFO L351 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 139 treesize of output 100 [2023-11-06 23:05:02,596 INFO L351 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 28 treesize of output 20 [2023-11-06 23:05:02,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 15 [2023-11-06 23:05:02,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:02,627 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 23:05:02,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:02,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 34 [2023-11-06 23:05:02,886 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-11-06 23:05:02,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:02,898 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-11-06 23:05:02,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:02,966 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 34 [2023-11-06 23:05:02,974 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-11-06 23:05:02,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:02,983 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-11-06 23:05:03,211 INFO L351 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 20 treesize of output 15 [2023-11-06 23:05:03,224 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2023-11-06 23:05:03,236 INFO L351 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 16 treesize of output 11 [2023-11-06 23:05:03,448 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2023-11-06 23:05:03,455 INFO L351 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 [2023-11-06 23:05:03,822 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:03,822 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:04,041 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_5633 (Array Int Int)) (v_ArrVal_5635 (Array Int Int)) (v_ArrVal_5634 (Array Int Int))) (= |c_ULTIMATE.start_main_~data~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_5634) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_5635) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_5633) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) is different from false [2023-11-06 23:05:06,753 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| Int) (v_ArrVal_5650 (Array Int Int)) (v_ArrVal_5631 (Array Int Int)) (v_ArrVal_5630 (Array Int Int)) (v_ArrVal_5633 (Array Int Int)) (v_ArrVal_5632 (Array Int Int)) (v_ArrVal_5624 (Array Int Int)) (v_ArrVal_5635 (Array Int Int)) (v_ArrVal_5634 (Array Int Int)) (v_ArrVal_5626 (Array Int Int)) (v_ArrVal_5648 (Array Int Int)) (v_ArrVal_5625 (Array Int Int)) (v_ArrVal_5649 (Array Int Int))) (let ((.cse2 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| v_ArrVal_5650))) (let ((.cse0 (select (select .cse2 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|)) (.cse3 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| v_ArrVal_5649) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (= |c_ULTIMATE.start_main_~data~0#1| (let ((.cse1 (select (select .cse2 .cse0) .cse3))) (select (select (store (store (store |c_#memory_int| .cse0 v_ArrVal_5625) |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| v_ArrVal_5630) .cse1 v_ArrVal_5634) (select (select (store (store (store |c_#memory_$Pointer$.base| .cse0 v_ArrVal_5624) |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| v_ArrVal_5631) .cse1 v_ArrVal_5635) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (+ (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse0 v_ArrVal_5626) |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| v_ArrVal_5632) .cse1 v_ArrVal_5633) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|) 8)))) (< .cse3 0) (not (= (select |c_#valid| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29|) 0)) (not (= v_ArrVal_5625 (store (select (store |c_#memory_int| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| v_ArrVal_5648) .cse0) .cse3 (select v_ArrVal_5625 .cse3)))) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_29| 1)))))) is different from false [2023-11-06 23:05:06,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3518681] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:06,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:06,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 36] total 72 [2023-11-06 23:05:06,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647726970] [2023-11-06 23:05:06,757 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:06,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-06 23:05:06,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-06 23:05:06,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=6297, Unknown=62, NotChecked=322, Total=6972 [2023-11-06 23:05:06,761 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand has 72 states, 68 states have (on average 1.5588235294117647) internal successors, (106), 63 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 23:05:18,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:18,981 INFO L93 Difference]: Finished difference Result 185 states and 203 transitions. [2023-11-06 23:05:18,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:05:18,981 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 68 states have (on average 1.5588235294117647) internal successors, (106), 63 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 61 [2023-11-06 23:05:18,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:18,983 INFO L225 Difference]: With dead ends: 185 [2023-11-06 23:05:18,983 INFO L226 Difference]: Without dead ends: 185 [2023-11-06 23:05:18,984 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 2109 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=632, Invalid=10645, Unknown=73, NotChecked=422, Total=11772 [2023-11-06 23:05:18,985 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 354 mSDsluCounter, 2282 mSDsCounter, 0 mSdLazyCounter, 3666 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 2331 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:18,985 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 2331 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3666 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2023-11-06 23:05:18,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-06 23:05:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 110. [2023-11-06 23:05:18,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 85 states have (on average 1.3411764705882352) internal successors, (114), 105 states have internal predecessors, (114), 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) [2023-11-06 23:05:18,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2023-11-06 23:05:18,990 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 61 [2023-11-06 23:05:18,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:18,990 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2023-11-06 23:05:18,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 68 states have (on average 1.5588235294117647) internal successors, (106), 63 states have internal predecessors, (106), 6 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-06 23:05:18,991 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2023-11-06 23:05:18,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-06 23:05:18,991 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:18,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1] [2023-11-06 23:05:19,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:19,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:19,198 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr74ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:05:19,199 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:19,199 INFO L85 PathProgramCache]: Analyzing trace with hash -448286909, now seen corresponding path program 1 times [2023-11-06 23:05:19,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:19,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160909013] [2023-11-06 23:05:19,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:19,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:19,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:19,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:05:19,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:19,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:05:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:19,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:05:19,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:19,962 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:19,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160909013] [2023-11-06 23:05:19,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160909013] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:19,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499227759] [2023-11-06 23:05:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:19,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:19,963 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:19,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:05:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:20,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-06 23:05:20,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:20,463 INFO L351 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 [2023-11-06 23:05:20,607 INFO L351 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 [2023-11-06 23:05:20,661 WARN L861 $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|))) (not (= |node_create_~temp~0#1.base| 0)))) is different from true [2023-11-06 23:05:20,708 INFO L351 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 [2023-11-06 23:05:20,778 INFO L351 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 [2023-11-06 23:05:20,898 INFO L322 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2023-11-06 23:05:20,898 INFO L351 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 15 treesize of output 15 [2023-11-06 23:05:20,949 INFO L351 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 [2023-11-06 23:05:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 14 not checked. [2023-11-06 23:05:20,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-11-06 23:05:21,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499227759] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:21,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:21,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [18, 11] total 32 [2023-11-06 23:05:21,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719769803] [2023-11-06 23:05:21,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:05:21,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:05:21,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:21,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:05:21,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=833, Unknown=1, NotChecked=58, Total=992 [2023-11-06 23:05:21,995 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:05:22,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:22,360 INFO L93 Difference]: Finished difference Result 102 states and 110 transitions. [2023-11-06 23:05:22,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-06 23:05:22,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 62 [2023-11-06 23:05:22,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:22,361 INFO L225 Difference]: With dead ends: 102 [2023-11-06 23:05:22,361 INFO L226 Difference]: Without dead ends: 100 [2023-11-06 23:05:22,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 7 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=132, Invalid=1061, Unknown=1, NotChecked=66, Total=1260 [2023-11-06 23:05:22,362 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 87 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:22,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 296 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-06 23:05:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-06 23:05:22,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-06 23:05:22,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 75 states have (on average 1.36) internal successors, (102), 95 states have internal predecessors, (102), 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) [2023-11-06 23:05:22,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 108 transitions. [2023-11-06 23:05:22,366 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 108 transitions. Word has length 62 [2023-11-06 23:05:22,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:22,366 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 108 transitions. [2023-11-06 23:05:22,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-06 23:05:22,367 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 108 transitions. [2023-11-06 23:05:22,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:05:22,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:22,368 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-11-06 23:05:22,376 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:05:22,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:22,576 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr52REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:05:22,576 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:22,577 INFO L85 PathProgramCache]: Analyzing trace with hash 918450378, now seen corresponding path program 1 times [2023-11-06 23:05:22,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:22,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596961354] [2023-11-06 23:05:22,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:22,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:25,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:05:25,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:05:26,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:26,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:05:26,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:28,167 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:28,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:28,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596961354] [2023-11-06 23:05:28,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596961354] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:28,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299719159] [2023-11-06 23:05:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:28,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:28,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:28,169 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:28,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:05:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:28,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 134 conjunts are in the unsatisfiable core [2023-11-06 23:05:28,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:28,683 INFO L351 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 [2023-11-06 23:05:28,692 INFO L351 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 [2023-11-06 23:05:28,957 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:05:28,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:05:29,177 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:05:29,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:29,455 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:05:29,456 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 29 [2023-11-06 23:05:29,800 INFO L351 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:05:30,017 INFO L351 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 16 treesize of output 11 [2023-11-06 23:05:30,379 INFO L351 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 16 treesize of output 11 [2023-11-06 23:05:30,413 INFO L351 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 41 treesize of output 28 [2023-11-06 23:05:30,996 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:05:30,996 INFO L351 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 79 treesize of output 30 [2023-11-06 23:05:31,007 INFO L351 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 [2023-11-06 23:05:31,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:31,017 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-06 23:05:31,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:31,809 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:05:31,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 58 [2023-11-06 23:05:31,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:31,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:31,883 INFO L322 Elim1Store]: treesize reduction 72, result has 37.4 percent of original size [2023-11-06 23:05:31,883 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 39 treesize of output 65 [2023-11-06 23:05:31,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:31,925 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 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 [2023-11-06 23:05:34,247 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-06 23:05:34,248 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 145 treesize of output 70 [2023-11-06 23:05:34,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:34,288 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 11 [2023-11-06 23:05:34,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:34,577 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:05:34,577 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 65 treesize of output 52 [2023-11-06 23:05:34,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:34,611 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 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 [2023-11-06 23:05:34,671 INFO L322 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-06 23:05:34,671 INFO L351 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 95 [2023-11-06 23:05:34,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:34,710 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 11 [2023-11-06 23:05:34,995 INFO L322 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-06 23:05:34,996 INFO L351 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 107 [2023-11-06 23:05:35,011 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 11 [2023-11-06 23:05:35,343 INFO L351 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 [2023-11-06 23:05:36,030 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:05:36,030 INFO L351 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 133 treesize of output 48 [2023-11-06 23:05:36,602 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:05:36,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:05:41,663 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| Int) (v_ArrVal_6232 (Array Int Int)) (v_ArrVal_6231 (Array Int Int)) (v_ArrVal_6245 (Array Int Int)) (v_ArrVal_6234 (Array Int Int)) (v_ArrVal_6244 (Array Int Int)) (v_ArrVal_6233 (Array Int Int)) (v_ArrVal_6228 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| v_ArrVal_6244) |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (or (not (= 0 (select |c_#valid| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37|))) (< .cse0 0) (< |c_#StackHeapBarrier| (+ |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| 1)) (= (select (store |c_#valid| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| 1) (let ((.cse5 (store |c_#memory_$Pointer$.base| |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| v_ArrVal_6245))) (let ((.cse2 (select (select .cse5 |c_ULTIMATE.start_dll_circular_insert_~head#1.base|) |c_ULTIMATE.start_dll_circular_insert_~head#1.offset|))) (let ((.cse3 (select .cse5 .cse2))) (let ((.cse4 (select .cse3 .cse0))) (select (let ((.cse1 (store (store (store |c_#memory_$Pointer$.base| .cse2 (store .cse3 .cse0 |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37|)) |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| v_ArrVal_6231) .cse4 v_ArrVal_6234))) (select .cse1 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (select (select (store (store (store |c_#memory_$Pointer$.offset| .cse2 v_ArrVal_6228) |v_ULTIMATE.start_dll_circular_insert_#t~ret9#1.base_37| v_ArrVal_6232) .cse4 v_ArrVal_6233) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))))))) 1)))) is different from false [2023-11-06 23:05:41,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299719159] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:41,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:05:41,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35] total 70 [2023-11-06 23:05:41,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608116485] [2023-11-06 23:05:41,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:05:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-11-06 23:05:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:05:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-11-06 23:05:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=5927, Unknown=108, NotChecked=156, Total=6480 [2023-11-06 23:05:41,670 INFO L87 Difference]: Start difference. First operand 100 states and 108 transitions. Second operand has 71 states, 67 states have (on average 1.671641791044776) internal successors, (112), 62 states have internal predecessors, (112), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:05:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:05:50,509 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2023-11-06 23:05:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-06 23:05:50,510 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 67 states have (on average 1.671641791044776) internal successors, (112), 62 states have internal predecessors, (112), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 63 [2023-11-06 23:05:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:05:50,511 INFO L225 Difference]: With dead ends: 141 [2023-11-06 23:05:50,511 INFO L226 Difference]: Without dead ends: 141 [2023-11-06 23:05:50,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2139 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=558, Invalid=9233, Unknown=113, NotChecked=196, Total=10100 [2023-11-06 23:05:50,513 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 452 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 3222 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 3254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 3222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:05:50,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [452 Valid, 1641 Invalid, 3254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 3222 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-06 23:05:50,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-06 23:05:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 105. [2023-11-06 23:05:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 80 states have (on average 1.375) internal successors, (110), 100 states have internal predecessors, (110), 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) [2023-11-06 23:05:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2023-11-06 23:05:50,516 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 63 [2023-11-06 23:05:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:05:50,517 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2023-11-06 23:05:50,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 67 states have (on average 1.671641791044776) internal successors, (112), 62 states have internal predecessors, (112), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2023-11-06 23:05:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2023-11-06 23:05:50,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-06 23:05:50,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:05:50,518 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1] [2023-11-06 23:05:50,527 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-06 23:05:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:50,726 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr53REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 79 more)] === [2023-11-06 23:05:50,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:05:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash 918450379, now seen corresponding path program 1 times [2023-11-06 23:05:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:05:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545406659] [2023-11-06 23:05:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:05:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:54,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-06 23:05:54,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2023-11-06 23:05:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:54,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2023-11-06 23:05:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-06 23:05:55,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:05:55,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545406659] [2023-11-06 23:05:55,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545406659] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:05:55,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806183595] [2023-11-06 23:05:55,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:05:55,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:05:55,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:05:55,716 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:05:55,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e23a4d51-e034-4e7d-89b9-c2b61dcfb5ee/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:05:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:05:56,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 164 conjunts are in the unsatisfiable core [2023-11-06 23:05:56,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:05:56,249 INFO L351 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 [2023-11-06 23:05:56,259 INFO L351 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 [2023-11-06 23:05:56,591 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:05:56,591 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-11-06 23:05:56,859 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:05:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:57,171 INFO L322 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-11-06 23:05:57,171 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 22 treesize of output 29 [2023-11-06 23:05:57,512 INFO L351 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 [2023-11-06 23:05:57,519 INFO L351 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 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-06 23:05:57,775 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:05:57,775 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 56 [2023-11-06 23:05:57,784 INFO L351 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 24 treesize of output 11 [2023-11-06 23:05:58,238 INFO L322 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-06 23:05:58,238 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 51 [2023-11-06 23:05:58,256 INFO L351 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 24 treesize of output 11 [2023-11-06 23:05:58,440 INFO L351 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 [2023-11-06 23:05:58,453 INFO L351 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 41 treesize of output 21 [2023-11-06 23:05:58,893 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:05:58,893 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 34 [2023-11-06 23:05:58,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,902 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-11-06 23:05:58,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:58,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-06 23:05:59,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,724 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-06 23:05:59,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,752 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:05:59,753 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 79 treesize of output 60 [2023-11-06 23:05:59,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:05:59,809 INFO L322 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2023-11-06 23:05:59,809 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 33 [2023-11-06 23:06:02,032 INFO L322 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-06 23:06:02,033 INFO L351 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 60 [2023-11-06 23:06:02,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,065 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 25 [2023-11-06 23:06:02,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,362 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:06:02,363 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2023-11-06 23:06:02,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,376 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-06 23:06:02,458 INFO L322 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2023-11-06 23:06:02,459 INFO L351 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 92 [2023-11-06 23:06:02,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,497 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 25 [2023-11-06 23:06:02,800 INFO L322 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2023-11-06 23:06:02,800 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 91 treesize of output 66 [2023-11-06 23:06:02,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:02,817 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 25 [2023-11-06 23:06:03,652 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-06 23:06:03,652 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 33 [2023-11-06 23:06:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-06 23:06:04,160 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 15 treesize of output 7 [2023-11-06 23:06:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-06 23:06:04,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:06:05,258 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_6551 (Array Int Int))) (let ((.cse1 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_6551))) (let ((.cse0 (select (select .cse1 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (< .cse0 0) (forall ((v_ArrVal_6552 (Array Int Int))) (let ((.cse3 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_6552))) (let ((.cse2 (select (select .cse3 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (<= (+ (select (select .cse1 .cse2) .cse0) 12) (select |c_#length| (select (select .cse3 .cse2) .cse0)))))))))) (forall ((v_ArrVal_6551 (Array Int Int))) (let ((.cse4 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_6551))) (let ((.cse5 (select (select .cse4 |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (or (forall ((v_ArrVal_6552 (Array Int Int))) (<= 0 (+ (select (select .cse4 (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_circular_insert_~last~1#1.base| v_ArrVal_6552) |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) .cse5) 8))) (< .cse5 0)))))) is different from false [2023-11-06 23:06:09,175 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-06 23:06:09,175 INFO L351 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 720 treesize of output 724 [2023-11-06 23:06:14,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806183595] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 23:06:14,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:06:14,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 73 [2023-11-06 23:06:14,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425059387] [2023-11-06 23:06:14,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:06:14,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-11-06 23:06:14,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:06:14,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-11-06 23:06:14,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=7375, Unknown=3, NotChecked=172, Total=7832 [2023-11-06 23:06:14,248 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 74 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 65 states have internal predecessors, (114), 5 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6)