./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a0165632 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_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 04:29:56,424 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 04:29:56,519 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2024-11-09 04:29:56,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 04:29:56,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 04:29:56,568 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 04:29:56,571 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 04:29:56,572 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 04:29:56,573 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 04:29:56,574 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 04:29:56,575 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-09 04:29:56,576 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-09 04:29:56,577 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-09 04:29:56,577 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-09 04:29:56,579 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-09 04:29:56,580 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-09 04:29:56,580 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-09 04:29:56,581 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-09 04:29:56,581 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-09 04:29:56,581 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-09 04:29:56,582 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-09 04:29:56,586 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-09 04:29:56,586 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 04:29:56,587 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 04:29:56,587 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 04:29:56,587 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 04:29:56,588 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 04:29:56,588 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 04:29:56,588 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 04:29:56,589 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 04:29:56,589 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 04:29:56,589 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 04:29:56,592 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 04:29:56,592 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 04:29:56,593 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 04:29:56,594 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 04:29:56,594 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 04:29:56,594 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 04:29:56,594 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 04:29:56,595 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 04:29:56,595 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 04:29:56,595 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:29:56,596 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 04:29:56,596 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 04:29:56,597 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-09 04:29:56,597 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 04:29:56,597 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 04:29:56,598 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-09 04:29:56,598 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 04:29:56,599 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e47f94c757882803b8e19e21a897c3f5ab1653c3391e3b246153a1c416bdab7c [2024-11-09 04:29:56,891 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 04:29:56,937 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 04:29:56,940 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 04:29:56,942 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 04:29:56,942 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 04:29:56,944 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/../../sv-benchmarks/c/heap-manipulation/merge_sort-2.i Unable to find full path for "g++" [2024-11-09 04:29:58,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 04:29:59,298 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 04:29:59,299 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/sv-benchmarks/c/heap-manipulation/merge_sort-2.i [2024-11-09 04:29:59,317 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/data/2861e7a9d/92eb44ac1c734cab8fe0b880a2fb50bc/FLAG5ce51253d [2024-11-09 04:29:59,557 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/data/2861e7a9d/92eb44ac1c734cab8fe0b880a2fb50bc [2024-11-09 04:29:59,564 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 04:29:59,568 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 04:29:59,574 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 04:29:59,574 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 04:29:59,586 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 04:29:59,593 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:59" (1/1) ... [2024-11-09 04:29:59,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b85dbd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:29:59, skipping insertion in model container [2024-11-09 04:29:59,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:29:59" (1/1) ... [2024-11-09 04:29:59,691 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 04:30:00,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:30:00,199 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 04:30:00,338 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 04:30:00,386 INFO L204 MainTranslator]: Completed translation [2024-11-09 04:30:00,387 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00 WrapperNode [2024-11-09 04:30:00,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 04:30:00,389 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 04:30:00,389 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 04:30:00,389 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 04:30:00,398 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,418 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,463 INFO L138 Inliner]: procedures = 125, calls = 84, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 282 [2024-11-09 04:30:00,463 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 04:30:00,467 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 04:30:00,467 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 04:30:00,467 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 04:30:00,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,480 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,489 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,489 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,501 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,515 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,521 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,528 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 04:30:00,532 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 04:30:00,532 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 04:30:00,532 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 04:30:00,534 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (1/1) ... [2024-11-09 04:30:00,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-09 04:30:00,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:00,617 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-09 04:30:00,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-09 04:30:00,688 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-09 04:30:00,689 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2024-11-09 04:30:00,690 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2024-11-09 04:30:00,690 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2024-11-09 04:30:00,690 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2024-11-09 04:30:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-09 04:30:00,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 04:30:00,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 04:30:00,693 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 04:30:00,907 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 04:30:00,910 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 04:30:01,830 INFO L? ?]: Removed 245 outVars from TransFormulas that were not future-live. [2024-11-09 04:30:01,830 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 04:30:01,963 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 04:30:01,964 INFO L316 CfgBuilder]: Removed 31 assume(true) statements. [2024-11-09 04:30:01,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:30:01 BoogieIcfgContainer [2024-11-09 04:30:01,964 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 04:30:01,967 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 04:30:01,967 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 04:30:01,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 04:30:01,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:29:59" (1/3) ... [2024-11-09 04:30:01,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb3e8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:30:01, skipping insertion in model container [2024-11-09 04:30:01,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:30:00" (2/3) ... [2024-11-09 04:30:01,975 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fb3e8d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:30:01, skipping insertion in model container [2024-11-09 04:30:01,975 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:30:01" (3/3) ... [2024-11-09 04:30:01,976 INFO L112 eAbstractionObserver]: Analyzing ICFG merge_sort-2.i [2024-11-09 04:30:01,991 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 04:30:01,991 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 105 error locations. [2024-11-09 04:30:02,041 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 04:30:02,047 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2fea535, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 04:30:02,047 INFO L334 AbstractCegarLoop]: Starting to check reachability of 105 error locations. [2024-11-09 04:30:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand has 236 states, 113 states have (on average 2.4601769911504423) internal successors, (278), 233 states have internal predecessors, (278), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-11-09 04:30:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:30:02,057 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:02,057 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:30:02,057 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:02,063 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash 19126591, now seen corresponding path program 1 times [2024-11-09 04:30:02,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:02,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096546433] [2024-11-09 04:30:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:02,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:02,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:02,329 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:02,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096546433] [2024-11-09 04:30:02,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096546433] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:02,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:02,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:02,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803751995] [2024-11-09 04:30:02,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:02,344 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:02,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:02,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:02,388 INFO L87 Difference]: Start difference. First operand has 236 states, 113 states have (on average 2.4601769911504423) internal successors, (278), 233 states have internal predecessors, (278), 15 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:02,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:02,704 INFO L93 Difference]: Finished difference Result 232 states and 259 transitions. [2024-11-09 04:30:02,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:02,707 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 04:30:02,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:02,718 INFO L225 Difference]: With dead ends: 232 [2024-11-09 04:30:02,719 INFO L226 Difference]: Without dead ends: 231 [2024-11-09 04:30:02,721 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:02,725 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 3 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:02,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 378 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-09 04:30:02,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2024-11-09 04:30:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 112 states have (on average 2.1517857142857144) internal successors, (241), 228 states have internal predecessors, (241), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 258 transitions. [2024-11-09 04:30:02,788 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 258 transitions. Word has length 4 [2024-11-09 04:30:02,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:02,789 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 258 transitions. [2024-11-09 04:30:02,789 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:02,789 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 258 transitions. [2024-11-09 04:30:02,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2024-11-09 04:30:02,789 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:02,790 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2024-11-09 04:30:02,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 04:30:02,791 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:02,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:02,792 INFO L85 PathProgramCache]: Analyzing trace with hash 19126592, now seen corresponding path program 1 times [2024-11-09 04:30:02,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:02,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149989055] [2024-11-09 04:30:02,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:02,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:02,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:02,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149989055] [2024-11-09 04:30:02,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149989055] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:02,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:02,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:02,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537831344] [2024-11-09 04:30:02,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:02,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:02,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:02,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:02,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:02,961 INFO L87 Difference]: Start difference. First operand 231 states and 258 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:03,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:03,194 INFO L93 Difference]: Finished difference Result 229 states and 256 transitions. [2024-11-09 04:30:03,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:03,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2024-11-09 04:30:03,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:03,197 INFO L225 Difference]: With dead ends: 229 [2024-11-09 04:30:03,197 INFO L226 Difference]: Without dead ends: 229 [2024-11-09 04:30:03,197 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:03,199 INFO L432 NwaCegarLoop]: 226 mSDtfsCounter, 3 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:03,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 385 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2024-11-09 04:30:03,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2024-11-09 04:30:03,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 112 states have (on average 2.1339285714285716) internal successors, (239), 226 states have internal predecessors, (239), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 256 transitions. [2024-11-09 04:30:03,264 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 256 transitions. Word has length 4 [2024-11-09 04:30:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:03,265 INFO L471 AbstractCegarLoop]: Abstraction has 229 states and 256 transitions. [2024-11-09 04:30:03,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:03,266 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 256 transitions. [2024-11-09 04:30:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-09 04:30:03,268 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:03,268 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-09 04:30:03,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 04:30:03,269 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:03,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:03,270 INFO L85 PathProgramCache]: Analyzing trace with hash 592381719, now seen corresponding path program 1 times [2024-11-09 04:30:03,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:03,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185989877] [2024-11-09 04:30:03,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:03,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:03,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:03,324 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:03,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185989877] [2024-11-09 04:30:03,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185989877] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:03,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:03,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 04:30:03,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916556101] [2024-11-09 04:30:03,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:03,327 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:03,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:03,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:03,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:03,329 INFO L87 Difference]: Start difference. First operand 229 states and 256 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:03,624 INFO L93 Difference]: Finished difference Result 355 states and 402 transitions. [2024-11-09 04:30:03,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:03,627 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-09 04:30:03,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:03,629 INFO L225 Difference]: With dead ends: 355 [2024-11-09 04:30:03,630 INFO L226 Difference]: Without dead ends: 354 [2024-11-09 04:30:03,630 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:03,635 INFO L432 NwaCegarLoop]: 189 mSDtfsCounter, 127 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:03,636 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 329 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:03,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2024-11-09 04:30:03,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 232. [2024-11-09 04:30:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 115 states have (on average 2.1130434782608694) internal successors, (243), 229 states have internal predecessors, (243), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:03,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 260 transitions. [2024-11-09 04:30:03,660 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 260 transitions. Word has length 5 [2024-11-09 04:30:03,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:03,660 INFO L471 AbstractCegarLoop]: Abstraction has 232 states and 260 transitions. [2024-11-09 04:30:03,665 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:03,665 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 260 transitions. [2024-11-09 04:30:03,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:30:03,666 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:03,666 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:30:03,666 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 04:30:03,667 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:03,667 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:03,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1201320889, now seen corresponding path program 1 times [2024-11-09 04:30:03,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:03,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299602461] [2024-11-09 04:30:03,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:03,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:03,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:03,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:03,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299602461] [2024-11-09 04:30:03,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299602461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:03,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:03,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:03,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145819134] [2024-11-09 04:30:03,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:03,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:03,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:03,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:03,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:03,782 INFO L87 Difference]: Start difference. First operand 232 states and 260 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:03,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:03,974 INFO L93 Difference]: Finished difference Result 230 states and 258 transitions. [2024-11-09 04:30:03,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:03,975 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:30:03,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:03,976 INFO L225 Difference]: With dead ends: 230 [2024-11-09 04:30:03,976 INFO L226 Difference]: Without dead ends: 230 [2024-11-09 04:30:03,977 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:03,982 INFO L432 NwaCegarLoop]: 223 mSDtfsCounter, 1 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:03,983 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 374 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:03,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-11-09 04:30:04,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2024-11-09 04:30:04,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 115 states have (on average 2.0956521739130434) internal successors, (241), 227 states have internal predecessors, (241), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:04,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 258 transitions. [2024-11-09 04:30:04,003 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 258 transitions. Word has length 6 [2024-11-09 04:30:04,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:04,004 INFO L471 AbstractCegarLoop]: Abstraction has 230 states and 258 transitions. [2024-11-09 04:30:04,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,004 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 258 transitions. [2024-11-09 04:30:04,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-09 04:30:04,008 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:04,009 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 04:30:04,009 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 04:30:04,009 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:04,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:04,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1201320890, now seen corresponding path program 1 times [2024-11-09 04:30:04,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:04,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424367306] [2024-11-09 04:30:04,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:04,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:04,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:04,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424367306] [2024-11-09 04:30:04,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424367306] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:04,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:04,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:04,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18978949] [2024-11-09 04:30:04,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:04,181 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:04,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:04,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:04,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:04,183 INFO L87 Difference]: Start difference. First operand 230 states and 258 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:04,360 INFO L93 Difference]: Finished difference Result 228 states and 256 transitions. [2024-11-09 04:30:04,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:04,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-09 04:30:04,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:04,362 INFO L225 Difference]: With dead ends: 228 [2024-11-09 04:30:04,362 INFO L226 Difference]: Without dead ends: 228 [2024-11-09 04:30:04,363 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:04,364 INFO L432 NwaCegarLoop]: 223 mSDtfsCounter, 1 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:04,364 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 381 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:04,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2024-11-09 04:30:04,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2024-11-09 04:30:04,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 115 states have (on average 2.0782608695652174) internal successors, (239), 225 states have internal predecessors, (239), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:04,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 256 transitions. [2024-11-09 04:30:04,382 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 256 transitions. Word has length 6 [2024-11-09 04:30:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:04,382 INFO L471 AbstractCegarLoop]: Abstraction has 228 states and 256 transitions. [2024-11-09 04:30:04,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 256 transitions. [2024-11-09 04:30:04,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 04:30:04,383 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:04,383 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:04,383 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 04:30:04,383 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:04,383 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:04,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1952194924, now seen corresponding path program 1 times [2024-11-09 04:30:04,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:04,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022041850] [2024-11-09 04:30:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:04,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:04,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:04,433 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:04,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022041850] [2024-11-09 04:30:04,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022041850] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:04,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:04,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 04:30:04,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010323453] [2024-11-09 04:30:04,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:04,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 04:30:04,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 04:30:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:04,439 INFO L87 Difference]: Start difference. First operand 228 states and 256 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:04,561 INFO L93 Difference]: Finished difference Result 232 states and 259 transitions. [2024-11-09 04:30:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 04:30:04,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-09 04:30:04,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:04,564 INFO L225 Difference]: With dead ends: 232 [2024-11-09 04:30:04,564 INFO L226 Difference]: Without dead ends: 231 [2024-11-09 04:30:04,564 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 04:30:04,565 INFO L432 NwaCegarLoop]: 224 mSDtfsCounter, 4 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:04,566 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 433 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:04,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2024-11-09 04:30:04,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 227. [2024-11-09 04:30:04,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 114 states have (on average 2.0789473684210527) internal successors, (237), 224 states have internal predecessors, (237), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 254 transitions. [2024-11-09 04:30:04,575 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 254 transitions. Word has length 7 [2024-11-09 04:30:04,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:04,576 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 254 transitions. [2024-11-09 04:30:04,576 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,576 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 254 transitions. [2024-11-09 04:30:04,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 04:30:04,577 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:04,577 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:04,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 04:30:04,578 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr89ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:04,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:04,578 INFO L85 PathProgramCache]: Analyzing trace with hash 923399092, now seen corresponding path program 1 times [2024-11-09 04:30:04,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:04,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018889826] [2024-11-09 04:30:04,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:04,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:04,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:04,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:04,699 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:04,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018889826] [2024-11-09 04:30:04,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018889826] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:04,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:04,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:30:04,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918775219] [2024-11-09 04:30:04,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:04,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:30:04,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:04,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:30:04,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:30:04,702 INFO L87 Difference]: Start difference. First operand 227 states and 254 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:04,869 INFO L93 Difference]: Finished difference Result 272 states and 310 transitions. [2024-11-09 04:30:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:30:04,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-09 04:30:04,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:04,872 INFO L225 Difference]: With dead ends: 272 [2024-11-09 04:30:04,872 INFO L226 Difference]: Without dead ends: 272 [2024-11-09 04:30:04,873 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:04,877 INFO L432 NwaCegarLoop]: 211 mSDtfsCounter, 106 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:04,877 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 572 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:30:04,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-09 04:30:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 227. [2024-11-09 04:30:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 114 states have (on average 2.0701754385964914) internal successors, (236), 224 states have internal predecessors, (236), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 253 transitions. [2024-11-09 04:30:04,889 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 253 transitions. Word has length 11 [2024-11-09 04:30:04,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:04,890 INFO L471 AbstractCegarLoop]: Abstraction has 227 states and 253 transitions. [2024-11-09 04:30:04,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:04,890 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 253 transitions. [2024-11-09 04:30:04,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:30:04,891 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:04,891 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:04,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 04:30:04,892 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:04,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:04,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1672079375, now seen corresponding path program 1 times [2024-11-09 04:30:04,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:04,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250119591] [2024-11-09 04:30:04,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:04,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:05,047 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:05,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250119591] [2024-11-09 04:30:05,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250119591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:05,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:05,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:30:05,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165665176] [2024-11-09 04:30:05,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:05,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:05,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:05,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:05,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:05,050 INFO L87 Difference]: Start difference. First operand 227 states and 253 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:05,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:05,443 INFO L93 Difference]: Finished difference Result 224 states and 252 transitions. [2024-11-09 04:30:05,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:05,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:30:05,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:05,445 INFO L225 Difference]: With dead ends: 224 [2024-11-09 04:30:05,445 INFO L226 Difference]: Without dead ends: 224 [2024-11-09 04:30:05,445 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:05,446 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 139 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:05,446 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 441 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:05,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-11-09 04:30:05,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2024-11-09 04:30:05,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 116 states have (on average 1.9913793103448276) internal successors, (231), 217 states have internal predecessors, (231), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:05,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 248 transitions. [2024-11-09 04:30:05,454 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 248 transitions. Word has length 13 [2024-11-09 04:30:05,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:05,454 INFO L471 AbstractCegarLoop]: Abstraction has 220 states and 248 transitions. [2024-11-09 04:30:05,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:05,455 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 248 transitions. [2024-11-09 04:30:05,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-09 04:30:05,455 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:05,456 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:05,456 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 04:30:05,456 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:05,456 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1672079374, now seen corresponding path program 1 times [2024-11-09 04:30:05,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:05,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175458081] [2024-11-09 04:30:05,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:05,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:05,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:05,684 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:05,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175458081] [2024-11-09 04:30:05,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175458081] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:05,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:05,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:30:05,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486539830] [2024-11-09 04:30:05,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:05,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:05,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:05,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:05,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:05,688 INFO L87 Difference]: Start difference. First operand 220 states and 248 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:06,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:06,120 INFO L93 Difference]: Finished difference Result 300 states and 341 transitions. [2024-11-09 04:30:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:06,121 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-09 04:30:06,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:06,122 INFO L225 Difference]: With dead ends: 300 [2024-11-09 04:30:06,122 INFO L226 Difference]: Without dead ends: 300 [2024-11-09 04:30:06,123 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:06,123 INFO L432 NwaCegarLoop]: 174 mSDtfsCounter, 175 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:06,124 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 515 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:06,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-09 04:30:06,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 264. [2024-11-09 04:30:06,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 160 states have (on average 1.88125) internal successors, (301), 261 states have internal predecessors, (301), 15 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:06,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 318 transitions. [2024-11-09 04:30:06,131 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 318 transitions. Word has length 13 [2024-11-09 04:30:06,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:06,132 INFO L471 AbstractCegarLoop]: Abstraction has 264 states and 318 transitions. [2024-11-09 04:30:06,132 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:06,132 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 318 transitions. [2024-11-09 04:30:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-11-09 04:30:06,133 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:06,133 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:06,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 04:30:06,133 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:06,134 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash -539796321, now seen corresponding path program 1 times [2024-11-09 04:30:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:06,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799742435] [2024-11-09 04:30:06,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:06,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:06,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:06,203 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:06,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799742435] [2024-11-09 04:30:06,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799742435] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:06,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:06,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:06,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100811788] [2024-11-09 04:30:06,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:06,204 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:06,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:06,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:06,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:06,205 INFO L87 Difference]: Start difference. First operand 264 states and 318 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:06,415 INFO L93 Difference]: Finished difference Result 299 states and 338 transitions. [2024-11-09 04:30:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 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 15 [2024-11-09 04:30:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:06,417 INFO L225 Difference]: With dead ends: 299 [2024-11-09 04:30:06,418 INFO L226 Difference]: Without dead ends: 299 [2024-11-09 04:30:06,418 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:06,419 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 175 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:06,419 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 721 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:06,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-11-09 04:30:06,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 263. [2024-11-09 04:30:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 160 states have (on average 1.8625) internal successors, (298), 260 states have internal predecessors, (298), 14 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:06,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 314 transitions. [2024-11-09 04:30:06,426 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 314 transitions. Word has length 15 [2024-11-09 04:30:06,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:06,427 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 314 transitions. [2024-11-09 04:30:06,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:06,427 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 314 transitions. [2024-11-09 04:30:06,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 04:30:06,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:06,428 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:06,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 04:30:06,428 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:06,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash 280388306, now seen corresponding path program 1 times [2024-11-09 04:30:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143420080] [2024-11-09 04:30:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:06,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:06,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:06,551 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:06,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143420080] [2024-11-09 04:30:06,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143420080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:06,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:06,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:06,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985190024] [2024-11-09 04:30:06,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:06,553 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:06,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:06,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:06,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:06,554 INFO L87 Difference]: Start difference. First operand 263 states and 314 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:06,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:06,790 INFO L93 Difference]: Finished difference Result 262 states and 311 transitions. [2024-11-09 04:30:06,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:30:06,791 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2024-11-09 04:30:06,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:06,792 INFO L225 Difference]: With dead ends: 262 [2024-11-09 04:30:06,792 INFO L226 Difference]: Without dead ends: 262 [2024-11-09 04:30:06,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:06,794 INFO L432 NwaCegarLoop]: 198 mSDtfsCounter, 15 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:06,794 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 716 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:06,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-09 04:30:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2024-11-09 04:30:06,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 160 states have (on average 1.85) internal successors, (296), 259 states have internal predecessors, (296), 13 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 311 transitions. [2024-11-09 04:30:06,803 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 311 transitions. Word has length 22 [2024-11-09 04:30:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:06,804 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 311 transitions. [2024-11-09 04:30:06,804 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 311 transitions. [2024-11-09 04:30:06,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-09 04:30:06,806 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:06,806 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:06,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 04:30:06,807 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:06,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:06,807 INFO L85 PathProgramCache]: Analyzing trace with hash -765394660, now seen corresponding path program 1 times [2024-11-09 04:30:06,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:06,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363450228] [2024-11-09 04:30:06,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:06,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:06,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:06,943 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:06,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363450228] [2024-11-09 04:30:06,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363450228] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:06,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:06,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:06,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766892016] [2024-11-09 04:30:06,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:06,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:06,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:06,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:06,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:06,945 INFO L87 Difference]: Start difference. First operand 262 states and 311 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:07,211 INFO L93 Difference]: Finished difference Result 261 states and 308 transitions. [2024-11-09 04:30:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:30:07,212 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 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 22 [2024-11-09 04:30:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:07,213 INFO L225 Difference]: With dead ends: 261 [2024-11-09 04:30:07,213 INFO L226 Difference]: Without dead ends: 261 [2024-11-09 04:30:07,213 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:07,214 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 15 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:07,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 706 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-11-09 04:30:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2024-11-09 04:30:07,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 160 states have (on average 1.8375) internal successors, (294), 258 states have internal predecessors, (294), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2024-11-09 04:30:07,221 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 22 [2024-11-09 04:30:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:07,221 INFO L471 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2024-11-09 04:30:07,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2024-11-09 04:30:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 04:30:07,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:07,222 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:07,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 04:30:07,222 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:07,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash 638880376, now seen corresponding path program 1 times [2024-11-09 04:30:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548254799] [2024-11-09 04:30:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:07,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:07,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:07,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:07,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548254799] [2024-11-09 04:30:07,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548254799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:07,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:07,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:30:07,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824866554] [2024-11-09 04:30:07,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:07,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:30:07,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:07,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:30:07,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:07,745 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:08,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:08,342 INFO L93 Difference]: Finished difference Result 289 states and 323 transitions. [2024-11-09 04:30:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:30:08,343 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 04:30:08,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:08,345 INFO L225 Difference]: With dead ends: 289 [2024-11-09 04:30:08,348 INFO L226 Difference]: Without dead ends: 289 [2024-11-09 04:30:08,348 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:30:08,349 INFO L432 NwaCegarLoop]: 170 mSDtfsCounter, 149 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:08,349 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 755 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:08,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2024-11-09 04:30:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 262. [2024-11-09 04:30:08,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.8385093167701863) internal successors, (296), 259 states have internal predecessors, (296), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:08,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 310 transitions. [2024-11-09 04:30:08,358 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 310 transitions. Word has length 24 [2024-11-09 04:30:08,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:08,359 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 310 transitions. [2024-11-09 04:30:08,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.0) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:08,360 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 310 transitions. [2024-11-09 04:30:08,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 04:30:08,362 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:08,362 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:08,362 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 04:30:08,362 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:08,363 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 638880375, now seen corresponding path program 1 times [2024-11-09 04:30:08,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:08,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301111549] [2024-11-09 04:30:08,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:08,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:08,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:08,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:08,672 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:08,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301111549] [2024-11-09 04:30:08,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301111549] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:08,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:08,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:30:08,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569572737] [2024-11-09 04:30:08,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:08,673 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:08,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:08,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:08,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:08,674 INFO L87 Difference]: Start difference. First operand 262 states and 310 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:09,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:09,410 INFO L93 Difference]: Finished difference Result 288 states and 322 transitions. [2024-11-09 04:30:09,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:09,411 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 04:30:09,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:09,412 INFO L225 Difference]: With dead ends: 288 [2024-11-09 04:30:09,412 INFO L226 Difference]: Without dead ends: 288 [2024-11-09 04:30:09,412 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:09,413 INFO L432 NwaCegarLoop]: 178 mSDtfsCounter, 147 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:09,413 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1006 Invalid, 840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:30:09,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-09 04:30:09,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 262. [2024-11-09 04:30:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.8322981366459627) internal successors, (295), 259 states have internal predecessors, (295), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 309 transitions. [2024-11-09 04:30:09,422 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 309 transitions. Word has length 24 [2024-11-09 04:30:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:09,422 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 309 transitions. [2024-11-09 04:30:09,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 309 transitions. [2024-11-09 04:30:09,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:30:09,424 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:09,424 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:09,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 04:30:09,424 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:09,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:09,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1662971671, now seen corresponding path program 1 times [2024-11-09 04:30:09,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:09,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72543385] [2024-11-09 04:30:09,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:09,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:09,613 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72543385] [2024-11-09 04:30:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72543385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:09,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:09,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 04:30:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403091720] [2024-11-09 04:30:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:09,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:30:09,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:30:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:09,615 INFO L87 Difference]: Start difference. First operand 262 states and 309 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:09,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:09,962 INFO L93 Difference]: Finished difference Result 287 states and 320 transitions. [2024-11-09 04:30:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:30:09,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 25 [2024-11-09 04:30:09,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:09,964 INFO L225 Difference]: With dead ends: 287 [2024-11-09 04:30:09,964 INFO L226 Difference]: Without dead ends: 287 [2024-11-09 04:30:09,964 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:30:09,965 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 149 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:09,965 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 1006 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2024-11-09 04:30:09,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 262. [2024-11-09 04:30:09,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.826086956521739) internal successors, (294), 259 states have internal predecessors, (294), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:09,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 308 transitions. [2024-11-09 04:30:09,976 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 308 transitions. Word has length 25 [2024-11-09 04:30:09,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:09,976 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 308 transitions. [2024-11-09 04:30:09,976 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:09,976 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 308 transitions. [2024-11-09 04:30:09,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-09 04:30:09,978 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:09,979 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:09,979 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 04:30:09,979 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:09,979 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:09,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1186956036, now seen corresponding path program 1 times [2024-11-09 04:30:09,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:09,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932658628] [2024-11-09 04:30:09,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:09,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:10,230 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:10,231 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:10,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932658628] [2024-11-09 04:30:10,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932658628] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:10,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:10,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 04:30:10,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904117341] [2024-11-09 04:30:10,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:10,232 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:30:10,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:10,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:30:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:10,234 INFO L87 Difference]: Start difference. First operand 262 states and 308 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:10,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:10,593 INFO L93 Difference]: Finished difference Result 286 states and 318 transitions. [2024-11-09 04:30:10,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 04:30:10,593 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 25 [2024-11-09 04:30:10,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:10,596 INFO L225 Difference]: With dead ends: 286 [2024-11-09 04:30:10,597 INFO L226 Difference]: Without dead ends: 286 [2024-11-09 04:30:10,597 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:30:10,597 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 147 mSDsluCounter, 820 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:10,598 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 1006 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 364 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:10,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2024-11-09 04:30:10,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 262. [2024-11-09 04:30:10,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.8198757763975155) internal successors, (293), 259 states have internal predecessors, (293), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 307 transitions. [2024-11-09 04:30:10,606 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 307 transitions. Word has length 25 [2024-11-09 04:30:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:10,606 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 307 transitions. [2024-11-09 04:30:10,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 307 transitions. [2024-11-09 04:30:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 04:30:10,608 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:10,608 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:10,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 04:30:10,609 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:10,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1562596327, now seen corresponding path program 1 times [2024-11-09 04:30:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:10,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641232428] [2024-11-09 04:30:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:10,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:10,921 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:10,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641232428] [2024-11-09 04:30:10,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641232428] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:10,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:10,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:30:10,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360764960] [2024-11-09 04:30:10,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:10,922 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:10,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:10,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:10,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:10,923 INFO L87 Difference]: Start difference. First operand 262 states and 307 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:11,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:11,565 INFO L93 Difference]: Finished difference Result 285 states and 317 transitions. [2024-11-09 04:30:11,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:11,566 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 04:30:11,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:11,567 INFO L225 Difference]: With dead ends: 285 [2024-11-09 04:30:11,567 INFO L226 Difference]: Without dead ends: 285 [2024-11-09 04:30:11,567 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:11,568 INFO L432 NwaCegarLoop]: 177 mSDtfsCounter, 141 mSDsluCounter, 698 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:11,568 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 875 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-09 04:30:11,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2024-11-09 04:30:11,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 262. [2024-11-09 04:30:11,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.813664596273292) internal successors, (292), 259 states have internal predecessors, (292), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:11,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 306 transitions. [2024-11-09 04:30:11,575 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 306 transitions. Word has length 24 [2024-11-09 04:30:11,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:11,575 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 306 transitions. [2024-11-09 04:30:11,575 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 306 transitions. [2024-11-09 04:30:11,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-09 04:30:11,576 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:11,577 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:11,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 04:30:11,577 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:11,577 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:11,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1562596326, now seen corresponding path program 1 times [2024-11-09 04:30:11,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:11,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222099602] [2024-11-09 04:30:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:11,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:11,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:12,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:12,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222099602] [2024-11-09 04:30:12,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222099602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:12,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:12,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:30:12,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044285573] [2024-11-09 04:30:12,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:12,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:12,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:12,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:12,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:12,009 INFO L87 Difference]: Start difference. First operand 262 states and 306 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:12,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:12,856 INFO L93 Difference]: Finished difference Result 284 states and 316 transitions. [2024-11-09 04:30:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:12,857 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2024-11-09 04:30:12,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:12,858 INFO L225 Difference]: With dead ends: 284 [2024-11-09 04:30:12,859 INFO L226 Difference]: Without dead ends: 284 [2024-11-09 04:30:12,859 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:12,860 INFO L432 NwaCegarLoop]: 171 mSDtfsCounter, 139 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 969 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:12,860 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 969 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-09 04:30:12,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2024-11-09 04:30:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 262. [2024-11-09 04:30:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 161 states have (on average 1.8074534161490683) internal successors, (291), 259 states have internal predecessors, (291), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 305 transitions. [2024-11-09 04:30:12,867 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 305 transitions. Word has length 24 [2024-11-09 04:30:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:12,867 INFO L471 AbstractCegarLoop]: Abstraction has 262 states and 305 transitions. [2024-11-09 04:30:12,867 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 305 transitions. [2024-11-09 04:30:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 04:30:12,868 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:12,868 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:12,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 04:30:12,869 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:12,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash -607024586, now seen corresponding path program 1 times [2024-11-09 04:30:12,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:12,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540636997] [2024-11-09 04:30:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:12,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:13,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:13,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540636997] [2024-11-09 04:30:13,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540636997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:13,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:13,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:30:13,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541021551] [2024-11-09 04:30:13,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:13,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:13,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:13,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:13,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:13,358 INFO L87 Difference]: Start difference. First operand 262 states and 305 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:13,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:13,981 INFO L93 Difference]: Finished difference Result 283 states and 314 transitions. [2024-11-09 04:30:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:13,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2024-11-09 04:30:13,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:13,983 INFO L225 Difference]: With dead ends: 283 [2024-11-09 04:30:13,983 INFO L226 Difference]: Without dead ends: 283 [2024-11-09 04:30:13,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:13,984 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 138 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:13,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1281 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:13,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2024-11-09 04:30:13,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 263. [2024-11-09 04:30:13,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 162 states have (on average 1.8024691358024691) internal successors, (292), 260 states have internal predecessors, (292), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:13,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 306 transitions. [2024-11-09 04:30:13,991 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 306 transitions. Word has length 29 [2024-11-09 04:30:13,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:13,992 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 306 transitions. [2024-11-09 04:30:13,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:13,992 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 306 transitions. [2024-11-09 04:30:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-11-09 04:30:13,993 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:13,993 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:13,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 04:30:13,994 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:13,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:13,994 INFO L85 PathProgramCache]: Analyzing trace with hash 2077350921, now seen corresponding path program 1 times [2024-11-09 04:30:13,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:13,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926154388] [2024-11-09 04:30:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:13,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:14,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:14,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:14,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926154388] [2024-11-09 04:30:14,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926154388] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:14,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:14,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:30:14,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833406001] [2024-11-09 04:30:14,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:14,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:30:14,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:14,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:30:14,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:30:14,508 INFO L87 Difference]: Start difference. First operand 263 states and 306 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:15,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:15,115 INFO L93 Difference]: Finished difference Result 282 states and 312 transitions. [2024-11-09 04:30:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:15,115 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 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 29 [2024-11-09 04:30:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:15,117 INFO L225 Difference]: With dead ends: 282 [2024-11-09 04:30:15,117 INFO L226 Difference]: Without dead ends: 282 [2024-11-09 04:30:15,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-11-09 04:30:15,118 INFO L432 NwaCegarLoop]: 186 mSDtfsCounter, 136 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 1281 SdHoareTripleChecker+Invalid, 569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:15,119 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 1281 Invalid, 569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:15,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2024-11-09 04:30:15,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 263. [2024-11-09 04:30:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 162 states have (on average 1.7962962962962963) internal successors, (291), 260 states have internal predecessors, (291), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 305 transitions. [2024-11-09 04:30:15,129 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 305 transitions. Word has length 29 [2024-11-09 04:30:15,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:15,129 INFO L471 AbstractCegarLoop]: Abstraction has 263 states and 305 transitions. [2024-11-09 04:30:15,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 305 transitions. [2024-11-09 04:30:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-09 04:30:15,131 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:15,131 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:15,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-09 04:30:15,131 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:15,132 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:15,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1313683022, now seen corresponding path program 1 times [2024-11-09 04:30:15,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:15,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357656573] [2024-11-09 04:30:15,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:15,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:15,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:15,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:15,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357656573] [2024-11-09 04:30:15,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357656573] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:15,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266291559] [2024-11-09 04:30:15,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:15,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:15,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:15,538 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:15,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 04:30:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:15,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-09 04:30:15,684 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:15,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:30:15,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:30:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:15,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:15,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:15,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266291559] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:15,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1143322391] [2024-11-09 04:30:16,011 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 04:30:16,011 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:16,016 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:16,021 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:16,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:22,490 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:25,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10984#(and (<= 1 |#StackHeapBarrier|) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_44| Int)) (and (not (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_44|) 1)) (or (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_43| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_34| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_34| 4)) |v_ULTIMATE.start_inspect_before_~shape#1.base_44|) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_34| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|)) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_34|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_43|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_34| 4)) |ULTIMATE.start_inspect_before_~shape#1.offset|))) (and (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= |ULTIMATE.start_main_~data~0#1.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_44|) (not (= |ULTIMATE.start_main_~data~0#1.base| 0)))))))' at error location [2024-11-09 04:30:25,168 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:25,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:25,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 5] total 12 [2024-11-09 04:30:25,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605057201] [2024-11-09 04:30:25,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:25,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 04:30:25,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:25,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 04:30:25,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=817, Unknown=1, NotChecked=0, Total=930 [2024-11-09 04:30:25,170 INFO L87 Difference]: Start difference. First operand 263 states and 305 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:25,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:25,722 INFO L93 Difference]: Finished difference Result 327 states and 376 transitions. [2024-11-09 04:30:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:30:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-09 04:30:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:25,724 INFO L225 Difference]: With dead ends: 327 [2024-11-09 04:30:25,724 INFO L226 Difference]: Without dead ends: 327 [2024-11-09 04:30:25,724 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=128, Invalid=927, Unknown=1, NotChecked=0, Total=1056 [2024-11-09 04:30:25,725 INFO L432 NwaCegarLoop]: 191 mSDtfsCounter, 127 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:25,726 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 1424 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:30:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2024-11-09 04:30:25,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 274. [2024-11-09 04:30:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 173 states have (on average 1.7514450867052023) internal successors, (303), 271 states have internal predecessors, (303), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 317 transitions. [2024-11-09 04:30:25,734 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 317 transitions. Word has length 28 [2024-11-09 04:30:25,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:25,734 INFO L471 AbstractCegarLoop]: Abstraction has 274 states and 317 transitions. [2024-11-09 04:30:25,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 317 transitions. [2024-11-09 04:30:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:30:25,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:25,735 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:25,756 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 04:30:25,936 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:25,936 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:25,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 859715484, now seen corresponding path program 1 times [2024-11-09 04:30:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:25,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580722225] [2024-11-09 04:30:25,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:25,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:26,061 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:26,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580722225] [2024-11-09 04:30:26,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580722225] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:26,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:26,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:26,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027708811] [2024-11-09 04:30:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:26,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:26,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:26,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:26,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:26,063 INFO L87 Difference]: Start difference. First operand 274 states and 317 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:26,295 INFO L93 Difference]: Finished difference Result 344 states and 392 transitions. [2024-11-09 04:30:26,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:26,295 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 04:30:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:26,297 INFO L225 Difference]: With dead ends: 344 [2024-11-09 04:30:26,297 INFO L226 Difference]: Without dead ends: 344 [2024-11-09 04:30:26,298 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:26,298 INFO L432 NwaCegarLoop]: 190 mSDtfsCounter, 130 mSDsluCounter, 514 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:26,298 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 704 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:26,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-09 04:30:26,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 276. [2024-11-09 04:30:26,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 175 states have (on average 1.7428571428571429) internal successors, (305), 273 states have internal predecessors, (305), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:26,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 319 transitions. [2024-11-09 04:30:26,307 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 319 transitions. Word has length 32 [2024-11-09 04:30:26,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:26,307 INFO L471 AbstractCegarLoop]: Abstraction has 276 states and 319 transitions. [2024-11-09 04:30:26,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:26,308 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 319 transitions. [2024-11-09 04:30:26,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:30:26,308 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:26,308 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:26,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-09 04:30:26,309 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr30REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:26,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 859588804, now seen corresponding path program 1 times [2024-11-09 04:30:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:26,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525669583] [2024-11-09 04:30:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:26,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:26,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:26,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:26,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525669583] [2024-11-09 04:30:26,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525669583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:26,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:26,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:30:26,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604768412] [2024-11-09 04:30:26,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:26,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:30:26,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:26,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:30:26,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:30:26,378 INFO L87 Difference]: Start difference. First operand 276 states and 319 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:26,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:26,690 INFO L93 Difference]: Finished difference Result 277 states and 323 transitions. [2024-11-09 04:30:26,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:30:26,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 04:30:26,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:26,692 INFO L225 Difference]: With dead ends: 277 [2024-11-09 04:30:26,693 INFO L226 Difference]: Without dead ends: 277 [2024-11-09 04:30:26,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:30:26,694 INFO L432 NwaCegarLoop]: 153 mSDtfsCounter, 143 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:26,694 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 298 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:26,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-09 04:30:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2024-11-09 04:30:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 178 states have (on average 1.7359550561797752) internal successors, (309), 274 states have internal predecessors, (309), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:26,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 323 transitions. [2024-11-09 04:30:26,700 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 323 transitions. Word has length 32 [2024-11-09 04:30:26,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:26,701 INFO L471 AbstractCegarLoop]: Abstraction has 277 states and 323 transitions. [2024-11-09 04:30:26,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:26,701 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 323 transitions. [2024-11-09 04:30:26,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-09 04:30:26,701 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:26,701 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:26,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-09 04:30:26,702 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr31REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:26,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:26,702 INFO L85 PathProgramCache]: Analyzing trace with hash 859588805, now seen corresponding path program 1 times [2024-11-09 04:30:26,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:26,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970403410] [2024-11-09 04:30:26,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:26,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:26,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:26,853 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:26,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970403410] [2024-11-09 04:30:26,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970403410] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:26,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:26,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:30:26,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106271982] [2024-11-09 04:30:26,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:26,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:26,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:26,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:26,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:26,857 INFO L87 Difference]: Start difference. First operand 277 states and 323 transitions. Second operand has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:27,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:27,309 INFO L93 Difference]: Finished difference Result 300 states and 335 transitions. [2024-11-09 04:30:27,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:27,309 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-09 04:30:27,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:27,311 INFO L225 Difference]: With dead ends: 300 [2024-11-09 04:30:27,311 INFO L226 Difference]: Without dead ends: 300 [2024-11-09 04:30:27,311 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:30:27,312 INFO L432 NwaCegarLoop]: 168 mSDtfsCounter, 78 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:27,312 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 502 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2024-11-09 04:30:27,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 281. [2024-11-09 04:30:27,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 182 states have (on average 1.7252747252747254) internal successors, (314), 278 states have internal predecessors, (314), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:27,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 328 transitions. [2024-11-09 04:30:27,319 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 328 transitions. Word has length 32 [2024-11-09 04:30:27,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:27,319 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 328 transitions. [2024-11-09 04:30:27,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.0) internal successors, (32), 5 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:27,319 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 328 transitions. [2024-11-09 04:30:27,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:30:27,320 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:27,320 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:27,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-09 04:30:27,320 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr67REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:27,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:27,321 INFO L85 PathProgramCache]: Analyzing trace with hash 879608363, now seen corresponding path program 1 times [2024-11-09 04:30:27,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:27,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607847603] [2024-11-09 04:30:27,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:27,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:27,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:27,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:30:27,383 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:27,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607847603] [2024-11-09 04:30:27,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607847603] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:27,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:27,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:30:27,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970816883] [2024-11-09 04:30:27,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:27,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:30:27,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:27,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:30:27,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:30:27,386 INFO L87 Difference]: Start difference. First operand 281 states and 328 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:27,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:27,673 INFO L93 Difference]: Finished difference Result 278 states and 322 transitions. [2024-11-09 04:30:27,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:30:27,674 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 04:30:27,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:27,675 INFO L225 Difference]: With dead ends: 278 [2024-11-09 04:30:27,675 INFO L226 Difference]: Without dead ends: 278 [2024-11-09 04:30:27,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:27,676 INFO L432 NwaCegarLoop]: 172 mSDtfsCounter, 101 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:27,676 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 351 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-09 04:30:27,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2024-11-09 04:30:27,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2024-11-09 04:30:27,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 182 states have (on average 1.6923076923076923) internal successors, (308), 275 states have internal predecessors, (308), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:27,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 322 transitions. [2024-11-09 04:30:27,687 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 322 transitions. Word has length 33 [2024-11-09 04:30:27,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:27,687 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 322 transitions. [2024-11-09 04:30:27,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:27,687 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 322 transitions. [2024-11-09 04:30:27,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-09 04:30:27,688 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:27,688 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:27,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-09 04:30:27,688 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr68REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:27,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash 879608364, now seen corresponding path program 1 times [2024-11-09 04:30:27,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:27,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103496857] [2024-11-09 04:30:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:27,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:27,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:27,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103496857] [2024-11-09 04:30:27,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103496857] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:27,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:27,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 04:30:27,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541187384] [2024-11-09 04:30:27,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:27,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:27,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:27,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:27,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:27,837 INFO L87 Difference]: Start difference. First operand 278 states and 322 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:28,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:28,269 INFO L93 Difference]: Finished difference Result 288 states and 323 transitions. [2024-11-09 04:30:28,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:28,269 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-09 04:30:28,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:28,271 INFO L225 Difference]: With dead ends: 288 [2024-11-09 04:30:28,271 INFO L226 Difference]: Without dead ends: 288 [2024-11-09 04:30:28,271 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:28,271 INFO L432 NwaCegarLoop]: 170 mSDtfsCounter, 75 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:28,272 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 500 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:30:28,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-09 04:30:28,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 278. [2024-11-09 04:30:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 182 states have (on average 1.6758241758241759) internal successors, (305), 275 states have internal predecessors, (305), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 319 transitions. [2024-11-09 04:30:28,278 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 319 transitions. Word has length 33 [2024-11-09 04:30:28,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:28,279 INFO L471 AbstractCegarLoop]: Abstraction has 278 states and 319 transitions. [2024-11-09 04:30:28,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:28,279 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 319 transitions. [2024-11-09 04:30:28,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 04:30:28,279 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:28,280 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:28,280 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-09 04:30:28,280 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:28,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1510119151, now seen corresponding path program 2 times [2024-11-09 04:30:28,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:28,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835984545] [2024-11-09 04:30:28,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:28,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:28,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:28,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835984545] [2024-11-09 04:30:28,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835984545] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:28,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783287805] [2024-11-09 04:30:28,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 04:30:28,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:28,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:28,876 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:28,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 04:30:29,057 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 04:30:29,057 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 04:30:29,059 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-09 04:30:29,062 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:29,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:30:29,098 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-09 04:30:29,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-09 04:30:29,130 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:30:29,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 04:30:29,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2024-11-09 04:30:29,333 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2024-11-09 04:30:29,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:29,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:29,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783287805] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:29,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [211638450] [2024-11-09 04:30:29,567 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 04:30:29,567 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:29,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:29,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:29,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:35,234 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:37,537 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14732#(and (<= 1 |#StackHeapBarrier|) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_51| Int)) (and (or (and (not (= |v_ULTIMATE.start_inspect_before_~shape#1.base_51| 0)) (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= |ULTIMATE.start_main_~data~0#1.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_51|)) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_50| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_39| Int)) (and (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_39| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_50|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_50|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_39| 4)) |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_50|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_39| 4)) |v_ULTIMATE.start_inspect_before_~shape#1.base_51|) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_39|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_50|) 1)))) (not (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_51|) 1)))))' at error location [2024-11-09 04:30:37,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:37,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:37,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2024-11-09 04:30:37,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877633148] [2024-11-09 04:30:37,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:37,538 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 04:30:37,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 04:30:37,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1052, Unknown=1, NotChecked=0, Total=1190 [2024-11-09 04:30:37,539 INFO L87 Difference]: Start difference. First operand 278 states and 319 transitions. Second operand has 17 states, 16 states have (on average 5.25) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:38,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:38,601 INFO L93 Difference]: Finished difference Result 328 states and 376 transitions. [2024-11-09 04:30:38,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 04:30:38,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 5.25) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-09 04:30:38,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:38,603 INFO L225 Difference]: With dead ends: 328 [2024-11-09 04:30:38,603 INFO L226 Difference]: Without dead ends: 328 [2024-11-09 04:30:38,604 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=214, Invalid=1591, Unknown=1, NotChecked=0, Total=1806 [2024-11-09 04:30:38,604 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 531 mSDsluCounter, 1148 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:38,605 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1347 Invalid, 1176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-09 04:30:38,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-11-09 04:30:38,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 279. [2024-11-09 04:30:38,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 183 states have (on average 1.6775956284153006) internal successors, (307), 276 states have internal predecessors, (307), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:38,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 321 transitions. [2024-11-09 04:30:38,612 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 321 transitions. Word has length 34 [2024-11-09 04:30:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:38,612 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 321 transitions. [2024-11-09 04:30:38,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 5.25) internal successors, (84), 17 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:38,612 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 321 transitions. [2024-11-09 04:30:38,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-09 04:30:38,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:38,613 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:38,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 04:30:38,816 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:38,817 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:38,817 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:38,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1510119150, now seen corresponding path program 1 times [2024-11-09 04:30:38,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:38,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836566027] [2024-11-09 04:30:38,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:38,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:39,579 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836566027] [2024-11-09 04:30:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836566027] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998523280] [2024-11-09 04:30:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:39,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:39,583 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:39,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 04:30:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:39,748 INFO L255 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-09 04:30:39,751 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:39,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:30:39,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:30:39,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:30:39,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:30:39,864 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 04:30:39,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 04:30:39,944 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:30:39,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-09 04:30:39,971 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-09 04:30:39,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 04:30:40,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:30:40,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:30:40,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-09 04:30:40,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-09 04:30:40,274 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:40,274 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:40,914 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:40,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998523280] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:40,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18761327] [2024-11-09 04:30:40,916 INFO L159 IcfgInterpreter]: Started Sifa with 26 locations of interest [2024-11-09 04:30:40,917 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:40,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:40,917 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:40,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:30:46,331 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:30:51,147 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15598#(exists ((|v_ULTIMATE.start_inspect_before_~shape#1.offset_46| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.base_58| Int)) (and (<= 1 |#StackHeapBarrier|) (or (and (= |ULTIMATE.start_main_~data~0#1.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_58|) (= |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| 0) (not (= |ULTIMATE.start_main_~data~0#1.base| 0))) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_57| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_45| Int)) (and (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_45|) (= |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_57|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_45| 4))) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_57|) 1) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_57|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_45| 4)) |v_ULTIMATE.start_inspect_before_~shape#1.base_58|) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_45| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_57|))))) (or (< (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| 4) 0) (< (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_58|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_46| 8))) (= 0 |ULTIMATE.start_main_~data~0#1.offset|)))' at error location [2024-11-09 04:30:51,147 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:30:51,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:30:51,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-09 04:30:51,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312149112] [2024-11-09 04:30:51,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:30:51,148 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-09 04:30:51,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:51,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-09 04:30:51,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1724, Unknown=1, NotChecked=0, Total=1892 [2024-11-09 04:30:51,150 INFO L87 Difference]: Start difference. First operand 279 states and 321 transitions. Second operand has 26 states, 25 states have (on average 3.84) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:53,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:53,656 INFO L93 Difference]: Finished difference Result 372 states and 420 transitions. [2024-11-09 04:30:53,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:30:53,657 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 3.84) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-09 04:30:53,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:53,658 INFO L225 Difference]: With dead ends: 372 [2024-11-09 04:30:53,658 INFO L226 Difference]: Without dead ends: 372 [2024-11-09 04:30:53,659 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=372, Invalid=2819, Unknown=1, NotChecked=0, Total=3192 [2024-11-09 04:30:53,660 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 1097 mSDsluCounter, 1466 mSDsCounter, 0 mSdLazyCounter, 1922 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1097 SdHoareTripleChecker+Valid, 1653 SdHoareTripleChecker+Invalid, 1949 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:53,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1097 Valid, 1653 Invalid, 1949 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1922 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-11-09 04:30:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2024-11-09 04:30:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 295. [2024-11-09 04:30:53,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 202 states have (on average 1.618811881188119) internal successors, (327), 292 states have internal predecessors, (327), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:53,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 341 transitions. [2024-11-09 04:30:53,666 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 341 transitions. Word has length 34 [2024-11-09 04:30:53,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:53,667 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 341 transitions. [2024-11-09 04:30:53,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 3.84) internal successors, (96), 26 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:53,667 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 341 transitions. [2024-11-09 04:30:53,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:30:53,667 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:53,668 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:53,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 04:30:53,871 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 04:30:53,872 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:53,872 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:53,872 INFO L85 PathProgramCache]: Analyzing trace with hash -803791133, now seen corresponding path program 1 times [2024-11-09 04:30:53,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:53,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714616023] [2024-11-09 04:30:53,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:53,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:53,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:53,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:53,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714616023] [2024-11-09 04:30:53,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714616023] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:30:53,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:30:53,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:30:53,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217831456] [2024-11-09 04:30:53,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:30:53,950 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:30:53,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:30:53,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:30:53,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:30:53,951 INFO L87 Difference]: Start difference. First operand 295 states and 341 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:54,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:30:54,151 INFO L93 Difference]: Finished difference Result 306 states and 346 transitions. [2024-11-09 04:30:54,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 04:30:54,151 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 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 35 [2024-11-09 04:30:54,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:30:54,152 INFO L225 Difference]: With dead ends: 306 [2024-11-09 04:30:54,153 INFO L226 Difference]: Without dead ends: 306 [2024-11-09 04:30:54,153 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:30:54,154 INFO L432 NwaCegarLoop]: 190 mSDtfsCounter, 76 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:30:54,154 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 707 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:30:54,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2024-11-09 04:30:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 295. [2024-11-09 04:30:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 202 states have (on average 1.613861386138614) internal successors, (326), 292 states have internal predecessors, (326), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:30:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 340 transitions. [2024-11-09 04:30:54,161 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 340 transitions. Word has length 35 [2024-11-09 04:30:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:30:54,161 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 340 transitions. [2024-11-09 04:30:54,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:30:54,161 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 340 transitions. [2024-11-09 04:30:54,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-09 04:30:54,162 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:30:54,162 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:30:54,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-11-09 04:30:54,162 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr36REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:30:54,163 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:30:54,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1424101674, now seen corresponding path program 1 times [2024-11-09 04:30:54,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:30:54,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555093411] [2024-11-09 04:30:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:54,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:30:54,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:54,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:30:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555093411] [2024-11-09 04:30:54,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555093411] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:30:54,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923451634] [2024-11-09 04:30:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:30:54,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:30:54,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:30:54,486 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:30:54,488 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 04:30:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:30:54,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:30:54,649 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:30:54,689 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:30:54,696 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:30:54,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:54,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:30:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:30:55,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923451634] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:30:55,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723860554] [2024-11-09 04:30:55,106 INFO L159 IcfgInterpreter]: Started Sifa with 34 locations of interest [2024-11-09 04:30:55,107 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:30:55,108 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:30:55,108 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:30:55,108 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:00,291 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:04,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [723860554] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:04,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:04,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [7, 6, 5] total 28 [2024-11-09 04:31:04,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76073511] [2024-11-09 04:31:04,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:04,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 04:31:04,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:04,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 04:31:04,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=693, Unknown=1, NotChecked=0, Total=812 [2024-11-09 04:31:04,212 INFO L87 Difference]: Start difference. First operand 295 states and 340 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:06,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:07,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:07,105 INFO L93 Difference]: Finished difference Result 337 states and 380 transitions. [2024-11-09 04:31:07,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-09 04:31:07,106 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-09 04:31:07,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:07,107 INFO L225 Difference]: With dead ends: 337 [2024-11-09 04:31:07,107 INFO L226 Difference]: Without dead ends: 337 [2024-11-09 04:31:07,108 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=118, Invalid=693, Unknown=1, NotChecked=0, Total=812 [2024-11-09 04:31:07,108 INFO L432 NwaCegarLoop]: 166 mSDtfsCounter, 120 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:07,108 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 733 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 608 Invalid, 1 Unknown, 0 Unchecked, 2.9s Time] [2024-11-09 04:31:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2024-11-09 04:31:07,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 299. [2024-11-09 04:31:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 206 states have (on average 1.6019417475728155) internal successors, (330), 296 states have internal predecessors, (330), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:07,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 344 transitions. [2024-11-09 04:31:07,116 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 344 transitions. Word has length 35 [2024-11-09 04:31:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:07,116 INFO L471 AbstractCegarLoop]: Abstraction has 299 states and 344 transitions. [2024-11-09 04:31:07,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 344 transitions. [2024-11-09 04:31:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-09 04:31:07,117 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:07,117 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:07,140 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-09 04:31:07,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:07,318 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:07,318 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:07,319 INFO L85 PathProgramCache]: Analyzing trace with hash -187475024, now seen corresponding path program 1 times [2024-11-09 04:31:07,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:07,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426625036] [2024-11-09 04:31:07,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:07,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:07,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:07,746 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:07,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426625036] [2024-11-09 04:31:07,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426625036] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:07,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111685649] [2024-11-09 04:31:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:07,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:07,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:07,749 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:07,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 04:31:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:07,906 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-09 04:31:07,910 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:07,947 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:31:07,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:31:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:08,151 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:08,361 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:08,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111685649] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:08,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [123583396] [2024-11-09 04:31:08,365 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:31:08,365 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:08,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:08,367 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:08,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:13,596 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:17,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [123583396] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:17,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:17,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [8, 6, 5] total 29 [2024-11-09 04:31:17,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726637914] [2024-11-09 04:31:17,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:17,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 04:31:17,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:17,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 04:31:17,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=736, Unknown=1, NotChecked=0, Total=870 [2024-11-09 04:31:17,783 INFO L87 Difference]: Start difference. First operand 299 states and 344 transitions. Second operand has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:19,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-09 04:31:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:21,772 INFO L93 Difference]: Finished difference Result 336 states and 378 transitions. [2024-11-09 04:31:21,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 04:31:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 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 38 [2024-11-09 04:31:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:21,774 INFO L225 Difference]: With dead ends: 336 [2024-11-09 04:31:21,774 INFO L226 Difference]: Without dead ends: 336 [2024-11-09 04:31:21,775 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 88 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=133, Invalid=736, Unknown=1, NotChecked=0, Total=870 [2024-11-09 04:31:21,775 INFO L432 NwaCegarLoop]: 164 mSDtfsCounter, 121 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 1380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:21,776 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 1099 Invalid, 1380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1379 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2024-11-09 04:31:21,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2024-11-09 04:31:21,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 304. [2024-11-09 04:31:21,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 211 states have (on average 1.5876777251184835) internal successors, (335), 301 states have internal predecessors, (335), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:21,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 349 transitions. [2024-11-09 04:31:21,782 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 349 transitions. Word has length 38 [2024-11-09 04:31:21,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:21,783 INFO L471 AbstractCegarLoop]: Abstraction has 304 states and 349 transitions. [2024-11-09 04:31:21,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:21,783 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 349 transitions. [2024-11-09 04:31:21,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-09 04:31:21,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:21,784 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:21,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 04:31:21,987 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:21,988 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:21,988 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash -181567846, now seen corresponding path program 1 times [2024-11-09 04:31:21,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:21,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038423375] [2024-11-09 04:31:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:21,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-09 04:31:22,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:22,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038423375] [2024-11-09 04:31:22,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038423375] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:22,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5707396] [2024-11-09 04:31:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:22,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:22,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:22,168 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:22,170 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 04:31:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:22,341 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 04:31:22,344 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:22,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:22,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:22,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:22,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:22,441 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:31:22,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 04:31:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:31:22,446 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-09 04:31:22,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5707396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:31:22,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [444558453] [2024-11-09 04:31:22,586 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2024-11-09 04:31:22,588 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:31:22,588 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:31:22,589 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:31:22,589 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:31:27,755 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 3 for LOIs [2024-11-09 04:31:27,758 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:31:31,634 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18921#(<= 1 |#StackHeapBarrier|)' at error location [2024-11-09 04:31:31,634 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:31:31,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:31:31,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 5 [2024-11-09 04:31:31,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897152129] [2024-11-09 04:31:31,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:31:31,635 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 04:31:31,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:31,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 04:31:31,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=486, Unknown=1, NotChecked=0, Total=600 [2024-11-09 04:31:31,636 INFO L87 Difference]: Start difference. First operand 304 states and 349 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:31,833 INFO L93 Difference]: Finished difference Result 302 states and 343 transitions. [2024-11-09 04:31:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:31:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 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 40 [2024-11-09 04:31:31,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:31,835 INFO L225 Difference]: With dead ends: 302 [2024-11-09 04:31:31,835 INFO L226 Difference]: Without dead ends: 302 [2024-11-09 04:31:31,836 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 98 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=119, Invalid=530, Unknown=1, NotChecked=0, Total=650 [2024-11-09 04:31:31,836 INFO L432 NwaCegarLoop]: 131 mSDtfsCounter, 393 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:31,836 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 236 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:31:31,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-11-09 04:31:31,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2024-11-09 04:31:31,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 211 states have (on average 1.5687203791469195) internal successors, (331), 299 states have internal predecessors, (331), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:31,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 343 transitions. [2024-11-09 04:31:31,842 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 343 transitions. Word has length 40 [2024-11-09 04:31:31,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:31,843 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 343 transitions. [2024-11-09 04:31:31,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:31,843 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 343 transitions. [2024-11-09 04:31:31,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:31:31,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:31,844 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:31,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 04:31:32,047 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-09 04:31:32,048 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:32,048 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash -2030208462, now seen corresponding path program 1 times [2024-11-09 04:31:32,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:32,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822395172] [2024-11-09 04:31:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:32,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:32,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:32,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:32,272 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:32,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822395172] [2024-11-09 04:31:32,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822395172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:32,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:32,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-11-09 04:31:32,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455912394] [2024-11-09 04:31:32,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:32,273 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 04:31:32,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:32,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 04:31:32,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-11-09 04:31:32,274 INFO L87 Difference]: Start difference. First operand 302 states and 343 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:32,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:32,749 INFO L93 Difference]: Finished difference Result 310 states and 344 transitions. [2024-11-09 04:31:32,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:31:32,749 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 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 41 [2024-11-09 04:31:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:32,751 INFO L225 Difference]: With dead ends: 310 [2024-11-09 04:31:32,751 INFO L226 Difference]: Without dead ends: 310 [2024-11-09 04:31:32,751 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:31:32,752 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 91 mSDsluCounter, 926 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:32,752 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 1099 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:31:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-09 04:31:32,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 302. [2024-11-09 04:31:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 211 states have (on average 1.5639810426540284) internal successors, (330), 299 states have internal predecessors, (330), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 342 transitions. [2024-11-09 04:31:32,757 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 342 transitions. Word has length 41 [2024-11-09 04:31:32,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:32,757 INFO L471 AbstractCegarLoop]: Abstraction has 302 states and 342 transitions. [2024-11-09 04:31:32,757 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 342 transitions. [2024-11-09 04:31:32,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:31:32,758 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:32,758 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:32,758 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-11-09 04:31:32,758 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:32,759 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash -2030272560, now seen corresponding path program 1 times [2024-11-09 04:31:32,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:32,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356277004] [2024-11-09 04:31:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:32,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:32,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:31:32,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:32,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356277004] [2024-11-09 04:31:32,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356277004] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:32,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:32,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 04:31:32,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696187683] [2024-11-09 04:31:32,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:32,924 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 04:31:32,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 04:31:32,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-09 04:31:32,925 INFO L87 Difference]: Start difference. First operand 302 states and 342 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:33,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:33,450 INFO L93 Difference]: Finished difference Result 321 states and 362 transitions. [2024-11-09 04:31:33,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-09 04:31:33,451 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-09 04:31:33,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:33,452 INFO L225 Difference]: With dead ends: 321 [2024-11-09 04:31:33,452 INFO L226 Difference]: Without dead ends: 321 [2024-11-09 04:31:33,452 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-09 04:31:33,453 INFO L432 NwaCegarLoop]: 171 mSDtfsCounter, 57 mSDsluCounter, 666 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 837 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:33,453 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 837 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:31:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2024-11-09 04:31:33,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 307. [2024-11-09 04:31:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 218 states have (on average 1.5321100917431192) internal successors, (334), 304 states have internal predecessors, (334), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:33,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 346 transitions. [2024-11-09 04:31:33,459 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 346 transitions. Word has length 41 [2024-11-09 04:31:33,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:33,460 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 346 transitions. [2024-11-09 04:31:33,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:33,460 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 346 transitions. [2024-11-09 04:31:33,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-09 04:31:33,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:33,461 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:33,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-11-09 04:31:33,461 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr74REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:33,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2030272559, now seen corresponding path program 1 times [2024-11-09 04:31:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033384545] [2024-11-09 04:31:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:33,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:33,802 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033384545] [2024-11-09 04:31:33,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033384545] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:33,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:33,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:31:33,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93956803] [2024-11-09 04:31:33,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:33,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-09 04:31:33,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:33,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-09 04:31:33,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-11-09 04:31:33,804 INFO L87 Difference]: Start difference. First operand 307 states and 346 transitions. Second operand has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:34,329 INFO L93 Difference]: Finished difference Result 334 states and 372 transitions. [2024-11-09 04:31:34,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-09 04:31:34,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2024-11-09 04:31:34,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:34,331 INFO L225 Difference]: With dead ends: 334 [2024-11-09 04:31:34,331 INFO L226 Difference]: Without dead ends: 334 [2024-11-09 04:31:34,331 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:31:34,332 INFO L432 NwaCegarLoop]: 169 mSDtfsCounter, 178 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:34,332 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 977 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-09 04:31:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-11-09 04:31:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 310. [2024-11-09 04:31:34,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 221 states have (on average 1.5248868778280542) internal successors, (337), 307 states have internal predecessors, (337), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:34,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 349 transitions. [2024-11-09 04:31:34,338 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 349 transitions. Word has length 41 [2024-11-09 04:31:34,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:34,339 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 349 transitions. [2024-11-09 04:31:34,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.555555555555555) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:34,339 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 349 transitions. [2024-11-09 04:31:34,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-11-09 04:31:34,340 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:34,340 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:34,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-11-09 04:31:34,340 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr73REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:34,340 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2119915732, now seen corresponding path program 1 times [2024-11-09 04:31:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035446522] [2024-11-09 04:31:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:34,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:34,657 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:31:34,657 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:34,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035446522] [2024-11-09 04:31:34,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035446522] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:31:34,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:31:34,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-09 04:31:34,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484009051] [2024-11-09 04:31:34,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:31:34,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-09 04:31:34,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:31:34,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-09 04:31:34,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-11-09 04:31:34,660 INFO L87 Difference]: Start difference. First operand 310 states and 349 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:31:35,298 INFO L93 Difference]: Finished difference Result 315 states and 354 transitions. [2024-11-09 04:31:35,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-09 04:31:35,298 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2024-11-09 04:31:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:31:35,299 INFO L225 Difference]: With dead ends: 315 [2024-11-09 04:31:35,300 INFO L226 Difference]: Without dead ends: 315 [2024-11-09 04:31:35,300 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-11-09 04:31:35,300 INFO L432 NwaCegarLoop]: 173 mSDtfsCounter, 42 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 1277 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-09 04:31:35,301 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 1277 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-09 04:31:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2024-11-09 04:31:35,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 309. [2024-11-09 04:31:35,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 220 states have (on average 1.5227272727272727) internal successors, (335), 306 states have internal predecessors, (335), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:31:35,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 347 transitions. [2024-11-09 04:31:35,306 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 347 transitions. Word has length 44 [2024-11-09 04:31:35,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:31:35,306 INFO L471 AbstractCegarLoop]: Abstraction has 309 states and 347 transitions. [2024-11-09 04:31:35,307 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:31:35,307 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 347 transitions. [2024-11-09 04:31:35,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:31:35,307 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:31:35,307 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:31:35,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-11-09 04:31:35,307 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr27REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:31:35,308 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:31:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1986706088, now seen corresponding path program 1 times [2024-11-09 04:31:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:31:35,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371762992] [2024-11-09 04:31:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:31:35,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:37,054 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:37,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:31:37,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371762992] [2024-11-09 04:31:37,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371762992] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:31:37,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205496543] [2024-11-09 04:31:37,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:31:37,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:31:37,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:31:37,057 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:31:37,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 04:31:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:31:37,253 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-09 04:31:37,257 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:31:37,281 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:31:37,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 04:31:37,361 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 04:31:37,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 04:31:37,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-09 04:31:37,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:31:37,454 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:31:37,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 22 [2024-11-09 04:31:37,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 04:31:37,654 INFO L349 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2024-11-09 04:31:37,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 21 [2024-11-09 04:31:37,706 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-09 04:31:37,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-09 04:31:37,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:31:37,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2024-11-09 04:31:37,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 32 [2024-11-09 04:31:37,884 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-09 04:31:37,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-09 04:31:37,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 18 treesize of output 13 [2024-11-09 04:31:37,910 INFO L378 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 [2024-11-09 04:31:38,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 29 [2024-11-09 04:31:38,019 INFO L378 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 19 treesize of output 18 [2024-11-09 04:31:38,108 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 04:31:38,108 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 25 [2024-11-09 04:31:38,130 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 04:31:38,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 48 [2024-11-09 04:31:39,415 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:31:39,428 INFO L349 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2024-11-09 04:31:39,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 103 treesize of output 49 [2024-11-09 04:31:39,442 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 04:31:39,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 36 treesize of output 19 [2024-11-09 04:31:39,524 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:31:39,524 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:31:46,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:31:46,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 107 treesize of output 100 [2024-11-09 04:31:46,213 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:31:46,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 74 [2024-11-09 04:31:46,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:31:46,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 600 treesize of output 592 [2024-11-09 04:31:46,288 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:31:46,289 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3246 treesize of output 3172 [2024-11-09 04:31:46,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 680 treesize of output 668 [2024-11-09 04:31:46,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 628 treesize of output 616 [2024-11-09 04:31:46,587 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:31:46,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 475 treesize of output 473 [2024-11-09 04:31:47,899 INFO L349 Elim1Store]: treesize reduction 8, result has 80.5 percent of original size [2024-11-09 04:31:47,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 2084 treesize of output 2058 [2024-11-09 04:32:02,565 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:32:02,565 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 45 [2024-11-09 04:32:02,585 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:32:02,585 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 164 [2024-11-09 04:32:02,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 292 treesize of output 280 [2024-11-09 04:32:02,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:32:02,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 225 treesize of output 223 [2024-11-09 04:32:06,891 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:06,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205496543] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:06,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653208142] [2024-11-09 04:32:06,893 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 04:32:06,893 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:06,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:06,894 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:06,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:12,014 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:18,832 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22430#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|)) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0))) (or (< (select |#length| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (+ (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 4)) (< (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (<= (+ 8 |ULTIMATE.start_inspect_before_~shape#1.offset|) (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|)))' at error location [2024-11-09 04:32:18,832 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:18,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:32:18,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 41 [2024-11-09 04:32:18,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909158664] [2024-11-09 04:32:18,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:18,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-11-09 04:32:18,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:18,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-11-09 04:32:18,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4015, Unknown=3, NotChecked=0, Total=4290 [2024-11-09 04:32:18,835 INFO L87 Difference]: Start difference. First operand 309 states and 347 transitions. Second operand has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 42 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:27,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:27,612 INFO L93 Difference]: Finished difference Result 366 states and 403 transitions. [2024-11-09 04:32:27,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:32:27,612 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 42 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-09 04:32:27,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:27,614 INFO L225 Difference]: With dead ends: 366 [2024-11-09 04:32:27,614 INFO L226 Difference]: Without dead ends: 366 [2024-11-09 04:32:27,616 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 18.0s TimeCoverageRelationStatistics Valid=507, Invalid=5970, Unknown=3, NotChecked=0, Total=6480 [2024-11-09 04:32:27,616 INFO L432 NwaCegarLoop]: 201 mSDtfsCounter, 1087 mSDsluCounter, 2700 mSDsCounter, 0 mSdLazyCounter, 3123 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1087 SdHoareTripleChecker+Valid, 2901 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:27,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1087 Valid, 2901 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3123 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2024-11-09 04:32:27,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-11-09 04:32:27,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 310. [2024-11-09 04:32:27,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 221 states have (on average 1.5248868778280542) internal successors, (337), 307 states have internal predecessors, (337), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:32:27,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 349 transitions. [2024-11-09 04:32:27,622 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 349 transitions. Word has length 45 [2024-11-09 04:32:27,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:27,623 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 349 transitions. [2024-11-09 04:32:27,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 3.1951219512195124) internal successors, (131), 42 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:27,623 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 349 transitions. [2024-11-09 04:32:27,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-11-09 04:32:27,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:27,624 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:27,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 04:32:27,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-09 04:32:27,825 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr26REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:32:27,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:27,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1986706089, now seen corresponding path program 1 times [2024-11-09 04:32:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:27,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795334058] [2024-11-09 04:32:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:29,208 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:29,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795334058] [2024-11-09 04:32:29,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795334058] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:29,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394132793] [2024-11-09 04:32:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:29,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:29,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:29,210 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:29,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 04:32:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:29,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-11-09 04:32:29,406 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:29,412 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:32:29,463 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 04:32:29,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 04:32:29,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:32:29,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-09 04:32:29,652 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-09 04:32:29,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-09 04:32:29,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-09 04:32:29,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-09 04:32:29,767 INFO L349 Elim1Store]: treesize reduction 32, result has 45.8 percent of original size [2024-11-09 04:32:29,767 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 23 treesize of output 33 [2024-11-09 04:32:29,862 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-09 04:32:29,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 33 [2024-11-09 04:32:29,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:32:30,006 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 04:32:30,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 116 treesize of output 75 [2024-11-09 04:32:31,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 04:32:32,425 INFO L349 Elim1Store]: treesize reduction 16, result has 71.9 percent of original size [2024-11-09 04:32:32,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 163 treesize of output 118 [2024-11-09 04:32:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:33,126 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:32:34,865 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:32:34,865 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 58 treesize of output 51 [2024-11-09 04:32:34,879 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:32:34,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 320 treesize of output 316 [2024-11-09 04:32:34,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 312 treesize of output 304 [2024-11-09 04:32:34,968 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:32:34,968 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 343 treesize of output 341 [2024-11-09 04:32:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:39,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394132793] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:32:39,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1047973383] [2024-11-09 04:32:39,928 INFO L159 IcfgInterpreter]: Started Sifa with 36 locations of interest [2024-11-09 04:32:39,928 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:32:39,928 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:32:39,928 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:32:39,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:32:44,910 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:32:49,713 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23473#(and (not (= (select |#valid| (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) 1)) (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|) (= (select |#valid| |ULTIMATE.start_inspect_before_~shape#1.base|) 1) (= |ULTIMATE.start_inspect_before_#t~mem29#1.offset| (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|)) (= 0 |ULTIMATE.start_main_~data~0#1.offset|) (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0)) (not (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) |ULTIMATE.start_inspect_before_~shape#1.offset|) 0))) (= (select (select |#memory_$Pointer$.base| |ULTIMATE.start_inspect_before_~shape#1.base|) (+ 4 |ULTIMATE.start_inspect_before_~shape#1.offset|)) 0) (or (not (= 0 |ULTIMATE.start_inspect_before_~shape#1.offset|)) (not (= |ULTIMATE.start_inspect_before_~shape#1.base| 0))) (<= (+ 8 |ULTIMATE.start_inspect_before_~shape#1.offset|) (select |#length| |ULTIMATE.start_inspect_before_~shape#1.base|)))' at error location [2024-11-09 04:32:49,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:32:49,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:32:49,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 17] total 46 [2024-11-09 04:32:49,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634917985] [2024-11-09 04:32:49,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:32:49,714 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-09 04:32:49,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:32:49,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-09 04:32:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=4638, Unknown=24, NotChecked=0, Total=4970 [2024-11-09 04:32:49,717 INFO L87 Difference]: Start difference. First operand 310 states and 349 transitions. Second operand has 47 states, 46 states have (on average 2.760869565217391) internal successors, (127), 47 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:32:56,988 INFO L93 Difference]: Finished difference Result 365 states and 402 transitions. [2024-11-09 04:32:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-09 04:32:56,988 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.760869565217391) internal successors, (127), 47 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2024-11-09 04:32:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:32:56,989 INFO L225 Difference]: With dead ends: 365 [2024-11-09 04:32:56,989 INFO L226 Difference]: Without dead ends: 365 [2024-11-09 04:32:56,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=584, Invalid=6701, Unknown=25, NotChecked=0, Total=7310 [2024-11-09 04:32:56,992 INFO L432 NwaCegarLoop]: 210 mSDtfsCounter, 935 mSDsluCounter, 3944 mSDsCounter, 0 mSdLazyCounter, 3491 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 4154 SdHoareTripleChecker+Invalid, 3515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-11-09 04:32:56,992 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [935 Valid, 4154 Invalid, 3515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3491 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2024-11-09 04:32:56,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2024-11-09 04:32:56,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 310. [2024-11-09 04:32:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 221 states have (on average 1.5203619909502262) internal successors, (336), 307 states have internal predecessors, (336), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:32:56,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 348 transitions. [2024-11-09 04:32:56,998 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 348 transitions. Word has length 45 [2024-11-09 04:32:56,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:32:56,999 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 348 transitions. [2024-11-09 04:32:56,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.760869565217391) internal successors, (127), 47 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:32:56,999 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 348 transitions. [2024-11-09 04:32:56,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:32:57,000 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:32:57,000 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:32:57,021 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 04:32:57,200 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-09 04:32:57,201 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:32:57,201 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:32:57,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1451773431, now seen corresponding path program 1 times [2024-11-09 04:32:57,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:32:57,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852518280] [2024-11-09 04:32:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:32:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:58,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:58,115 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:32:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852518280] [2024-11-09 04:32:58,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852518280] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:32:58,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271164173] [2024-11-09 04:32:58,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:32:58,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:32:58,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:32:58,117 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:32:58,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 04:32:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:32:58,330 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-11-09 04:32:58,334 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:32:58,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:32:58,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:32:58,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2024-11-09 04:32:58,461 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 04:32:58,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 04:32:58,509 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2024-11-09 04:32:58,526 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2024-11-09 04:32:58,547 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-09 04:32:58,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 04:32:58,597 INFO L378 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 24 treesize of output 12 [2024-11-09 04:32:58,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:32:58,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 35 [2024-11-09 04:32:59,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 04:32:59,262 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 04:32:59,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 23 [2024-11-09 04:32:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:32:59,266 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:00,323 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:00,323 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 44 [2024-11-09 04:33:00,327 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:00,334 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:00,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 81 [2024-11-09 04:33:00,343 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2024-11-09 04:33:00,418 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:00,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 78 [2024-11-09 04:33:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:00,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271164173] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:00,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [694926289] [2024-11-09 04:33:00,788 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2024-11-09 04:33:00,788 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:00,789 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:00,789 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:00,789 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:05,967 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 37 for LOIs [2024-11-09 04:33:05,982 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:11,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24508#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| Int)) (and (or (not (= |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2| 0)) (not (= |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 0))) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2|) 0) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 4)) 0) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2|) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|)) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2|) 0) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_2|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_2| 4)) 0))))' at error location [2024-11-09 04:33:11,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:11,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:11,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 14] total 34 [2024-11-09 04:33:11,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252433166] [2024-11-09 04:33:11,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:11,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-09 04:33:11,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:11,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-09 04:33:11,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=2971, Unknown=3, NotChecked=0, Total=3192 [2024-11-09 04:33:11,603 INFO L87 Difference]: Start difference. First operand 310 states and 348 transitions. Second operand has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 34 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:33:14,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:14,695 INFO L93 Difference]: Finished difference Result 364 states and 400 transitions. [2024-11-09 04:33:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-09 04:33:14,697 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 34 states have internal predecessors, (121), 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 46 [2024-11-09 04:33:14,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:14,698 INFO L225 Difference]: With dead ends: 364 [2024-11-09 04:33:14,698 INFO L226 Difference]: Without dead ends: 364 [2024-11-09 04:33:14,698 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=404, Invalid=4423, Unknown=3, NotChecked=0, Total=4830 [2024-11-09 04:33:14,699 INFO L432 NwaCegarLoop]: 207 mSDtfsCounter, 765 mSDsluCounter, 3405 mSDsCounter, 0 mSdLazyCounter, 2240 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 3612 SdHoareTripleChecker+Invalid, 2252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 2240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:14,699 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 3612 Invalid, 2252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 2240 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-09 04:33:14,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2024-11-09 04:33:14,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 310. [2024-11-09 04:33:14,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 221 states have (on average 1.5158371040723981) internal successors, (335), 307 states have internal predecessors, (335), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:33:14,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 347 transitions. [2024-11-09 04:33:14,705 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 347 transitions. Word has length 46 [2024-11-09 04:33:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:14,705 INFO L471 AbstractCegarLoop]: Abstraction has 310 states and 347 transitions. [2024-11-09 04:33:14,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.5588235294117645) internal successors, (121), 34 states have internal predecessors, (121), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:33:14,705 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 347 transitions. [2024-11-09 04:33:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-09 04:33:14,706 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:14,706 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:14,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 04:33:14,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-09 04:33:14,908 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:33:14,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:14,908 INFO L85 PathProgramCache]: Analyzing trace with hash -975757796, now seen corresponding path program 1 times [2024-11-09 04:33:14,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:14,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163308247] [2024-11-09 04:33:14,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:14,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:15,759 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163308247] [2024-11-09 04:33:15,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163308247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:15,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323111960] [2024-11-09 04:33:15,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:15,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:15,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:15,761 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:15,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 04:33:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:15,976 INFO L255 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 69 conjuncts are in the unsatisfiable core [2024-11-09 04:33:15,979 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:16,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:33:16,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:33:16,095 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:33:16,160 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 04:33:16,160 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 04:33:16,205 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:33:16,213 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:33:16,237 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 04:33:16,237 INFO L378 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 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 04:33:16,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:33:16,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:33:16,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-09 04:33:16,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 04:33:16,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 30 [2024-11-09 04:33:16,394 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-09 04:33:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:16,955 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:17,387 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:17,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 04:33:19,915 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:19,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 37 [2024-11-09 04:33:19,927 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:19,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 254 treesize of output 246 [2024-11-09 04:33:19,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 360 treesize of output 336 [2024-11-09 04:33:20,017 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 249 [2024-11-09 04:33:20,383 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:20,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 26 [2024-11-09 04:33:20,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 140 treesize of output 122 [2024-11-09 04:33:20,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-11-09 04:33:20,417 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:20,418 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 33 [2024-11-09 04:33:21,019 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:21,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323111960] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:33:21,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1477574110] [2024-11-09 04:33:21,022 INFO L159 IcfgInterpreter]: Started Sifa with 30 locations of interest [2024-11-09 04:33:21,022 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:33:21,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:33:21,022 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:33:21,022 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:33:25,900 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 26 for LOIs [2024-11-09 04:33:25,908 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:33:31,232 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25537#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3| Int)) (and (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3|) 0) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3|) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|) 1) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3|) 0) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_3| 4) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_3|)))))' at error location [2024-11-09 04:33:31,232 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:33:31,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:33:31,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 12] total 35 [2024-11-09 04:33:31,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084783890] [2024-11-09 04:33:31,233 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:33:31,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-09 04:33:31,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:31,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-09 04:33:31,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=2682, Unknown=4, NotChecked=0, Total=2862 [2024-11-09 04:33:31,235 INFO L87 Difference]: Start difference. First operand 310 states and 347 transitions. Second operand has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:33:35,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:35,672 INFO L93 Difference]: Finished difference Result 461 states and 503 transitions. [2024-11-09 04:33:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-09 04:33:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 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 46 [2024-11-09 04:33:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:35,674 INFO L225 Difference]: With dead ends: 461 [2024-11-09 04:33:35,674 INFO L226 Difference]: Without dead ends: 461 [2024-11-09 04:33:35,675 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=447, Invalid=6029, Unknown=4, NotChecked=0, Total=6480 [2024-11-09 04:33:35,675 INFO L432 NwaCegarLoop]: 199 mSDtfsCounter, 910 mSDsluCounter, 3859 mSDsCounter, 0 mSdLazyCounter, 2543 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 4058 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:35,675 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [910 Valid, 4058 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2543 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-11-09 04:33:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2024-11-09 04:33:35,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 336. [2024-11-09 04:33:35,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 247 states have (on average 1.465587044534413) internal successors, (362), 333 states have internal predecessors, (362), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:33:35,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 374 transitions. [2024-11-09 04:33:35,681 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 374 transitions. Word has length 46 [2024-11-09 04:33:35,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:35,682 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 374 transitions. [2024-11-09 04:33:35,682 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.3714285714285714) internal successors, (118), 35 states have internal predecessors, (118), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:33:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 374 transitions. [2024-11-09 04:33:35,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-09 04:33:35,683 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:35,683 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:35,706 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 04:33:35,888 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-09 04:33:35,888 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:33:35,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:35,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1053456120, now seen corresponding path program 1 times [2024-11-09 04:33:35,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:35,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796173536] [2024-11-09 04:33:35,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:35,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:35,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:35,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:33:35,991 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:35,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796173536] [2024-11-09 04:33:35,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796173536] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:33:35,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:33:35,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 04:33:35,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315018510] [2024-11-09 04:33:35,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:33:35,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 04:33:35,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:33:35,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 04:33:35,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:33:35,993 INFO L87 Difference]: Start difference. First operand 336 states and 374 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:33:36,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:33:36,185 INFO L93 Difference]: Finished difference Result 335 states and 371 transitions. [2024-11-09 04:33:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 04:33:36,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 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 48 [2024-11-09 04:33:36,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:33:36,186 INFO L225 Difference]: With dead ends: 335 [2024-11-09 04:33:36,186 INFO L226 Difference]: Without dead ends: 335 [2024-11-09 04:33:36,186 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-09 04:33:36,187 INFO L432 NwaCegarLoop]: 187 mSDtfsCounter, 3 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-09 04:33:36,187 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 691 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-09 04:33:36,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2024-11-09 04:33:36,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2024-11-09 04:33:36,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 247 states have (on average 1.45748987854251) internal successors, (360), 332 states have internal predecessors, (360), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:33:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2024-11-09 04:33:36,190 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 48 [2024-11-09 04:33:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:33:36,191 INFO L471 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2024-11-09 04:33:36,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:33:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2024-11-09 04:33:36,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-09 04:33:36,191 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:33:36,191 INFO L215 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:33:36,192 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-11-09 04:33:36,192 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:33:36,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:33:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1947034794, now seen corresponding path program 1 times [2024-11-09 04:33:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:33:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090639643] [2024-11-09 04:33:36,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:36,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:33:36,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:38,058 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:38,058 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:33:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090639643] [2024-11-09 04:33:38,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090639643] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:33:38,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274799367] [2024-11-09 04:33:38,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:33:38,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:33:38,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:33:38,059 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:33:38,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 04:33:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:33:38,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-11-09 04:33:38,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:33:38,291 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:33:38,303 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:33:38,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:33:38,336 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-09 04:33:38,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-09 04:33:38,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 04:33:38,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-09 04:33:38,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2024-11-09 04:33:38,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2024-11-09 04:33:38,463 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-09 04:33:38,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 37 [2024-11-09 04:33:38,469 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 25 [2024-11-09 04:33:38,601 INFO L349 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2024-11-09 04:33:38,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 36 [2024-11-09 04:33:38,720 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:33:38,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2024-11-09 04:33:38,733 INFO L378 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 [2024-11-09 04:33:38,772 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:33:38,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 56 treesize of output 49 [2024-11-09 04:33:38,790 INFO L349 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2024-11-09 04:33:38,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2024-11-09 04:33:38,804 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 5 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 [2024-11-09 04:33:38,888 INFO L378 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 [2024-11-09 04:33:38,905 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-09 04:33:38,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 42 [2024-11-09 04:33:38,948 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 04:33:38,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 44 [2024-11-09 04:33:38,961 INFO L378 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 42 treesize of output 33 [2024-11-09 04:33:40,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:40,315 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:40,338 INFO L349 Elim1Store]: treesize reduction 61, result has 10.3 percent of original size [2024-11-09 04:33:40,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 124 treesize of output 66 [2024-11-09 04:33:40,361 INFO L349 Elim1Store]: treesize reduction 10, result has 41.2 percent of original size [2024-11-09 04:33:40,362 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 25 [2024-11-09 04:33:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:33:40,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 04:33:41,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:41,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2024-11-09 04:33:41,386 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:41,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:33:41,408 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:41,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 43 [2024-11-09 04:33:41,416 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:41,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-09 04:33:43,852 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base|)) (.cse4 (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~node~1#1.offset| 4))) (and (forall ((v_arrayElimArr_11 (Array Int Int)) (v_ArrVal_1889 (Array Int Int)) (|ULTIMATE.start_main_~data~0#1.offset| Int) (v_arrayElimArr_12 (Array Int Int)) (|v_ULTIMATE.start_main_~node~1#1.base_99| Int) (|ULTIMATE.start_main_~data~0#1.base| Int) (v_ArrVal_1881 (Array Int Int)) (v_ArrVal_1880 (Array Int Int)) (v_ArrVal_1890 (Array Int Int)) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_83| Int) (v_ArrVal_1886 Int) (|v_ULTIMATE.start_main_~item~0#1.base_90| Int)) (let ((.cse7 (select v_arrayElimArr_11 4))) (let ((.cse0 (store |c_#valid| .cse7 1)) (.cse1 (select v_arrayElimArr_12 4))) (or (not (= (select (store .cse0 |v_ULTIMATE.start_main_~node~1#1.base_99| v_ArrVal_1886) |v_ULTIMATE.start_main_~item~0#1.base_90|) 0)) (not (= (select .cse0 |v_ULTIMATE.start_main_~node~1#1.base_99|) 0)) (< .cse1 |v_ULTIMATE.start_inspect_before_~shape#1.offset_83|) (< 0 .cse1) (< |v_ULTIMATE.start_inspect_before_~shape#1.offset_83| 0) (not (= v_ArrVal_1880 (store .cse2 .cse3 (select v_ArrVal_1880 .cse3)))) (not (= (store .cse4 .cse3 (select v_ArrVal_1881 .cse3)) v_ArrVal_1881)) (= (let ((.cse5 (store (store (let ((.cse8 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1880))) (store .cse8 .cse7 (store (store (select .cse8 .cse7) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 |ULTIMATE.start_main_~data~0#1.offset|))) |v_ULTIMATE.start_main_~node~1#1.base_99| v_ArrVal_1890) |v_ULTIMATE.start_main_~item~0#1.base_90| v_arrayElimArr_12))) (select (select .cse5 (select (select (store (store (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1881))) (store .cse6 .cse7 (store (store (select .cse6 .cse7) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |ULTIMATE.start_main_~data~0#1.base|))) |v_ULTIMATE.start_main_~node~1#1.base_99| v_ArrVal_1889) |v_ULTIMATE.start_main_~item~0#1.base_90| v_arrayElimArr_11) .cse7) |v_ULTIMATE.start_inspect_before_~shape#1.offset_83|)) (select (select .cse5 .cse7) |v_ULTIMATE.start_inspect_before_~shape#1.offset_83|))) 0) (not (= (select |c_#valid| .cse7) 0)))))) (forall ((v_arrayElimArr_10 (Array Int Int)) (v_ArrVal_1889 (Array Int Int)) (|ULTIMATE.start_main_~data~0#1.offset| Int) (|v_ULTIMATE.start_main_~node~1#1.base_99| Int) (|ULTIMATE.start_main_~data~0#1.base| Int) (v_ArrVal_1881 (Array Int Int)) (v_ArrVal_1880 (Array Int Int)) (v_ArrVal_1890 (Array Int Int)) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_83| Int) (v_ArrVal_1886 Int) (|v_ULTIMATE.start_main_~item~0#1.base_90| Int) (v_arrayElimArr_9 (Array Int Int))) (let ((.cse12 (select v_arrayElimArr_10 4))) (let ((.cse9 (store |c_#valid| .cse12 1)) (.cse10 (select v_arrayElimArr_9 4))) (or (not (= (select (store .cse9 |v_ULTIMATE.start_main_~node~1#1.base_99| v_ArrVal_1886) |v_ULTIMATE.start_main_~item~0#1.base_90|) 0)) (< 0 .cse10) (= (select (let ((.cse11 (store (store (let ((.cse13 (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1881))) (store .cse13 .cse12 (store (store (select .cse13 .cse12) 0 |c_ULTIMATE.start_main_~node~1#1.base|) 4 |ULTIMATE.start_main_~data~0#1.base|))) |v_ULTIMATE.start_main_~node~1#1.base_99| v_ArrVal_1889) |v_ULTIMATE.start_main_~item~0#1.base_90| v_arrayElimArr_10))) (select .cse11 (select (select .cse11 .cse12) |v_ULTIMATE.start_inspect_before_~shape#1.offset_83|))) (select (select (store (store (let ((.cse14 (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_main_~node~1#1.base| v_ArrVal_1880))) (store .cse14 .cse12 (store (store (select .cse14 .cse12) 0 |c_ULTIMATE.start_main_~node~1#1.offset|) 4 |ULTIMATE.start_main_~data~0#1.offset|))) |v_ULTIMATE.start_main_~node~1#1.base_99| v_ArrVal_1890) |v_ULTIMATE.start_main_~item~0#1.base_90| v_arrayElimArr_9) .cse12) |v_ULTIMATE.start_inspect_before_~shape#1.offset_83|)) 0) (not (= (select |c_#valid| .cse12) 0)) (< |v_ULTIMATE.start_inspect_before_~shape#1.offset_83| 0) (not (= v_ArrVal_1880 (store .cse2 .cse3 (select v_ArrVal_1880 .cse3)))) (not (= (select .cse9 |v_ULTIMATE.start_main_~node~1#1.base_99|) 0)) (not (= (store .cse4 .cse3 (select v_ArrVal_1881 .cse3)) v_ArrVal_1881)) (< .cse10 |v_ULTIMATE.start_inspect_before_~shape#1.offset_83|))))))) is different from false [2024-11-09 04:33:43,881 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:43,881 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:43,896 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:43,896 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 186 treesize of output 190 [2024-11-09 04:33:43,905 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:43,906 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:43,979 INFO L349 Elim1Store]: treesize reduction 60, result has 24.1 percent of original size [2024-11-09 04:33:43,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 16684 treesize of output 15368 [2024-11-09 04:33:44,057 INFO L349 Elim1Store]: treesize reduction 20, result has 16.7 percent of original size [2024-11-09 04:33:44,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1246 treesize of output 1170 [2024-11-09 04:33:44,150 INFO L349 Elim1Store]: treesize reduction 36, result has 36.8 percent of original size [2024-11-09 04:33:44,150 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1499 treesize of output 1333 [2024-11-09 04:33:44,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:33:44,652 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:44,653 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:44,722 INFO L349 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2024-11-09 04:33:44,723 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 8926 treesize of output 8584 [2024-11-09 04:33:44,755 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:44,756 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-09 04:33:44,777 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 04:33:44,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3032 treesize of output 2800 [2024-11-09 04:33:44,864 INFO L349 Elim1Store]: treesize reduction 36, result has 36.8 percent of original size [2024-11-09 04:33:44,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1264 treesize of output 1120 [2024-11-09 04:33:44,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:44,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1190 treesize of output 1078 [2024-11-09 04:33:44,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 1131 treesize of output 1097 [2024-11-09 04:33:45,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:45,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 518 treesize of output 514 [2024-11-09 04:33:45,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:45,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 04:33:45,751 INFO L349 Elim1Store]: treesize reduction 36, result has 70.2 percent of original size [2024-11-09 04:33:45,754 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 14163006 treesize of output 13962454 [2024-11-09 04:34:43,101 WARN L286 SmtUtils]: Spent 57.34s on a formula simplification. DAG size of input: 2149 DAG size of output: 434 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:35:07,743 WARN L286 SmtUtils]: Spent 9.21s on a formula simplification. DAG size of input: 389 DAG size of output: 502 (called from [L 728] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-11-09 04:36:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-11-09 04:36:12,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274799367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 04:36:12,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [120341610] [2024-11-09 04:36:12,411 INFO L159 IcfgInterpreter]: Started Sifa with 41 locations of interest [2024-11-09 04:36:12,411 INFO L166 IcfgInterpreter]: Building call graph [2024-11-09 04:36:12,412 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-09 04:36:12,412 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-09 04:36:12,412 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-09 04:36:17,423 INFO L197 IcfgInterpreter]: Interpreting procedure fail with input of size 55 for LOIs [2024-11-09 04:36:17,439 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-09 04:36:24,780 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '27422#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4| Int) (|v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| Int)) (and (= (select |#valid| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) 1) (<= (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 8) (select |#length| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|)) (<= 0 (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) (= (select |#valid| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) 1) (or (not (= |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4| 0)) (not (= |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 0))) (<= 0 |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 4)) 0) (or (not (= (select (select |#memory_$Pointer$.base| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) 0)) (not (= (select (select |#memory_$Pointer$.offset| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|)) 0))) (<= (+ (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) 4) (select |#length| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|))) (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) (+ |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4| 4)) 0) (or (not (= (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) 0)) (not (= (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_inspect_before_~shape#1.base_BEFORE_CALL_4|) |v_ULTIMATE.start_inspect_before_~shape#1.offset_BEFORE_CALL_4|) 0))))))' at error location [2024-11-09 04:36:24,780 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-09 04:36:24,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 04:36:24,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 15, 16] total 41 [2024-11-09 04:36:24,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975901950] [2024-11-09 04:36:24,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 04:36:24,781 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-09 04:36:24,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:24,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-09 04:36:24,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=4024, Unknown=10, NotChecked=128, Total=4422 [2024-11-09 04:36:24,784 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 41 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 41 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:36:32,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:32,851 INFO L93 Difference]: Finished difference Result 384 states and 417 transitions. [2024-11-09 04:36:32,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-09 04:36:32,852 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 41 states have internal predecessors, (129), 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 50 [2024-11-09 04:36:32,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:32,853 INFO L225 Difference]: With dead ends: 384 [2024-11-09 04:36:32,853 INFO L226 Difference]: Without dead ends: 384 [2024-11-09 04:36:32,854 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=521, Invalid=6279, Unknown=10, NotChecked=162, Total=6972 [2024-11-09 04:36:32,855 INFO L432 NwaCegarLoop]: 204 mSDtfsCounter, 695 mSDsluCounter, 4187 mSDsCounter, 0 mSdLazyCounter, 2967 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 4391 SdHoareTripleChecker+Invalid, 3245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 261 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:32,855 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 4391 Invalid, 3245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2967 Invalid, 0 Unknown, 261 Unchecked, 5.4s Time] [2024-11-09 04:36:32,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2024-11-09 04:36:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 336. [2024-11-09 04:36:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 248 states have (on average 1.4556451612903225) internal successors, (361), 333 states have internal predecessors, (361), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:36:32,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 372 transitions. [2024-11-09 04:36:32,861 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 372 transitions. Word has length 50 [2024-11-09 04:36:32,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:32,861 INFO L471 AbstractCegarLoop]: Abstraction has 336 states and 372 transitions. [2024-11-09 04:36:32,861 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.1463414634146343) internal successors, (129), 41 states have internal predecessors, (129), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:36:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 372 transitions. [2024-11-09 04:36:32,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-09 04:36:32,862 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:32,862 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:32,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-09 04:36:33,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:33,067 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr82ASSERT_VIOLATIONMEMORY_FREE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:36:33,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:33,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1666372674, now seen corresponding path program 1 times [2024-11-09 04:36:33,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:33,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953752158] [2024-11-09 04:36:33,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:33,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:33,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:33,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 04:36:33,135 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:33,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953752158] [2024-11-09 04:36:33,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953752158] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 04:36:33,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 04:36:33,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 04:36:33,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624863209] [2024-11-09 04:36:33,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 04:36:33,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 04:36:33,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-09 04:36:33,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 04:36:33,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 04:36:33,137 INFO L87 Difference]: Start difference. First operand 336 states and 372 transitions. Second operand has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:36:33,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-09 04:36:33,280 INFO L93 Difference]: Finished difference Result 342 states and 374 transitions. [2024-11-09 04:36:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 04:36:33,281 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2024-11-09 04:36:33,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-09 04:36:33,282 INFO L225 Difference]: With dead ends: 342 [2024-11-09 04:36:33,282 INFO L226 Difference]: Without dead ends: 342 [2024-11-09 04:36:33,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-09 04:36:33,283 INFO L432 NwaCegarLoop]: 185 mSDtfsCounter, 40 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-09 04:36:33,283 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 486 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-09 04:36:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-11-09 04:36:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 337. [2024-11-09 04:36:33,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 249 states have (on average 1.4538152610441768) internal successors, (362), 334 states have internal predecessors, (362), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-11-09 04:36:33,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 373 transitions. [2024-11-09 04:36:33,289 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 373 transitions. Word has length 49 [2024-11-09 04:36:33,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-09 04:36:33,289 INFO L471 AbstractCegarLoop]: Abstraction has 337 states and 373 transitions. [2024-11-09 04:36:33,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 16.333333333333332) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 04:36:33,289 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 373 transitions. [2024-11-09 04:36:33,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-09 04:36:33,290 INFO L207 NwaCegarLoop]: Found error trace [2024-11-09 04:36:33,290 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 04:36:33,290 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-11-09 04:36:33,290 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, merge_single_nodeErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, merge_single_nodeErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 102 more)] === [2024-11-09 04:36:33,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 04:36:33,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1039577750, now seen corresponding path program 1 times [2024-11-09 04:36:33,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-09 04:36:33,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834264911] [2024-11-09 04:36:33,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:33,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 04:36:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:34,755 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 04:36:34,755 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-09 04:36:34,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834264911] [2024-11-09 04:36:34,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834264911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 04:36:34,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992057904] [2024-11-09 04:36:34,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 04:36:34,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 04:36:34,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 [2024-11-09 04:36:34,757 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 04:36:34,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_878dc7fa-5ab4-446f-be4d-e671e5fec0c0/bin/utaipan-verify-YMUCfTKeje/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 04:36:35,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 04:36:35,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-09 04:36:35,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 04:36:35,012 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 04:36:35,036 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 04:36:35,036 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 04:36:35,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 04:36:35,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2024-11-09 04:36:35,150 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-09 04:36:35,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-09 04:36:35,225 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:36:35,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 23 [2024-11-09 04:36:35,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:36:35,397 INFO L349 Elim1Store]: treesize reduction 42, result has 60.4 percent of original size [2024-11-09 04:36:35,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 96 [2024-11-09 04:36:35,422 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-09 04:36:35,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 65 [2024-11-09 04:36:35,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:36:35,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 57 [2024-11-09 04:36:35,906 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2024-11-09 04:36:35,920 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2024-11-09 04:36:36,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-09 04:36:36,344 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2024-11-09 04:36:36,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 328 treesize of output 300 [2024-11-09 04:36:37,542 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-09 04:36:37,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 611 treesize of output 494 [2024-11-09 04:36:37,851 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11