./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-simple/dll2n_update_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2 --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:28:15,595 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:28:15,720 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:28:15,724 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:28:15,725 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:28:15,776 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:28:15,781 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:28:15,782 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:28:15,782 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:28:15,783 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:28:15,783 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:28:15,787 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:28:15,787 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:28:15,788 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:28:15,788 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:28:15,788 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:28:15,789 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:28:15,789 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:28:15,794 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:28:15,794 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:28:15,795 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:28:15,799 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:28:15,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:28:15,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:28:15,803 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:28:15,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:28:15,803 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:28:15,804 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:28:15,804 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:28:15,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:28:15,809 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:28:15,810 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:28:15,810 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:28:15,810 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:28:15,811 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:28:15,811 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:28:15,811 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:28:15,812 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:28:15,812 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:15,812 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:28:15,816 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:28:15,817 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:28:15,817 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:28:15,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:28:15,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:28:15,819 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:28:15,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:28:15,820 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_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 [2024-11-02 12:28:16,113 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:28:16,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:28:16,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:28:16,152 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:28:16,152 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:28:16,154 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/list-simple/dll2n_update_all.i Unable to find full path for "g++" [2024-11-02 12:28:18,514 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:28:18,868 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:28:18,869 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/sv-benchmarks/c/list-simple/dll2n_update_all.i [2024-11-02 12:28:18,892 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/data/015175f22/85513c81cf1148cda411abf24af847c4/FLAG1ea3240df [2024-11-02 12:28:19,092 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/data/015175f22/85513c81cf1148cda411abf24af847c4 [2024-11-02 12:28:19,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:28:19,100 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:28:19,102 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:19,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:28:19,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:28:19,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,123 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a3af038 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19, skipping insertion in model container [2024-11-02 12:28:19,123 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,184 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:28:19,617 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2024-11-02 12:28:19,627 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:19,642 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:28:19,706 WARN L251 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2024-11-02 12:28:19,707 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:28:19,746 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:28:19,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19 WrapperNode [2024-11-02 12:28:19,747 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:28:19,748 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:19,749 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:28:19,749 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:28:19,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,773 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,796 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 115 [2024-11-02 12:28:19,796 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:28:19,797 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:28:19,797 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:28:19,798 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:28:19,811 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,812 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,829 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,835 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,837 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,838 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,841 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:28:19,845 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:28:19,845 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:28:19,846 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:28:19,846 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (1/1) ... [2024-11-02 12:28:19,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:28:19,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:19,882 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:28:19,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:28:19,918 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2024-11-02 12:28:19,919 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2024-11-02 12:28:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-02 12:28:19,919 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-02 12:28:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-02 12:28:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:28:19,921 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2024-11-02 12:28:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2024-11-02 12:28:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-02 12:28:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:28:19,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:28:19,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:28:20,109 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:28:20,116 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:28:20,148 INFO L735 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2024-11-02 12:28:20,370 INFO L? ?]: Removed 41 outVars from TransFormulas that were not future-live. [2024-11-02 12:28:20,370 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:28:20,479 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:28:20,480 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-02 12:28:20,481 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:20 BoogieIcfgContainer [2024-11-02 12:28:20,481 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:28:20,484 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:28:20,485 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:28:20,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:28:20,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:28:19" (1/3) ... [2024-11-02 12:28:20,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad0cc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:20, skipping insertion in model container [2024-11-02 12:28:20,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:28:19" (2/3) ... [2024-11-02 12:28:20,493 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ad0cc6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:28:20, skipping insertion in model container [2024-11-02 12:28:20,493 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:28:20" (3/3) ... [2024-11-02 12:28:20,495 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2024-11-02 12:28:20,516 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:28:20,516 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:28:20,593 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:28:20,601 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=LoopHeads, 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;@35f873c9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:28:20,601 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:28:20,606 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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) [2024-11-02 12:28:20,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-02 12:28:20,615 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:20,615 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:20,616 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:20,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:20,622 INFO L85 PathProgramCache]: Analyzing trace with hash 1570243634, now seen corresponding path program 1 times [2024-11-02 12:28:20,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:20,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374758019] [2024-11-02 12:28:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:20,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:20,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:20,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:20,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374758019] [2024-11-02 12:28:20,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374758019] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:20,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:20,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-02 12:28:20,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364332141] [2024-11-02 12:28:20,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:20,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-02 12:28:20,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:21,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-02 12:28:21,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-02 12:28:21,025 INFO L87 Difference]: Start difference. First operand has 17 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 15 states have internal predecessors, (23), 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) 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) [2024-11-02 12:28:21,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:21,128 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2024-11-02 12:28:21,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-02 12:28:21,131 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 [2024-11-02 12:28:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:21,139 INFO L225 Difference]: With dead ends: 31 [2024-11-02 12:28:21,139 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:28:21,142 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 [2024-11-02 12:28:21,146 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:21,147 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 24 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:21,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:28:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2024-11-02 12:28:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2024-11-02 12:28:21,185 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2024-11-02 12:28:21,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:21,186 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2024-11-02 12:28:21,186 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) [2024-11-02 12:28:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2024-11-02 12:28:21,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-02 12:28:21,187 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:21,187 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:21,188 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:28:21,188 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:21,189 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:21,189 INFO L85 PathProgramCache]: Analyzing trace with hash 299858783, now seen corresponding path program 1 times [2024-11-02 12:28:21,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:21,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297189771] [2024-11-02 12:28:21,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:21,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:21,431 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:21,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297189771] [2024-11-02 12:28:21,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297189771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:21,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911804397] [2024-11-02 12:28:21,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:21,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:21,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:21,435 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:21,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:28:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:21,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:28:21,569 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:21,647 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:21,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:21,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911804397] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:21,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [985803705] [2024-11-02 12:28:21,716 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2024-11-02 12:28:21,717 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:21,722 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:21,729 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:21,729 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:22,603 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:22,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [985803705] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:22,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:22,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2024-11-02 12:28:22,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718994549] [2024-11-02 12:28:22,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:22,733 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:28:22,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:22,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:28:22,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:28:22,734 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:22,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:22,803 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2024-11-02 12:28:22,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:28:22,804 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-02 12:28:22,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:22,805 INFO L225 Difference]: With dead ends: 19 [2024-11-02 12:28:22,805 INFO L226 Difference]: Without dead ends: 14 [2024-11-02 12:28:22,805 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:28:22,806 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:22,807 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 13 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:22,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-02 12:28:22,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2024-11-02 12:28:22,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:22,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2024-11-02 12:28:22,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2024-11-02 12:28:22,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:22,811 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2024-11-02 12:28:22,812 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:22,812 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2024-11-02 12:28:22,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-11-02 12:28:22,812 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:22,813 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:22,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-02 12:28:23,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-02 12:28:23,017 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:23,018 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1448453533, now seen corresponding path program 1 times [2024-11-02 12:28:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:23,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699563588] [2024-11-02 12:28:23,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:28:23,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699563588] [2024-11-02 12:28:23,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699563588] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:23,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398655308] [2024-11-02 12:28:23,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:23,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:23,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:23,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:23,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:28:23,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:23,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:28:23,260 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:28:23,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:23,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:28:23,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398655308] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:23,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [571848152] [2024-11-02 12:28:23,303 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:28:23,303 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:23,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:23,307 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:23,308 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:23,911 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:24,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [571848152] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:24,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:24,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2024-11-02 12:28:24,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948573116] [2024-11-02 12:28:24,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:24,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:28:24,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:24,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:28:24,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2024-11-02 12:28:24,231 INFO L87 Difference]: Start difference. First operand 13 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:24,433 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2024-11-02 12:28:24,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:28:24,434 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2024-11-02 12:28:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:24,435 INFO L225 Difference]: With dead ends: 21 [2024-11-02 12:28:24,435 INFO L226 Difference]: Without dead ends: 16 [2024-11-02 12:28:24,435 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=21, Invalid=50, Unknown=1, NotChecked=0, Total=72 [2024-11-02 12:28:24,437 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 2 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:24,437 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:28:24,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-02 12:28:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2024-11-02 12:28:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2024-11-02 12:28:24,443 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2024-11-02 12:28:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:24,443 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2024-11-02 12:28:24,443 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2024-11-02 12:28:24,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-02 12:28:24,444 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:24,444 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:24,466 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-02 12:28:24,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-02 12:28:24,646 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:24,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:24,646 INFO L85 PathProgramCache]: Analyzing trace with hash 474531345, now seen corresponding path program 1 times [2024-11-02 12:28:24,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:24,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292541448] [2024-11-02 12:28:24,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:24,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:28:24,800 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:24,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292541448] [2024-11-02 12:28:24,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292541448] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:24,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349275985] [2024-11-02 12:28:24,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:24,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:24,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:24,804 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:24,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-02 12:28:24,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:24,957 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-02 12:28:24,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:28:24,980 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:25,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:28:25,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349275985] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:25,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721955264] [2024-11-02 12:28:25,005 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:28:25,005 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:25,005 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:25,006 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:25,006 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:25,794 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:28,965 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '407#(and (= |ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_59| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~i~0#1_59| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_ULTIMATE.start_dll_update_at_~head#1.base_31| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_31| Int) (|v_#memory_$Pointer$.base_65| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.offset_65| (Array Int (Array Int Int))) (|v_#memory_int_78| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_65| |v_ULTIMATE.start_dll_update_at_~head#1.base_31| (store (select |v_#memory_$Pointer$.base_65| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31|))) |#memory_$Pointer$.base|) (or (= |v_ULTIMATE.start_dll_update_at_~head#1.offset_31| 0) (= 3 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31|))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_65| |v_ULTIMATE.start_dll_update_at_~head#1.base_31| (store (select |v_#memory_$Pointer$.offset_65| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31|) 3) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31|)) (= |#memory_int| (store |v_#memory_int_78| |v_ULTIMATE.start_dll_update_at_~head#1.base_31| (store (select |v_#memory_int_78| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_31|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_31|)))))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483647) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_main_~len~0#1|)))' at error location [2024-11-02 12:28:28,965 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:28,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:28,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2024-11-02 12:28:28,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661077437] [2024-11-02 12:28:28,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:28,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:28:28,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:28,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:28:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=120, Unknown=2, NotChecked=0, Total=156 [2024-11-02 12:28:28,968 INFO L87 Difference]: Start difference. First operand 14 states and 19 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:29,026 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2024-11-02 12:28:29,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:28:29,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-02 12:28:29,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:29,028 INFO L225 Difference]: With dead ends: 26 [2024-11-02 12:28:29,028 INFO L226 Difference]: Without dead ends: 17 [2024-11-02 12:28:29,028 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=34, Invalid=120, Unknown=2, NotChecked=0, Total=156 [2024-11-02 12:28:29,029 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:29,030 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:29,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-02 12:28:29,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-02 12:28:29,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:29,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-11-02 12:28:29,041 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 13 [2024-11-02 12:28:29,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:29,041 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-11-02 12:28:29,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:29,042 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-11-02 12:28:29,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-02 12:28:29,042 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:29,043 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:29,065 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:29,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-02 12:28:29,244 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:29,244 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:29,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1856804994, now seen corresponding path program 2 times [2024-11-02 12:28:29,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:29,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261807497] [2024-11-02 12:28:29,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:29,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:29,427 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:28:29,428 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:29,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261807497] [2024-11-02 12:28:29,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261807497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:29,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:29,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:28:29,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607658800] [2024-11-02 12:28:29,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:29,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:28:29,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:28:29,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:28:29,430 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2024-11-02 12:28:29,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:29,501 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2024-11-02 12:28:29,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:28:29,502 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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 16 [2024-11-02 12:28:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:29,502 INFO L225 Difference]: With dead ends: 31 [2024-11-02 12:28:29,502 INFO L226 Difference]: Without dead ends: 24 [2024-11-02 12:28:29,503 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 [2024-11-02 12:28:29,503 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:29,504 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-11-02 12:28:29,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2024-11-02 12:28:29,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 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) [2024-11-02 12:28:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2024-11-02 12:28:29,513 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 16 [2024-11-02 12:28:29,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:29,513 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2024-11-02 12:28:29,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2024-11-02 12:28:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2024-11-02 12:28:29,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-02 12:28:29,514 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:29,514 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:29,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:28:29,514 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:29,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:29,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1814988096, now seen corresponding path program 3 times [2024-11-02 12:28:29,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:29,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355068468] [2024-11-02 12:28:29,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:30,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:30,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355068468] [2024-11-02 12:28:30,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355068468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:30,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862938740] [2024-11-02 12:28:30,886 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:28:30,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:30,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:30,900 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:30,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-02 12:28:31,297 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:28:31,298 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:31,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-02 12:28:31,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:31,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:28:31,413 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 12:28:31,414 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 [2024-11-02 12:28:31,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:28:31,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 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 23 [2024-11-02 12:28:31,487 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-02 12:28:31,487 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 49 [2024-11-02 12:28:31,497 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 1 [2024-11-02 12:28:31,674 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:31,675 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 1 case distinctions, treesize of input 39 treesize of output 26 [2024-11-02 12:28:31,688 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 [2024-11-02 12:28:31,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-02 12:28:31,882 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 [2024-11-02 12:28:31,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-02 12:28:31,998 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:31,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:32,049 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_340 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_340) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2024-11-02 12:28:32,129 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_340 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_340) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2024-11-02 12:28:34,312 WARN L851 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~len~0#1| Int) (v_ArrVal_340 (Array Int Int))) (= |ULTIMATE.start_main_~len~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_create_~head~0#1.base|) |c_ULTIMATE.start_dll_create_~head~0#1.offset| |ULTIMATE.start_main_~len~0#1|)) (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_create_~head~0#1.base|) (+ |c_ULTIMATE.start_dll_create_~head~0#1.offset| 4)) v_ArrVal_340) |c_ULTIMATE.start_dll_create_~head~0#1.base|) |c_ULTIMATE.start_dll_create_~head~0#1.offset|))) is different from false [2024-11-02 12:28:34,368 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2024-11-02 12:28:34,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 105 [2024-11-02 12:28:34,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:34,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 98 [2024-11-02 12:28:34,443 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 9 treesize of output 1 [2024-11-02 12:28:34,459 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:34,459 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 24 treesize of output 25 [2024-11-02 12:28:34,469 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 42 treesize of output 38 [2024-11-02 12:28:34,482 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:34,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 35 [2024-11-02 12:28:34,488 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 26 treesize of output 22 [2024-11-02 12:28:34,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:34,498 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 39 treesize of output 27 [2024-11-02 12:28:34,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:28:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2024-11-02 12:28:34,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862938740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:34,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991860600] [2024-11-02 12:28:34,600 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:28:34,600 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:34,601 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:34,601 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:34,601 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:35,192 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:36,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '703#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483648)) (exists ((|v_ULTIMATE.start_main_~i~0#1_68| Int)) (and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_dll_update_at_~head#1.base_44| Int) (|v_#memory_$Pointer$.offset_83| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_42| Int) (|v_#memory_int_104| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_84| (Array Int (Array Int Int)))) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42|) 3) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_84| |v_ULTIMATE.start_dll_update_at_~head#1.base_44| (store (select |v_#memory_$Pointer$.base_84| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42|)) (= |#memory_int| (store |v_#memory_int_104| |v_ULTIMATE.start_dll_update_at_~head#1.base_44| (store (select |v_#memory_int_104| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_83| |v_ULTIMATE.start_dll_update_at_~head#1.base_44| (store (select |v_#memory_$Pointer$.offset_83| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_44|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_42|)))))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |v_ULTIMATE.start_main_~i~0#1_68| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (<= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483647) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_main_~len~0#1|)))' at error location [2024-11-02 12:28:36,645 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:36,646 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:36,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 35 [2024-11-02 12:28:36,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735418091] [2024-11-02 12:28:36,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:36,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-02 12:28:36,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:36,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-02 12:28:36,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1414, Unknown=26, NotChecked=234, Total=1806 [2024-11-02 12:28:36,649 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:37,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:37,633 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2024-11-02 12:28:37,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-02 12:28:37,634 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-02 12:28:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:37,635 INFO L225 Difference]: With dead ends: 41 [2024-11-02 12:28:37,635 INFO L226 Difference]: Without dead ends: 39 [2024-11-02 12:28:37,637 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=218, Invalid=2024, Unknown=26, NotChecked=282, Total=2550 [2024-11-02 12:28:37,641 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 87 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:37,642 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 115 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 444 Invalid, 0 Unknown, 121 Unchecked, 0.6s Time] [2024-11-02 12:28:37,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-02 12:28:37,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 27. [2024-11-02 12:28:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:37,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-11-02 12:28:37,651 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2024-11-02 12:28:37,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:37,652 INFO L471 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-11-02 12:28:37,652 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 35 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:37,652 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-11-02 12:28:37,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:28:37,653 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:37,653 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:37,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:37,855 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-02 12:28:37,856 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:37,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1047799090, now seen corresponding path program 4 times [2024-11-02 12:28:37,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:37,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113553850] [2024-11-02 12:28:37,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:37,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:28:38,005 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:38,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113553850] [2024-11-02 12:28:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113553850] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:38,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785784396] [2024-11-02 12:28:38,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-02 12:28:38,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:38,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:38,008 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:38,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-02 12:28:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:38,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:28:38,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:38,191 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:28:38,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:28:38,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785784396] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:38,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [562421238] [2024-11-02 12:28:38,223 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:28:38,223 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:38,224 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:38,224 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:38,224 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:39,505 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:40,509 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '952#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483647) (exists ((|v_ULTIMATE.start_main_~i~0#1_79| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~i~0#1_79| 2) (exists ((|v_#memory_$Pointer$.offset_97| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_98| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.base_57| Int) (|v_#memory_int_122| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_55| Int)) (and (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55|)) (= |#memory_int| (store |v_#memory_int_122| |v_ULTIMATE.start_dll_update_at_~head#1.base_57| (store (select |v_#memory_int_122| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55|)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_dll_update_at_~head#1.base_57| (store (select |v_#memory_$Pointer$.base_98| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_97| |v_ULTIMATE.start_dll_update_at_~head#1.base_57| (store (select |v_#memory_$Pointer$.offset_97| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_57|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_55|) 3))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_main_~len~0#1|)))' at error location [2024-11-02 12:28:40,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:40,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:40,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-11-02 12:28:40,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263497419] [2024-11-02 12:28:40,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:40,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-02 12:28:40,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:40,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-02 12:28:40,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2024-11-02 12:28:40,512 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:40,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:40,661 INFO L93 Difference]: Finished difference Result 46 states and 63 transitions. [2024-11-02 12:28:40,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-02 12:28:40,662 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-02 12:28:40,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:40,663 INFO L225 Difference]: With dead ends: 46 [2024-11-02 12:28:40,663 INFO L226 Difference]: Without dead ends: 39 [2024-11-02 12:28:40,663 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:28:40,664 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:40,664 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:40,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-02 12:28:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2024-11-02 12:28:40,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:40,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-11-02 12:28:40,674 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2024-11-02 12:28:40,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:40,674 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-11-02 12:28:40,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:40,674 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-11-02 12:28:40,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:28:40,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:40,675 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:40,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-02 12:28:40,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-02 12:28:40,876 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:40,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:40,877 INFO L85 PathProgramCache]: Analyzing trace with hash 428634211, now seen corresponding path program 1 times [2024-11-02 12:28:40,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469848001] [2024-11-02 12:28:40,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:40,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:40,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:41,030 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:41,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469848001] [2024-11-02 12:28:41,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469848001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:41,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:28:41,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:28:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495796112] [2024-11-02 12:28:41,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:41,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:28:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:41,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:28:41,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:28:41,032 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:41,117 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2024-11-02 12:28:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:28:41,118 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2024-11-02 12:28:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:41,118 INFO L225 Difference]: With dead ends: 39 [2024-11-02 12:28:41,118 INFO L226 Difference]: Without dead ends: 34 [2024-11-02 12:28:41,119 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 [2024-11-02 12:28:41,121 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:41,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 17 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:41,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-02 12:28:41,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2024-11-02 12:28:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) [2024-11-02 12:28:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2024-11-02 12:28:41,134 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 19 [2024-11-02 12:28:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:41,134 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2024-11-02 12:28:41,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-02 12:28:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 12:28:41,135 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:41,135 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:41,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:28:41,135 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:41,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:41,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1493809982, now seen corresponding path program 5 times [2024-11-02 12:28:41,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:41,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875972671] [2024-11-02 12:28:41,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:41,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:41,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:28:41,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875972671] [2024-11-02 12:28:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875972671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612948902] [2024-11-02 12:28:41,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-02 12:28:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:41,318 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:41,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-02 12:28:41,499 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-02 12:28:41,500 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:41,502 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-02 12:28:41,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:41,566 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:41,566 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:28:41,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612948902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:28:41,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:28:41,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2024-11-02 12:28:41,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549474922] [2024-11-02 12:28:41,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:28:41,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:28:41,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:41,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:28:41,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-11-02 12:28:41,569 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:41,650 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-11-02 12:28:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-02 12:28:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-02 12:28:41,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:41,651 INFO L225 Difference]: With dead ends: 45 [2024-11-02 12:28:41,651 INFO L226 Difference]: Without dead ends: 38 [2024-11-02 12:28:41,651 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-11-02 12:28:41,652 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 19 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:41,652 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 15 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:41,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-02 12:28:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2024-11-02 12:28:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 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) [2024-11-02 12:28:41,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-11-02 12:28:41,662 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 20 [2024-11-02 12:28:41,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:41,662 INFO L471 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-11-02 12:28:41,662 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:41,662 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-11-02 12:28:41,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-02 12:28:41,663 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:41,663 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:41,685 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-02 12:28:41,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-02 12:28:41,868 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:41,868 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:41,868 INFO L85 PathProgramCache]: Analyzing trace with hash -54969726, now seen corresponding path program 6 times [2024-11-02 12:28:41,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:41,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852905714] [2024-11-02 12:28:41,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:41,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:41,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:42,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:28:42,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852905714] [2024-11-02 12:28:42,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852905714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:42,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926847405] [2024-11-02 12:28:42,023 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-02 12:28:42,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:42,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:42,025 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:42,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-02 12:28:42,214 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-02 12:28:42,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-02 12:28:42,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:28:42,218 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:28:42,260 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:28:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926847405] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:42,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1601062317] [2024-11-02 12:28:42,300 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:28:42,301 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:42,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:42,301 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:42,301 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:43,001 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:44,004 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1532#(and (exists ((|v_ULTIMATE.start_main_~i~0#1_93| Int)) (and (<= 1 |#StackHeapBarrier|) (= |v_ULTIMATE.start_main_~i~0#1_93| 2) (= |ULTIMATE.start_main_~len~0#1| 2) (exists ((|v_#memory_$Pointer$.offset_118| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_119| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.base_70| Int) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_68| Int) (|v_#memory_int_153| (Array Int (Array Int Int)))) (and (= (store |v_#memory_int_153| |v_ULTIMATE.start_dll_update_at_~head#1.base_70| (store (select |v_#memory_int_153| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68|))) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_118| |v_ULTIMATE.start_dll_update_at_~head#1.base_70| (store (select |v_#memory_$Pointer$.offset_118| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68|) 3) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_119| |v_ULTIMATE.start_dll_update_at_~head#1.base_70| (store (select |v_#memory_$Pointer$.base_119| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_70|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_68|)))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483647) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_main_~len~0#1|)))' at error location [2024-11-02 12:28:44,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:44,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:44,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-02 12:28:44,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972609057] [2024-11-02 12:28:44,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:44,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-02 12:28:44,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-02 12:28:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-11-02 12:28:44,006 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:44,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:44,173 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2024-11-02 12:28:44,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:28:44,174 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-02 12:28:44,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:44,174 INFO L225 Difference]: With dead ends: 43 [2024-11-02 12:28:44,174 INFO L226 Difference]: Without dead ends: 22 [2024-11-02 12:28:44,175 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2024-11-02 12:28:44,176 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:44,176 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 21 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:44,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-02 12:28:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-02 12:28:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-02 12:28:44,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2024-11-02 12:28:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:44,183 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-02 12:28:44,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-02 12:28:44,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-02 12:28:44,184 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:44,185 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:44,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-02 12:28:44,385 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-02 12:28:44,386 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:44,386 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash 995539652, now seen corresponding path program 1 times [2024-11-02 12:28:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:44,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158107445] [2024-11-02 12:28:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:44,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:44,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:44,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:44,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:44,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158107445] [2024-11-02 12:28:44,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158107445] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:44,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80429997] [2024-11-02 12:28:44,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:44,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:44,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:44,492 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:44,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-02 12:28:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:44,664 INFO L255 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-02 12:28:44,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:44,683 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:44,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-02 12:28:44,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80429997] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:28:44,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [48189410] [2024-11-02 12:28:44,710 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2024-11-02 12:28:44,711 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:28:44,711 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:28:44,711 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:28:44,711 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:28:45,163 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-02 12:28:46,391 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1780#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483648)) (<= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) 2147483647) (exists ((|v_ULTIMATE.start_main_~i~0#1_101| Int)) (and (<= 1 |#StackHeapBarrier|) (= 2 |v_ULTIMATE.start_main_~i~0#1_101|) (exists ((|v_ULTIMATE.start_dll_update_at_~head#1.base_77| Int) (|v_#memory_$Pointer$.base_130| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_75| Int) (|v_#memory_$Pointer$.offset_129| (Array Int (Array Int Int))) (|v_#memory_int_168| (Array Int (Array Int Int)))) (and (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75|) 3) (= (store |v_#memory_$Pointer$.base_130| |v_ULTIMATE.start_dll_update_at_~head#1.base_77| (store (select |v_#memory_$Pointer$.base_130| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75|))) |#memory_$Pointer$.base|) (= (store |v_#memory_int_168| |v_ULTIMATE.start_dll_update_at_~head#1.base_77| (store (select |v_#memory_int_168| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75|))) |#memory_int|) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_129| |v_ULTIMATE.start_dll_update_at_~head#1.base_77| (store (select |v_#memory_$Pointer$.offset_129| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_77|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_75|)))))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_main_~len~0#1|)))' at error location [2024-11-02 12:28:46,391 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-02 12:28:46,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-02 12:28:46,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2024-11-02 12:28:46,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138540295] [2024-11-02 12:28:46,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-02 12:28:46,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:28:46,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:28:46,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:28:46,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=137, Unknown=2, NotChecked=0, Total=182 [2024-11-02 12:28:46,393 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:46,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:28:46,486 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2024-11-02 12:28:46,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:28:46,486 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-02 12:28:46,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:28:46,487 INFO L225 Difference]: With dead ends: 26 [2024-11-02 12:28:46,487 INFO L226 Difference]: Without dead ends: 23 [2024-11-02 12:28:46,487 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=48, Invalid=160, Unknown=2, NotChecked=0, Total=210 [2024-11-02 12:28:46,488 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:28:46,488 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:28:46,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-02 12:28:46,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-02 12:28:46,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 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) [2024-11-02 12:28:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-02 12:28:46,496 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2024-11-02 12:28:46,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:28:46,496 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-02 12:28:46,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-02 12:28:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-02 12:28:46,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-02 12:28:46,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:28:46,497 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:28:46,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-02 12:28:46,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-02 12:28:46,698 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:28:46,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:28:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 795536223, now seen corresponding path program 1 times [2024-11-02 12:28:46,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:28:46,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270187300] [2024-11-02 12:28:46,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:46,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:28:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:48,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:48,358 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:28:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270187300] [2024-11-02 12:28:48,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270187300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:28:48,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393207791] [2024-11-02 12:28:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:28:48,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:28:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:28:48,361 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:28:48,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b08f193-dbe8-496f-a94f-fad863585d1c/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-02 12:28:48,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:28:48,556 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-02 12:28:48,561 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:28:48,598 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-02 12:28:48,700 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-02 12:28:48,700 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 [2024-11-02 12:28:48,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 27 [2024-11-02 12:28:48,800 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-02 12:28:48,803 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 84 [2024-11-02 12:28:48,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:28:49,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:28:49,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-02 12:28:49,062 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:49,063 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 1 case distinctions, treesize of input 45 treesize of output 30 [2024-11-02 12:28:49,335 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2024-11-02 12:28:49,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 88 [2024-11-02 12:28:49,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 19 [2024-11-02 12:28:49,350 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 40 treesize of output 23 [2024-11-02 12:28:49,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 28 [2024-11-02 12:28:49,737 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 23 treesize of output 11 [2024-11-02 12:28:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:28:49,858 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:28:50,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 64 [2024-11-02 12:28:50,238 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-02 12:28:50,238 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 50 treesize of output 43 [2024-11-02 12:28:50,243 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 17 treesize of output 13