./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 30e01a73 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_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/list-simple/dll2n_update_all.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire --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 0.2.3-dev-30e01a7 [2023-11-23 20:35:27,601 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:35:27,760 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:35:27,767 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:35:27,770 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:35:27,829 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:35:27,830 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:35:27,831 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:35:27,832 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:35:27,833 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:35:27,834 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:35:27,835 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:35:27,835 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:35:27,836 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:35:27,837 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:35:27,837 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:35:27,838 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:35:27,839 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:35:27,839 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:35:27,840 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:35:27,841 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:35:27,842 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:35:27,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:35:27,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:35:27,844 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:35:27,845 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:35:27,845 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:35:27,846 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:35:27,846 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:35:27,847 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:35:27,847 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:35:27,848 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:35:27,848 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:35:27,849 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:35:27,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:35:27,859 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:35:27,859 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:35:27,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:27,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:35:27,861 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:35:27,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:35:27,861 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:35:27,862 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:35:27,862 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:35:27,862 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:35:27,863 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:35:27,863 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:35:27,863 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_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c46cc56772f2c3f0b073640343b328fb3b128ed13803ffe5a04f6290fe624494 [2023-11-23 20:35:28,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:35:28,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:35:28,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:35:28,246 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:35:28,246 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:35:28,248 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/list-simple/dll2n_update_all.i [2023-11-23 20:35:31,318 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:35:31,739 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:35:31,745 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/sv-benchmarks/c/list-simple/dll2n_update_all.i [2023-11-23 20:35:31,775 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/data/b82c2d135/f265ed4ae1bf433385af7a0e18cc1638/FLAG5498b307b [2023-11-23 20:35:31,802 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/data/b82c2d135/f265ed4ae1bf433385af7a0e18cc1638 [2023-11-23 20:35:31,808 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:35:31,810 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:35:31,812 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:35:31,813 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:35:31,819 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:35:31,820 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:31" (1/1) ... [2023-11-23 20:35:31,821 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ffd8c5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:31, skipping insertion in model container [2023-11-23 20:35:31,821 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:35:31" (1/1) ... [2023-11-23 20:35:31,888 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:35:32,319 WARN L240 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_697fe892-fec8-4509-84d2-c944f014a37b/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2023-11-23 20:35:32,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:35:32,344 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:35:32,411 WARN L240 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_697fe892-fec8-4509-84d2-c944f014a37b/sv-benchmarks/c/list-simple/dll2n_update_all.i[24455,24468] [2023-11-23 20:35:32,412 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:35:32,453 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:35:32,454 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32 WrapperNode [2023-11-23 20:35:32,454 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:35:32,455 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:35:32,456 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:35:32,456 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:35:32,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,490 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,518 INFO L138 Inliner]: procedures = 126, calls = 27, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 114 [2023-11-23 20:35:32,519 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:35:32,520 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:35:32,520 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:35:32,520 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:35:32,546 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,546 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,550 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,551 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,561 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,566 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,569 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,571 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,581 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:35:32,582 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:35:32,596 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:35:32,596 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:35:32,597 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (1/1) ... [2023-11-23 20:35:32,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:35:32,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:32,681 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:35:32,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:35:32,729 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-11-23 20:35:32,730 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-11-23 20:35:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:35:32,730 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:35:32,733 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:35:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:35:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-23 20:35:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-23 20:35:32,734 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:35:32,735 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:35:32,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:35:32,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:35:32,929 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:35:32,933 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:35:32,989 INFO L775 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-11-23 20:35:33,223 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:35:33,298 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:35:33,298 INFO L309 CfgBuilder]: Removed 6 assume(true) statements. [2023-11-23 20:35:33,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:33 BoogieIcfgContainer [2023-11-23 20:35:33,301 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:35:33,303 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:35:33,303 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:35:33,308 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:35:33,308 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:35:31" (1/3) ... [2023-11-23 20:35:33,309 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa15e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:33, skipping insertion in model container [2023-11-23 20:35:33,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:35:32" (2/3) ... [2023-11-23 20:35:33,310 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aa15e26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:35:33, skipping insertion in model container [2023-11-23 20:35:33,310 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:35:33" (3/3) ... [2023-11-23 20:35:33,312 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_update_all.i [2023-11-23 20:35:33,336 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:35:33,336 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:35:33,404 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:35:33,412 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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;@188a47b8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:35:33,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:35:33,418 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) [2023-11-23 20:35:33,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:35:33,428 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:33,429 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:33,429 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:33,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:33,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1570243634, now seen corresponding path program 1 times [2023-11-23 20:35:33,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:33,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490852973] [2023-11-23 20:35:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:33,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:33,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:33,694 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:33,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490852973] [2023-11-23 20:35:33,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490852973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:33,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:33,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:35:33,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437868857] [2023-11-23 20:35:33,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:33,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:33,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:33,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:33,752 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) [2023-11-23 20:35:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:33,862 INFO L93 Difference]: Finished difference Result 31 states and 45 transitions. [2023-11-23 20:35:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:33,865 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 [2023-11-23 20:35:33,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:33,872 INFO L225 Difference]: With dead ends: 31 [2023-11-23 20:35:33,873 INFO L226 Difference]: Without dead ends: 14 [2023-11-23 20:35:33,876 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:33,880 INFO L413 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 [2023-11-23 20:35:33,881 INFO L414 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] [2023-11-23 20:35:33,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-23 20:35:33,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 12. [2023-11-23 20:35:33,923 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) [2023-11-23 20:35:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2023-11-23 20:35:33,925 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 7 [2023-11-23 20:35:33,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:33,926 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2023-11-23 20:35:33,926 INFO L496 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) [2023-11-23 20:35:33,927 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2023-11-23 20:35:33,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:35:33,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:33,929 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:33,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:35:33,930 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:33,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:33,932 INFO L85 PathProgramCache]: Analyzing trace with hash 299858783, now seen corresponding path program 1 times [2023-11-23 20:35:33,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:33,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319843474] [2023-11-23 20:35:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:34,255 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319843474] [2023-11-23 20:35:34,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319843474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:34,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942459483] [2023-11-23 20:35:34,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:34,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:34,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:34,259 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:34,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:35:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:34,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:35:34,442 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:34,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:34,521 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:34,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942459483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:34,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1296643527] [2023-11-23 20:35:34,601 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2023-11-23 20:35:34,602 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:34,606 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:34,615 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:34,616 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:35,896 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:35:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1296643527] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:36,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:35:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 7 [2023-11-23 20:35:36,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552269141] [2023-11-23 20:35:36,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:36,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:36,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:36,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:36,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:35:36,138 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) [2023-11-23 20:35:36,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:36,232 INFO L93 Difference]: Finished difference Result 19 states and 26 transitions. [2023-11-23 20:35:36,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:35:36,233 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 [2023-11-23 20:35:36,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:36,234 INFO L225 Difference]: With dead ends: 19 [2023-11-23 20:35:36,234 INFO L226 Difference]: Without dead ends: 14 [2023-11-23 20:35:36,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-23 20:35:36,237 INFO L413 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 [2023-11-23 20:35:36,238 INFO L414 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] [2023-11-23 20:35:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-23 20:35:36,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2023-11-23 20:35:36,243 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) [2023-11-23 20:35:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 17 transitions. [2023-11-23 20:35:36,244 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 17 transitions. Word has length 10 [2023-11-23 20:35:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:36,244 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 17 transitions. [2023-11-23 20:35:36,245 INFO L496 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) [2023-11-23 20:35:36,245 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 17 transitions. [2023-11-23 20:35:36,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:35:36,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:36,246 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:36,272 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-23 20:35:36,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 20:35:36,461 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:36,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:36,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1448453533, now seen corresponding path program 1 times [2023-11-23 20:35:36,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:36,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302787405] [2023-11-23 20:35:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:36,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:36,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:35:36,604 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:36,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302787405] [2023-11-23 20:35:36,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302787405] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13571953] [2023-11-23 20:35:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:36,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:36,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:36,607 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:36,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:35:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:36,727 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:35:36,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:35:36,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:35:36,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13571953] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [789380875] [2023-11-23 20:35:36,782 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:35:36,782 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:36,783 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:36,783 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:36,784 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:37,757 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:35:38,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [789380875] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:38,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:35:38,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3, 3] total 8 [2023-11-23 20:35:38,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676860182] [2023-11-23 20:35:38,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:38,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:38,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:38,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:38,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:35:38,292 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) [2023-11-23 20:35:38,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:38,470 INFO L93 Difference]: Finished difference Result 20 states and 27 transitions. [2023-11-23 20:35:38,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:35:38,472 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 [2023-11-23 20:35:38,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:38,472 INFO L225 Difference]: With dead ends: 20 [2023-11-23 20:35:38,472 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 20:35:38,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:35:38,474 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 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 [2023-11-23 20:35:38,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:38,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 20:35:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2023-11-23 20:35:38,479 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) [2023-11-23 20:35:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 19 transitions. [2023-11-23 20:35:38,482 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 19 transitions. Word has length 12 [2023-11-23 20:35:38,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:38,482 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 19 transitions. [2023-11-23 20:35:38,482 INFO L496 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) [2023-11-23 20:35:38,482 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 19 transitions. [2023-11-23 20:35:38,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:35:38,483 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:38,483 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:38,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:38,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:38,684 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:38,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:38,684 INFO L85 PathProgramCache]: Analyzing trace with hash 474531345, now seen corresponding path program 1 times [2023-11-23 20:35:38,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:38,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248248442] [2023-11-23 20:35:38,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:38,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:38,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:35:38,850 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248248442] [2023-11-23 20:35:38,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248248442] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:38,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585032596] [2023-11-23 20:35:38,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:38,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:38,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:35:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:38,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:35:38,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:35:38,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:39,014 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:35:39,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585032596] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:39,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1466373815] [2023-11-23 20:35:39,021 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:35:39,022 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:39,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:39,023 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:39,023 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:40,235 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:35:43,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '403#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_dll_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_dll_get_data_at_#res#1| 2147483647) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_22| Int) (|v_ULTIMATE.start_main_~i~0#1_57| Int)) (and (<= 1 |#StackHeapBarrier|) (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$.base|) (= |#memory_$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|)))))) (= |v_ULTIMATE.start_main_~i~0#1_57| 2) (<= |v_ULTIMATE.start_main_~new_data~0#1_22| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_22|) (= |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|) |ULTIMATE.start_dll_get_data_at_#res#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_get_data_at_#res#1|)))' at error location [2023-11-23 20:35:43,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:35:43,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:35:43,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-11-23 20:35:43,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255856718] [2023-11-23 20:35:43,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:35:43,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:43,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:43,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=125, Unknown=1, NotChecked=0, Total=156 [2023-11-23 20:35:43,669 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) [2023-11-23 20:35:43,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:43,768 INFO L93 Difference]: Finished difference Result 26 states and 36 transitions. [2023-11-23 20:35:43,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:43,770 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 [2023-11-23 20:35:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:43,770 INFO L225 Difference]: With dead ends: 26 [2023-11-23 20:35:43,770 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 20:35:43,771 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=30, Invalid=125, Unknown=1, NotChecked=0, Total=156 [2023-11-23 20:35:43,772 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:43,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 15 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:35:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 20:35:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-23 20:35:43,786 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) [2023-11-23 20:35:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2023-11-23 20:35:43,788 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 13 [2023-11-23 20:35:43,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:43,792 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2023-11-23 20:35:43,793 INFO L496 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) [2023-11-23 20:35:43,793 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2023-11-23 20:35:43,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:35:43,795 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:43,795 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:43,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:44,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:44,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:44,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:44,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1856804994, now seen corresponding path program 2 times [2023-11-23 20:35:44,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:44,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203092407] [2023-11-23 20:35:44,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:44,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:35:44,223 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:44,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203092407] [2023-11-23 20:35:44,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203092407] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:44,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:44,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:44,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755627998] [2023-11-23 20:35:44,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:44,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:35:44,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:44,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:35:44,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:35:44,228 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) [2023-11-23 20:35:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:44,328 INFO L93 Difference]: Finished difference Result 31 states and 41 transitions. [2023-11-23 20:35:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:44,329 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 [2023-11-23 20:35:44,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:44,331 INFO L225 Difference]: With dead ends: 31 [2023-11-23 20:35:44,331 INFO L226 Difference]: Without dead ends: 24 [2023-11-23 20:35:44,332 INFO L412 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 [2023-11-23 20:35:44,336 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 6 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2023-11-23 20:35:44,337 INFO L414 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] [2023-11-23 20:35:44,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-23 20:35:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2023-11-23 20:35:44,348 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) [2023-11-23 20:35:44,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-23 20:35:44,349 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 16 [2023-11-23 20:35:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:44,350 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-23 20:35:44,350 INFO L496 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) [2023-11-23 20:35:44,351 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-23 20:35:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:35:44,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:44,352 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:44,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:35:44,352 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:44,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1814988096, now seen corresponding path program 3 times [2023-11-23 20:35:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:44,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943248704] [2023-11-23 20:35:44,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:44,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:46,144 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:46,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943248704] [2023-11-23 20:35:46,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943248704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:46,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329841664] [2023-11-23 20:35:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:35:46,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:46,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:46,147 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:46,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:35:46,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:35:46,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:35:47,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 78 conjunts are in the unsatisfiable core [2023-11-23 20:35:47,006 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:47,064 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 [2023-11-23 20:35:47,168 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 20:35:47,172 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 [2023-11-23 20:35:47,248 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 [2023-11-23 20:35:47,273 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2023-11-23 20:35:47,273 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 70 treesize of output 61 [2023-11-23 20:35:47,283 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 [2023-11-23 20:35:47,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:35:47,490 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 [2023-11-23 20:35:47,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 16 [2023-11-23 20:35:47,667 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 24 treesize of output 12 [2023-11-23 20:35:47,741 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 [2023-11-23 20:35:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:47,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:47,995 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_341 (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_341) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-23 20:35:48,003 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_341 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) (+ |c_ULTIMATE.start_dll_update_at_~head#1.offset| 4)) v_ArrVal_341) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-23 20:35:48,021 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_341 (Array Int Int))) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store |c_#memory_int| (select (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_341) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-23 20:35:48,035 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_341 (Array Int Int)) (v_ArrVal_338 Int)) (= |c_ULTIMATE.start_main_~len~0#1| (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_dll_update_at_~head#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_dll_update_at_~head#1.base|) |c_ULTIMATE.start_dll_update_at_~head#1.offset| |c_ULTIMATE.start_dll_update_at_~data#1|)) (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| (store (select |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base|) |c_ULTIMATE.start_dll_update_at_~head#1.offset| v_ArrVal_338)) |c_ULTIMATE.start_main_~s~0#1.base|) (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4)) v_ArrVal_341) |c_ULTIMATE.start_main_~s~0#1.base|) |c_ULTIMATE.start_main_~s~0#1.offset|))) is different from false [2023-11-23 20:35:48,189 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:35:48,190 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 87 treesize of output 107 [2023-11-23 20:35:48,221 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-23 20:35:48,221 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 57 treesize of output 75 [2023-11-23 20:35:48,256 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-23 20:35:48,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 92 [2023-11-23 20:35:48,278 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 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-23 20:35:48,319 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 [2023-11-23 20:35:48,332 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:35:48,332 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 [2023-11-23 20:35:48,340 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 34 [2023-11-23 20:35:48,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-23 20:35:48,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:35:48,362 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 20 treesize of output 14 [2023-11-23 20:35:48,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-23 20:35:48,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:35:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2023-11-23 20:35:48,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329841664] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:48,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801238926] [2023-11-23 20:35:48,469 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:35:48,469 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:48,469 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:48,469 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:48,470 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:49,728 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:35:51,912 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '703#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (exists ((|v_ULTIMATE.start_main_~new_data~0#1_30| Int) (|v_ULTIMATE.start_main_~i~0#1_69| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~new_data~0#1_30| 3) (exists ((|v_#memory_$Pointer$.offset_84| (Array Int (Array Int Int))) (|v_#memory_$Pointer$.base_85| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.base_46| Int) (|v_#memory_int_105| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_44| Int)) (and (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44|) 3) (= |#memory_int| (store |v_#memory_int_105| |v_ULTIMATE.start_dll_update_at_~head#1.base_46| (store (select |v_#memory_int_105| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44|)))) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_84| |v_ULTIMATE.start_dll_update_at_~head#1.base_46| (store (select |v_#memory_$Pointer$.offset_84| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44|)))) (= |#memory_$Pointer$.base| (store |v_#memory_$Pointer$.base_85| |v_ULTIMATE.start_dll_update_at_~head#1.base_46| (store (select |v_#memory_$Pointer$.base_85| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_46|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_44|)))))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_30|) (= |v_ULTIMATE.start_main_~i~0#1_69| 2) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_dll_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_dll_get_data_at_#res#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_dll_get_data_at_#res#1|) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_get_data_at_#res#1|)))' at error location [2023-11-23 20:35:51,912 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:35:51,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:35:51,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 39 [2023-11-23 20:35:51,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189835448] [2023-11-23 20:35:51,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:35:51,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-23 20:35:51,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:51,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-23 20:35:51,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1658, Unknown=4, NotChecked=340, Total=2162 [2023-11-23 20:35:51,917 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:53,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:53,278 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2023-11-23 20:35:53,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 20:35:53,280 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-23 20:35:53,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:53,282 INFO L225 Difference]: With dead ends: 43 [2023-11-23 20:35:53,282 INFO L226 Difference]: Without dead ends: 41 [2023-11-23 20:35:53,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=285, Invalid=2589, Unknown=4, NotChecked=428, Total=3306 [2023-11-23 20:35:53,286 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:53,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 493 Invalid, 0 Unknown, 208 Unchecked, 0.7s Time] [2023-11-23 20:35:53,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-23 20:35:53,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 27. [2023-11-23 20:35:53,301 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) [2023-11-23 20:35:53,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2023-11-23 20:35:53,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2023-11-23 20:35:53,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:53,303 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2023-11-23 20:35:53,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:53,304 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2023-11-23 20:35:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:35:53,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:53,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:53,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:53,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:35:53,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:53,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1047799090, now seen corresponding path program 4 times [2023-11-23 20:35:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285904867] [2023-11-23 20:35:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:53,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:53,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:53,671 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:35:53,671 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:53,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285904867] [2023-11-23 20:35:53,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285904867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:53,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384187864] [2023-11-23 20:35:53,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-23 20:35:53,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:53,673 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:53,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:35:53,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:53,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:35:53,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:53,859 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:35:53,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:53,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:35:53,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384187864] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:53,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [837667526] [2023-11-23 20:35:53,895 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:35:53,896 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:53,896 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:53,896 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:53,897 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:54,857 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:35:56,126 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '963#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_dll_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_dll_get_data_at_#res#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_dll_get_data_at_#res#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_80| Int) (|v_ULTIMATE.start_main_~new_data~0#1_38| Int)) (and (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_38|) (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_~data~0#1| 1) (exists ((|v_#memory_$Pointer$.base_99| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.base_59| Int) (|v_#memory_$Pointer$.offset_98| (Array Int (Array Int Int))) (|v_#memory_int_123| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_57| Int)) (and (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57|) 3) (= |#memory_int| (store |v_#memory_int_123| |v_ULTIMATE.start_dll_update_at_~head#1.base_59| (store (select |v_#memory_int_123| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57|)) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_98| |v_ULTIMATE.start_dll_update_at_~head#1.base_59| (store (select |v_#memory_$Pointer$.offset_98| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57|)))) (= (store |v_#memory_$Pointer$.base_99| |v_ULTIMATE.start_dll_update_at_~head#1.base_59| (store (select |v_#memory_$Pointer$.base_99| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_59|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_57|))) |#memory_$Pointer$.base|))) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (= |v_ULTIMATE.start_main_~i~0#1_80| 2) (<= |v_ULTIMATE.start_main_~new_data~0#1_38| 3) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_get_data_at_#res#1|)))' at error location [2023-11-23 20:35:56,126 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:35:56,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:35:56,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2023-11-23 20:35:56,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488366653] [2023-11-23 20:35:56,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:35:56,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 20:35:56,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:56,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 20:35:56,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-23 20:35:56,128 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2023-11-23 20:35:56,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:56,281 INFO L93 Difference]: Finished difference Result 45 states and 61 transitions. [2023-11-23 20:35:56,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 20:35:56,281 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-23 20:35:56,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:56,282 INFO L225 Difference]: With dead ends: 45 [2023-11-23 20:35:56,282 INFO L226 Difference]: Without dead ends: 38 [2023-11-23 20:35:56,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:35:56,284 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:56,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:35:56,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-23 20:35:56,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2023-11-23 20:35:56,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:56,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2023-11-23 20:35:56,297 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 19 [2023-11-23 20:35:56,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:56,297 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2023-11-23 20:35:56,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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) [2023-11-23 20:35:56,298 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2023-11-23 20:35:56,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-23 20:35:56,298 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:56,299 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:56,324 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:56,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 20:35:56,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:56,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:56,513 INFO L85 PathProgramCache]: Analyzing trace with hash 428634211, now seen corresponding path program 1 times [2023-11-23 20:35:56,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:56,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642892490] [2023-11-23 20:35:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:56,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:56,611 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:56,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642892490] [2023-11-23 20:35:56,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642892490] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:56,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:56,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:56,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638564094] [2023-11-23 20:35:56,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:35:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:35:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:35:56,614 INFO L87 Difference]: Start difference. First operand 28 states and 38 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) [2023-11-23 20:35:56,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:56,685 INFO L93 Difference]: Finished difference Result 38 states and 50 transitions. [2023-11-23 20:35:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:35:56,686 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 [2023-11-23 20:35:56,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:56,687 INFO L225 Difference]: With dead ends: 38 [2023-11-23 20:35:56,687 INFO L226 Difference]: Without dead ends: 33 [2023-11-23 20:35:56,687 INFO L412 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 [2023-11-23 20:35:56,689 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 5 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2023-11-23 20:35:56,689 INFO L414 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] [2023-11-23 20:35:56,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-23 20:35:56,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-11-23 20:35:56,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2023-11-23 20:35:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-23 20:35:56,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 19 [2023-11-23 20:35:56,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:56,720 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-23 20:35:56,721 INFO L496 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) [2023-11-23 20:35:56,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-23 20:35:56,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:35:56,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:56,722 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:56,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:35:56,723 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:56,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 1493809982, now seen corresponding path program 5 times [2023-11-23 20:35:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:56,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729729334] [2023-11-23 20:35:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:56,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 20:35:56,877 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729729334] [2023-11-23 20:35:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729729334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:56,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463396324] [2023-11-23 20:35:56,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:35:56,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:56,878 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:56,879 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:56,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:35:57,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 20:35:57,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:35:57,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 20:35:57,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:57,120 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:35:57,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:35:57,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463396324] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:57,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-23 20:35:57,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2023-11-23 20:35:57,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515938214] [2023-11-23 20:35:57,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:57,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:57,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:57,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:57,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-23 20:35:57,124 INFO L87 Difference]: Start difference. First operand 30 states and 39 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) [2023-11-23 20:35:57,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:57,214 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2023-11-23 20:35:57,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:35:57,215 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 [2023-11-23 20:35:57,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:57,217 INFO L225 Difference]: With dead ends: 44 [2023-11-23 20:35:57,217 INFO L226 Difference]: Without dead ends: 37 [2023-11-23 20:35:57,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-23 20:35:57,221 INFO L413 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 [2023-11-23 20:35:57,221 INFO L414 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] [2023-11-23 20:35:57,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-23 20:35:57,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-23 20:35:57,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 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) [2023-11-23 20:35:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-11-23 20:35:57,242 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 20 [2023-11-23 20:35:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:57,242 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-11-23 20:35:57,243 INFO L496 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) [2023-11-23 20:35:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-11-23 20:35:57,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:35:57,244 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:57,244 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:57,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:35:57,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:57,468 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:57,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:57,468 INFO L85 PathProgramCache]: Analyzing trace with hash -54969726, now seen corresponding path program 6 times [2023-11-23 20:35:57,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:57,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468648421] [2023-11-23 20:35:57,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:57,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:57,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:35:57,576 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:57,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468648421] [2023-11-23 20:35:57,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468648421] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:35:57,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888516312] [2023-11-23 20:35:57,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 20:35:57,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:35:57,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:35:57,579 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:35:57,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:35:57,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 20:35:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:35:57,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:35:57,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:35:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:35:57,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:35:57,804 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-23 20:35:57,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888516312] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:35:57,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473385338] [2023-11-23 20:35:57,810 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:35:57,810 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:35:57,810 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:35:57,811 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:35:57,811 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:35:58,778 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:06,091 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1526#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_dll_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_dll_get_data_at_#res#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_dll_get_data_at_#res#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_94| Int) (|v_ULTIMATE.start_main_~new_data~0#1_47| Int)) (and (<= 1 |#StackHeapBarrier|) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_47|) (<= |v_ULTIMATE.start_main_~new_data~0#1_47| 3) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (= |v_ULTIMATE.start_main_~i~0#1_94| 2) (exists ((|v_#memory_$Pointer$.offset_119| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_70| Int) (|v_#memory_int_154| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.base_72| Int) (|v_#memory_$Pointer$.base_120| (Array Int (Array Int Int)))) (and (= (store |v_#memory_$Pointer$.base_120| |v_ULTIMATE.start_dll_update_at_~head#1.base_72| (store (select |v_#memory_$Pointer$.base_120| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70|))) |#memory_$Pointer$.base|) (= |#memory_int| (store |v_#memory_int_154| |v_ULTIMATE.start_dll_update_at_~head#1.base_72| (store (select |v_#memory_int_154| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70|)))) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70|) 3) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_119| |v_ULTIMATE.start_dll_update_at_~head#1.base_72| (store (select |v_#memory_$Pointer$.offset_119| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70|)))) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_72|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_70|)))) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_get_data_at_#res#1|)))' at error location [2023-11-23 20:36:06,091 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:06,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:06,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-23 20:36:06,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21172822] [2023-11-23 20:36:06,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:06,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:36:06,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:06,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:36:06,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=140, Unknown=3, NotChecked=0, Total=182 [2023-11-23 20:36:06,094 INFO L87 Difference]: Start difference. First operand 30 states and 39 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) [2023-11-23 20:36:06,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:06,194 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2023-11-23 20:36:06,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:06,195 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 20 [2023-11-23 20:36:06,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:06,196 INFO L225 Difference]: With dead ends: 43 [2023-11-23 20:36:06,196 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 20:36:06,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=44, Invalid=163, Unknown=3, NotChecked=0, Total=210 [2023-11-23 20:36:06,197 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:06,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 21 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:06,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 20:36:06,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2023-11-23 20:36:06,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:06,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-23 20:36:06,209 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 20 [2023-11-23 20:36:06,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:06,209 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-23 20:36:06,209 INFO L496 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) [2023-11-23 20:36:06,210 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-23 20:36:06,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:36:06,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:06,211 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:06,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:06,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 20:36:06,429 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:06,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:06,429 INFO L85 PathProgramCache]: Analyzing trace with hash 995539652, now seen corresponding path program 1 times [2023-11-23 20:36:06,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:06,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705528381] [2023-11-23 20:36:06,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:06,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:06,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705528381] [2023-11-23 20:36:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705528381] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:06,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056619004] [2023-11-23 20:36:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:06,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:06,534 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:06,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:06,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 20:36:06,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:06,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 20:36:06,713 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:06,727 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:06,727 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-11-23 20:36:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056619004] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:06,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1320599115] [2023-11-23 20:36:06,749 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:06,749 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:06,750 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:06,750 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:06,750 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:36:07,665 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:36:13,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1782#(and (= |ULTIMATE.start_main_~len~0#1| |ULTIMATE.start_main_~expected~0#1|) (= |ULTIMATE.start_main_~i~0#1| 0) (<= 0 (+ |ULTIMATE.start_dll_get_data_at_#res#1| 2147483648)) (<= |ULTIMATE.start_dll_get_data_at_#res#1| 2147483647) (= (select (select |#memory_int| |ULTIMATE.start_main_~s~0#1.base|) |ULTIMATE.start_main_~s~0#1.offset|) |ULTIMATE.start_dll_get_data_at_#res#1|) (exists ((|v_ULTIMATE.start_main_~i~0#1_103| Int) (|v_ULTIMATE.start_main_~new_data~0#1_53| Int)) (and (<= 1 |#StackHeapBarrier|) (<= |v_ULTIMATE.start_main_~new_data~0#1_53| 3) (exists ((|v_#memory_int_170| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.base_81| Int) (|v_#memory_$Pointer$.offset_131| (Array Int (Array Int Int))) (|v_ULTIMATE.start_dll_update_at_~head#1.offset_79| Int) (|v_#memory_$Pointer$.base_132| (Array Int (Array Int Int)))) (and (= |#memory_int| (store |v_#memory_int_170| |v_ULTIMATE.start_dll_update_at_~head#1.base_81| (store (select |v_#memory_int_170| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79| (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79|)))) (= (store |v_#memory_$Pointer$.base_132| |v_ULTIMATE.start_dll_update_at_~head#1.base_81| (store (select |v_#memory_$Pointer$.base_132| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79| (select (select |#memory_$Pointer$.base| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79|))) |#memory_$Pointer$.base|) (<= 2 (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79|)) (<= (select (select |#memory_int| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79|) 3) (= |#memory_$Pointer$.offset| (store |v_#memory_$Pointer$.offset_131| |v_ULTIMATE.start_dll_update_at_~head#1.base_81| (store (select |v_#memory_$Pointer$.offset_131| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79| (select (select |#memory_$Pointer$.offset| |v_ULTIMATE.start_dll_update_at_~head#1.base_81|) |v_ULTIMATE.start_dll_update_at_~head#1.offset_79|)))))) (= |ULTIMATE.start_main_~data~0#1| 1) (= |ULTIMATE.start_main_~len~0#1| 2) (= |ULTIMATE.start_dll_create_#res#1.offset| 0) (= 2 |v_ULTIMATE.start_main_~i~0#1_103|) (<= 2 |v_ULTIMATE.start_main_~new_data~0#1_53|) (= |ULTIMATE.start_main_~s~0#1.offset| 0))) (not (= |ULTIMATE.start_main_~expected~0#1| |ULTIMATE.start_dll_get_data_at_#res#1|)))' at error location [2023-11-23 20:36:13,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:36:13,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 20:36:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2023-11-23 20:36:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242781941] [2023-11-23 20:36:13,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 20:36:13,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:36:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:36:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:36:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=144, Unknown=2, NotChecked=0, Total=182 [2023-11-23 20:36:13,596 INFO L87 Difference]: Start difference. First operand 29 states and 35 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) [2023-11-23 20:36:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:36:13,720 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-11-23 20:36:13,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:36:13,720 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 [2023-11-23 20:36:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:36:13,721 INFO L225 Difference]: With dead ends: 38 [2023-11-23 20:36:13,721 INFO L226 Difference]: Without dead ends: 33 [2023-11-23 20:36:13,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=41, Invalid=167, Unknown=2, NotChecked=0, Total=210 [2023-11-23 20:36:13,722 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 17 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 20:36:13,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 20:36:13,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-23 20:36:13,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-11-23 20:36:13,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:36:13,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-23 20:36:13,738 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 21 [2023-11-23 20:36:13,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:36:13,738 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-23 20:36:13,739 INFO L496 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) [2023-11-23 20:36:13,739 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-23 20:36:13,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-23 20:36:13,740 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:36:13,740 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:36:13,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 20:36:13,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 20:36:13,948 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:36:13,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:36:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash 795536223, now seen corresponding path program 1 times [2023-11-23 20:36:13,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:36:13,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13327310] [2023-11-23 20:36:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:13,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:36:14,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:15,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:36:15,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13327310] [2023-11-23 20:36:15,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13327310] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 20:36:15,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404002260] [2023-11-23 20:36:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:36:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:36:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:36:15,545 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:36:15,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_697fe892-fec8-4509-84d2-c944f014a37b/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 20:36:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:36:15,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-23 20:36:15,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:36:15,751 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 [2023-11-23 20:36:15,831 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-23 20:36:15,831 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 [2023-11-23 20:36:15,881 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 [2023-11-23 20:36:15,894 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-23 20:36:15,895 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 86 treesize of output 77 [2023-11-23 20:36:15,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:16,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:16,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 18 [2023-11-23 20:36:16,263 INFO L349 Elim1Store]: treesize reduction 21, result has 19.2 percent of original size [2023-11-23 20:36:16,264 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 90 treesize of output 81 [2023-11-23 20:36:16,269 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 [2023-11-23 20:36:16,274 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 [2023-11-23 20:36:16,552 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 49 treesize of output 25 [2023-11-23 20:36:16,556 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 [2023-11-23 20:36:16,635 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:36:16,636 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:36:16,854 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 [2023-11-23 20:36:16,872 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (+ |c_ULTIMATE.start_main_~s~0#1.offset| 4))) (and (forall ((v_ArrVal_1015 (Array Int Int))) (= |c_ULTIMATE.start_dll_update_at_~head#1.offset| (select (select (store |c_#memory_$Pointer$.offset| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1015) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0))) (forall ((v_ArrVal_1014 (Array Int Int))) (= (select (select (store |c_#memory_$Pointer$.base| |c_ULTIMATE.start_dll_update_at_~head#1.base| v_ArrVal_1014) |c_ULTIMATE.start_main_~s~0#1.base|) .cse0) |c_ULTIMATE.start_dll_update_at_~head#1.base|)) (= |c_ULTIMATE.start_dll_update_at_~data#1| (+ |c_ULTIMATE.start_main_~len~0#1| 1)))) is different from false [2023-11-23 20:36:16,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:36:16,895 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 [2023-11-23 20:36:16,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-23 20:36:17,321 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 20:36:17,321 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 87 treesize of output 107 [2023-11-23 20:36:17,347 INFO L349 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-11-23 20:36:17,347 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 57 treesize of output 75 [2023-11-23 20:36:17,376 INFO L349 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2023-11-23 20:36:17,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 84 treesize of output 92 [2023-11-23 20:36:17,405 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 0 case distinctions, treesize of input 23 treesize of output 15 [2023-11-23 20:36:17,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:17,463 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 40 treesize of output 36 [2023-11-23 20:36:17,466 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:17,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-11-23 20:36:17,472 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-23 20:36:17,474 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-11-23 20:36:17,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:36:17,589 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-11-23 20:36:17,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404002260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:36:17,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1572752020] [2023-11-23 20:36:17,591 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-11-23 20:36:17,592 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:36:17,592 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:36:17,592 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:36:17,593 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs