./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E --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 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:13:50,130 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:13:50,205 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:13:50,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:13:50,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:13:50,239 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:13:50,240 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:13:50,240 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:13:50,240 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:13:50,241 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:13:50,241 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:13:50,241 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:13:50,241 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:13:50,241 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:13:50,241 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:13:50,242 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:13:50,242 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:13:50,242 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:13:50,242 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:13:50,242 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:13:50,243 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:13:50,243 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:13:50,243 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:13:50,243 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:13:50,244 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:13:50,244 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:13:50,244 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:13:50,244 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:13:50,244 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:13:50,244 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:13:50,245 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:13:50,245 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:13:50,245 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:13:50,245 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:13:50,245 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:13:50,245 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:13:50,246 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:13:50,246 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:13:50,246 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:13:50,246 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:13:50,246 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:13:50,247 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:13:50,247 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:13:50,247 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:13:50,247 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:13:50,247 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:13:50,247 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:13:50,248 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E 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 -> 2e1c46549da470f14361a9b2a5fb79d079bbffb4006138f4fef05b9b152f9be7 [2024-11-14 04:13:50,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:13:50,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:13:50,689 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:13:50,691 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:13:50,691 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:13:50,694 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i Unable to find full path for "g++" [2024-11-14 04:13:53,023 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:13:53,345 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:13:53,346 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i [2024-11-14 04:13:53,355 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/data/147ca2c19/b2f9a576ba1346c3a8c6d4244b4c63b0/FLAG6e3b0d166 [2024-11-14 04:13:53,372 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/data/147ca2c19/b2f9a576ba1346c3a8c6d4244b4c63b0 [2024-11-14 04:13:53,374 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:13:53,376 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:13:53,378 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:13:53,378 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:13:53,384 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:13:53,385 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,386 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11fde26d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53, skipping insertion in model container [2024-11-14 04:13:53,387 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,405 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:13:53,616 WARN L250 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_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2024-11-14 04:13:53,638 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:13:53,647 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:13:53,658 WARN L250 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_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/sv-benchmarks/c/array-lopstr16/flag_loopdep_simple.i[812,825] [2024-11-14 04:13:53,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:13:53,683 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:13:53,684 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53 WrapperNode [2024-11-14 04:13:53,684 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:13:53,685 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:13:53,685 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:13:53,686 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:13:53,694 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,702 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,722 INFO L138 Inliner]: procedures = 17, calls = 14, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 60 [2024-11-14 04:13:53,722 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:13:53,723 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:13:53,723 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:13:53,723 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:13:53,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,733 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,733 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,739 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,743 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,744 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,745 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,747 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:13:53,748 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:13:53,748 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:13:53,748 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:13:53,749 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (1/1) ... [2024-11-14 04:13:53,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:13:53,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:53,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:13:53,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:13:53,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:13:53,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:13:53,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:13:53,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:13:53,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:13:53,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:13:53,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:13:53,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:13:53,937 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:13:53,940 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:13:54,120 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-11-14 04:13:54,121 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:13:54,177 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:13:54,177 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 04:13:54,177 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:13:54 BoogieIcfgContainer [2024-11-14 04:13:54,178 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:13:54,181 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:13:54,181 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:13:54,188 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:13:54,188 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:13:53" (1/3) ... [2024-11-14 04:13:54,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5490176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:13:54, skipping insertion in model container [2024-11-14 04:13:54,189 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:13:53" (2/3) ... [2024-11-14 04:13:54,189 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5490176 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:13:54, skipping insertion in model container [2024-11-14 04:13:54,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:13:54" (3/3) ... [2024-11-14 04:13:54,192 INFO L112 eAbstractionObserver]: Analyzing ICFG flag_loopdep_simple.i [2024-11-14 04:13:54,214 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:13:54,218 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG flag_loopdep_simple.i that has 1 procedures, 11 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 04:13:54,301 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:13:54,323 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7fbbfb48, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:13:54,323 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:13:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:54,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:13:54,337 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:54,338 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:54,338 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:54,346 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:54,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1058495159, now seen corresponding path program 1 times [2024-11-14 04:13:54,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:54,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650440717] [2024-11-14 04:13:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:54,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:54,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:13:54,716 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:54,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650440717] [2024-11-14 04:13:54,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650440717] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:13:54,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:13:54,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 04:13:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252596531] [2024-11-14 04:13:54,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:13:54,730 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:13:54,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:54,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:13:54,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:13:54,761 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 10 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) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:54,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:54,820 INFO L93 Difference]: Finished difference Result 21 states and 29 transitions. [2024-11-14 04:13:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:13:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:13:54,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:54,833 INFO L225 Difference]: With dead ends: 21 [2024-11-14 04:13:54,833 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 04:13:54,839 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:13:54,844 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:54,845 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:13:54,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 04:13:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 04:13:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:54,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-11-14 04:13:54,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2024-11-14 04:13:54,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:54,892 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-11-14 04:13:54,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:54,892 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-11-14 04:13:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:13:54,893 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:54,893 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:54,893 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:13:54,895 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:54,896 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:54,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1442280527, now seen corresponding path program 1 times [2024-11-14 04:13:54,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:54,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117858903] [2024-11-14 04:13:54,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:54,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:54,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:13:55,039 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:55,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117858903] [2024-11-14 04:13:55,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117858903] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:13:55,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:13:55,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 04:13:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128507937] [2024-11-14 04:13:55,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:13:55,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 04:13:55,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:55,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 04:13:55,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:13:55,043 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:55,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:55,077 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2024-11-14 04:13:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 04:13:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 8 [2024-11-14 04:13:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:55,079 INFO L225 Difference]: With dead ends: 26 [2024-11-14 04:13:55,079 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 04:13:55,079 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 04:13:55,080 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 7 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:55,081 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 12 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:13:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 04:13:55,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 12. [2024-11-14 04:13:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2024-11-14 04:13:55,086 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2024-11-14 04:13:55,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:55,086 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-11-14 04:13:55,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:55,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2024-11-14 04:13:55,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-14 04:13:55,087 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:55,087 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:55,087 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 04:13:55,087 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:55,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:55,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1677814218, now seen corresponding path program 1 times [2024-11-14 04:13:55,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:55,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723977782] [2024-11-14 04:13:55,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:55,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:13:55,214 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723977782] [2024-11-14 04:13:55,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723977782] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:13:55,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42976588] [2024-11-14 04:13:55,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:55,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:55,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:55,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:13:55,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:13:55,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:55,342 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:13:55,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:13:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:13:55,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:13:55,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 04:13:55,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42976588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:13:55,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [825585478] [2024-11-14 04:13:55,491 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:13:55,491 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:13:55,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:13:55,502 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:13:55,503 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:13:56,540 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:13:56,733 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '170#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:13:56,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:13:56,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:13:56,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-11-14 04:13:56,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744218843] [2024-11-14 04:13:56,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:13:56,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 04:13:56,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:56,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 04:13:56,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:13:56,736 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:56,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:56,826 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-11-14 04:13:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-14 04:13:56,830 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 9 [2024-11-14 04:13:56,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:56,831 INFO L225 Difference]: With dead ends: 39 [2024-11-14 04:13:56,831 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 04:13:56,831 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-11-14 04:13:56,832 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 14 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:56,833 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:13:56,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 04:13:56,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 16. [2024-11-14 04:13:56,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:56,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-11-14 04:13:56,841 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 9 [2024-11-14 04:13:56,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:56,842 INFO L471 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-11-14 04:13:56,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:56,842 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-11-14 04:13:56,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 04:13:56,844 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:56,844 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:56,870 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-14 04:13:57,049 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:57,051 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:57,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1979764823, now seen corresponding path program 2 times [2024-11-14 04:13:57,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:57,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425320183] [2024-11-14 04:13:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 04:13:57,330 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:57,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425320183] [2024-11-14 04:13:57,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425320183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:13:57,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252954025] [2024-11-14 04:13:57,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:13:57,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:57,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:57,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:13:57,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:13:57,436 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 04:13:57,437 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:13:57,439 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 04:13:57,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:13:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:13:57,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:13:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 04:13:57,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252954025] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:13:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1620261220] [2024-11-14 04:13:57,567 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:13:57,567 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:13:57,568 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:13:57,568 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:13:57,568 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:13:58,043 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:13:58,245 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '337#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:13:58,245 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:13:58,246 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:13:58,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-14 04:13:58,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483370990] [2024-11-14 04:13:58,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:13:58,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 04:13:58,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:58,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 04:13:58,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:13:58,251 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:58,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:58,386 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2024-11-14 04:13:58,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 04:13:58,387 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 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) Word has length 13 [2024-11-14 04:13:58,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:58,388 INFO L225 Difference]: With dead ends: 67 [2024-11-14 04:13:58,388 INFO L226 Difference]: Without dead ends: 57 [2024-11-14 04:13:58,389 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-14 04:13:58,390 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 70 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:58,390 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 45 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:13:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-11-14 04:13:58,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 21. [2024-11-14 04:13:58,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:58,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2024-11-14 04:13:58,396 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2024-11-14 04:13:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:58,397 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2024-11-14 04:13:58,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2024-11-14 04:13:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 04:13:58,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:58,398 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:58,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:13:58,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:58,598 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:13:58,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:13:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash 832649455, now seen corresponding path program 3 times [2024-11-14 04:13:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:13:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332106308] [2024-11-14 04:13:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:13:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:13:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:13:58,940 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:13:58,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:13:58,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332106308] [2024-11-14 04:13:58,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332106308] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:13:58,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144216798] [2024-11-14 04:13:58,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:13:58,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:13:58,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:13:58,947 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:13:58,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:13:59,064 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:13:59,064 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:13:59,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:13:59,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:13:59,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:13:59,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:13:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:13:59,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144216798] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:13:59,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1514355891] [2024-11-14 04:13:59,387 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:13:59,387 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:13:59,389 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:13:59,389 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:13:59,389 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:13:59,754 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:13:59,911 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '590#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:13:59,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:13:59,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:13:59,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-14 04:13:59,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704596212] [2024-11-14 04:13:59,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:13:59,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 04:13:59,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:13:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 04:13:59,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:13:59,913 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:59,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:13:59,951 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2024-11-14 04:13:59,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 04:13:59,952 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-11-14 04:13:59,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:13:59,953 INFO L225 Difference]: With dead ends: 42 [2024-11-14 04:13:59,953 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 04:13:59,953 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2024-11-14 04:13:59,954 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:13:59,955 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 04:13:59,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 04:13:59,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-11-14 04:13:59,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:59,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2024-11-14 04:13:59,964 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 18 [2024-11-14 04:13:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:13:59,965 INFO L471 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2024-11-14 04:13:59,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.35) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:13:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2024-11-14 04:13:59,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 04:13:59,966 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:13:59,966 INFO L215 NwaCegarLoop]: trace histogram [12, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:13:59,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:14:00,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:00,171 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:14:00,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:00,172 INFO L85 PathProgramCache]: Analyzing trace with hash -869950359, now seen corresponding path program 4 times [2024-11-14 04:14:00,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:00,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271704197] [2024-11-14 04:14:00,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:00,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:00,727 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:14:00,727 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:00,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271704197] [2024-11-14 04:14:00,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271704197] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:00,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532726952] [2024-11-14 04:14:00,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:14:00,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:00,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:00,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:00,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:14:00,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:00,852 INFO L255 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 04:14:00,854 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:14:01,212 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:14:01,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532726952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:01,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [741595055] [2024-11-14 04:14:01,733 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:01,733 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:01,733 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:01,733 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:01,733 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:01,930 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:02,061 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '900#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:14:02,061 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:02,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:02,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 40 [2024-11-14 04:14:02,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933728170] [2024-11-14 04:14:02,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:02,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 04:14:02,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:02,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 04:14:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=1216, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:14:02,065 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:02,151 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2024-11-14 04:14:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 04:14:02,152 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 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 25 [2024-11-14 04:14:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:02,152 INFO L225 Difference]: With dead ends: 56 [2024-11-14 04:14:02,152 INFO L226 Difference]: Without dead ends: 42 [2024-11-14 04:14:02,154 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=764, Invalid=1216, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 04:14:02,155 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:02,155 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:02,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-11-14 04:14:02,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-11-14 04:14:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:02,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2024-11-14 04:14:02,163 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 25 [2024-11-14 04:14:02,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:02,164 INFO L471 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2024-11-14 04:14:02,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:02,164 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2024-11-14 04:14:02,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 04:14:02,165 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:02,165 INFO L215 NwaCegarLoop]: trace histogram [26, 6, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:02,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:14:02,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:02,366 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:14:02,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:02,367 INFO L85 PathProgramCache]: Analyzing trace with hash 989266345, now seen corresponding path program 5 times [2024-11-14 04:14:02,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:02,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309227184] [2024-11-14 04:14:02,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:02,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:03,837 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 04:14:03,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309227184] [2024-11-14 04:14:03,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309227184] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:03,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325954802] [2024-11-14 04:14:03,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:14:03,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:03,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:03,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:03,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:14:03,972 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:14:03,972 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:03,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 04:14:03,976 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 04:14:04,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 04:14:04,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325954802] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:04,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1139090663] [2024-11-14 04:14:04,460 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:04,460 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:04,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:04,461 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:04,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:04,645 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:04,814 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1351#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:14:04,815 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:04,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:04,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 9, 9] total 43 [2024-11-14 04:14:04,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129061244] [2024-11-14 04:14:04,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:04,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 04:14:04,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 04:14:04,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=1585, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:14:04,820 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:05,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:05,067 INFO L93 Difference]: Finished difference Result 157 states and 184 transitions. [2024-11-14 04:14:05,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-11-14 04:14:05,068 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 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 39 [2024-11-14 04:14:05,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:05,069 INFO L225 Difference]: With dead ends: 157 [2024-11-14 04:14:05,069 INFO L226 Difference]: Without dead ends: 143 [2024-11-14 04:14:05,070 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=577, Invalid=1585, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 04:14:05,075 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 224 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:05,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 80 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:14:05,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-11-14 04:14:05,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 51. [2024-11-14 04:14:05,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2024-11-14 04:14:05,095 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 39 [2024-11-14 04:14:05,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:05,097 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2024-11-14 04:14:05,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 43 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:05,098 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2024-11-14 04:14:05,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 04:14:05,098 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:05,099 INFO L215 NwaCegarLoop]: trace histogram [27, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:05,123 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:14:05,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:05,300 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:14:05,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1250261457, now seen corresponding path program 6 times [2024-11-14 04:14:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718728838] [2024-11-14 04:14:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:05,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:06,692 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:06,693 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:06,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718728838] [2024-11-14 04:14:06,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718728838] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:06,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289933740] [2024-11-14 04:14:06,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:14:06,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:06,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:06,695 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:06,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:14:06,850 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:14:06,850 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:06,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 04:14:06,861 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:07,697 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:09,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289933740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:09,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [352440847] [2024-11-14 04:14:09,294 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:09,294 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:09,294 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:09,295 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:09,295 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:09,569 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:09,766 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2041#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:14:09,766 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:09,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:09,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 85 [2024-11-14 04:14:09,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315469393] [2024-11-14 04:14:09,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:09,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-14 04:14:09,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:09,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-14 04:14:09,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3319, Invalid=4871, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 04:14:09,775 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 86 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:09,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:09,939 INFO L93 Difference]: Finished difference Result 102 states and 136 transitions. [2024-11-14 04:14:09,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 04:14:09,941 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 85 states have internal predecessors, (93), 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 48 [2024-11-14 04:14:09,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:09,942 INFO L225 Difference]: With dead ends: 102 [2024-11-14 04:14:09,942 INFO L226 Difference]: Without dead ends: 80 [2024-11-14 04:14:09,947 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3742 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3319, Invalid=4871, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 04:14:09,948 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:09,949 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 64 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:14:09,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-11-14 04:14:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2024-11-14 04:14:09,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2024-11-14 04:14:09,966 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 48 [2024-11-14 04:14:09,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:09,966 INFO L471 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2024-11-14 04:14:09,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0813953488372092) internal successors, (93), 85 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:09,966 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2024-11-14 04:14:09,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-11-14 04:14:09,972 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:09,972 INFO L215 NwaCegarLoop]: trace histogram [56, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:09,997 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:14:10,172 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:10,173 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:14:10,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:10,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2090922089, now seen corresponding path program 7 times [2024-11-14 04:14:10,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624292516] [2024-11-14 04:14:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:10,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:10,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:14,037 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624292516] [2024-11-14 04:14:14,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624292516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:14,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665134227] [2024-11-14 04:14:14,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:14:14,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:14,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:14,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:14:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:14,282 INFO L255 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-11-14 04:14:14,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:16,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:16,431 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:21,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665134227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:21,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1512863301] [2024-11-14 04:14:21,752 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:21,752 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:21,752 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:21,752 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:21,752 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:21,991 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:22,271 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3019#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:14:22,271 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:22,271 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:22,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2024-11-14 04:14:22,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493180744] [2024-11-14 04:14:22,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:22,272 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2024-11-14 04:14:22,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2024-11-14 04:14:22,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13353, Invalid=18153, Unknown=0, NotChecked=0, Total=31506 [2024-11-14 04:14:22,285 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 173 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 172 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:22,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:22,614 INFO L93 Difference]: Finished difference Result 160 states and 223 transitions. [2024-11-14 04:14:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-14 04:14:22,615 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 172 states have internal predecessors, (180), 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 77 [2024-11-14 04:14:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:22,617 INFO L225 Difference]: With dead ends: 160 [2024-11-14 04:14:22,617 INFO L226 Difference]: Without dead ends: 138 [2024-11-14 04:14:22,621 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14240 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=13353, Invalid=18153, Unknown=0, NotChecked=0, Total=31506 [2024-11-14 04:14:22,622 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:22,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 80 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:14:22,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-11-14 04:14:22,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2024-11-14 04:14:22,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0291970802919708) internal successors, (141), 137 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:22,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2024-11-14 04:14:22,639 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 77 [2024-11-14 04:14:22,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:22,640 INFO L471 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2024-11-14 04:14:22,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.0404624277456647) internal successors, (180), 172 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:22,640 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2024-11-14 04:14:22,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-11-14 04:14:22,642 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:22,643 INFO L215 NwaCegarLoop]: trace histogram [114, 14, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:22,659 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 04:14:22,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:22,843 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:14:22,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:22,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1324878295, now seen corresponding path program 8 times [2024-11-14 04:14:22,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:22,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793654139] [2024-11-14 04:14:22,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:22,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:23,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 6555 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-11-14 04:14:34,929 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:34,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793654139] [2024-11-14 04:14:34,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793654139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929561988] [2024-11-14 04:14:34,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:14:34,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:34,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:34,932 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:34,933 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:14:35,238 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 04:14:35,238 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:35,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:14:35,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:36,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2024-11-14 04:14:36,236 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:14:37,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6660 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 6555 trivial. 0 not checked. [2024-11-14 04:14:37,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929561988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:14:37,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1081909402] [2024-11-14 04:14:37,449 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:14:37,449 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:14:37,449 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:14:37,449 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:14:37,449 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:14:37,589 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:14:38,041 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4551#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:14:38,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:14:38,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:14:38,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 17, 17] total 147 [2024-11-14 04:14:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561403528] [2024-11-14 04:14:38,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:14:38,042 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2024-11-14 04:14:38,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:14:38,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2024-11-14 04:14:38,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=15269, Unknown=0, NotChecked=0, Total=22650 [2024-11-14 04:14:38,054 INFO L87 Difference]: Start difference. First operand 138 states and 141 transitions. Second operand has 147 states, 147 states have (on average 1.0612244897959184) internal successors, (156), 147 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:38,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:14:38,689 INFO L93 Difference]: Finished difference Result 381 states and 432 transitions. [2024-11-14 04:14:38,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2024-11-14 04:14:38,689 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.0612244897959184) internal successors, (156), 147 states have internal predecessors, (156), 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 135 [2024-11-14 04:14:38,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:14:38,692 INFO L225 Difference]: With dead ends: 381 [2024-11-14 04:14:38,692 INFO L226 Difference]: Without dead ends: 359 [2024-11-14 04:14:38,693 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 519 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4095 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=7381, Invalid=15269, Unknown=0, NotChecked=0, Total=22650 [2024-11-14 04:14:38,694 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 651 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:14:38,695 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 170 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:14:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2024-11-14 04:14:38,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 155. [2024-11-14 04:14:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:38,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2024-11-14 04:14:38,718 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 135 [2024-11-14 04:14:38,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:14:38,718 INFO L471 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2024-11-14 04:14:38,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.0612244897959184) internal successors, (156), 147 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:14:38,719 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2024-11-14 04:14:38,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2024-11-14 04:14:38,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:14:38,721 INFO L215 NwaCegarLoop]: trace histogram [115, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:14:38,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 04:14:38,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 04:14:38,922 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:14:38,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:14:38,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1075216431, now seen corresponding path program 9 times [2024-11-14 04:14:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:14:38,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731014631] [2024-11-14 04:14:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:14:38,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:14:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:14:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7135 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:14:49,839 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:14:49,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731014631] [2024-11-14 04:14:49,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731014631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:14:49,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142298221] [2024-11-14 04:14:49,839 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:14:49,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:14:49,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:14:49,841 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:14:49,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:14:50,265 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:14:50,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:14:50,271 INFO L255 TraceCheckSpWp]: Trace formula consists of 1212 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-14 04:14:50,277 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:14:58,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7135 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:14:58,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:15:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 7135 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:15:18,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142298221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:15:18,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [200502374] [2024-11-14 04:15:18,573 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:15:18,573 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:15:18,573 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:15:18,573 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:15:18,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:15:18,768 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:15:19,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6689#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:15:19,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:15:19,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:15:19,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117, 117] total 349 [2024-11-14 04:15:19,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063760531] [2024-11-14 04:15:19,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:15:19,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 350 states [2024-11-14 04:15:19,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:15:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 350 interpolants. [2024-11-14 04:15:19,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54535, Invalid=71135, Unknown=0, NotChecked=0, Total=125670 [2024-11-14 04:15:19,282 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 350 states, 350 states have (on average 1.02) internal successors, (357), 349 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:15:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:15:20,306 INFO L93 Difference]: Finished difference Result 310 states and 432 transitions. [2024-11-14 04:15:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-14 04:15:20,307 INFO L78 Accepts]: Start accepts. Automaton has has 350 states, 350 states have (on average 1.02) internal successors, (357), 349 states have internal predecessors, (357), 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 152 [2024-11-14 04:15:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:15:20,310 INFO L225 Difference]: With dead ends: 310 [2024-11-14 04:15:20,310 INFO L226 Difference]: Without dead ends: 272 [2024-11-14 04:15:20,314 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56366 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=54535, Invalid=71135, Unknown=0, NotChecked=0, Total=125670 [2024-11-14 04:15:20,315 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:15:20,315 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:15:20,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-14 04:15:20,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2024-11-14 04:15:20,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.014760147601476) internal successors, (275), 271 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:15:20,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 275 transitions. [2024-11-14 04:15:20,340 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 275 transitions. Word has length 152 [2024-11-14 04:15:20,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:15:20,340 INFO L471 AbstractCegarLoop]: Abstraction has 272 states and 275 transitions. [2024-11-14 04:15:20,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 350 states, 350 states have (on average 1.02) internal successors, (357), 349 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:15:20,341 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 275 transitions. [2024-11-14 04:15:20,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2024-11-14 04:15:20,345 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:15:20,346 INFO L215 NwaCegarLoop]: trace histogram [232, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:15:20,371 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 04:15:20,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:15:20,546 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:15:20,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:15:20,547 INFO L85 PathProgramCache]: Analyzing trace with hash -485271191, now seen corresponding path program 10 times [2024-11-14 04:15:20,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:15:20,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21275641] [2024-11-14 04:15:20,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:15:20,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:15:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 27493 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:16:05,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:16:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21275641] [2024-11-14 04:16:05,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21275641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:16:05,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550536721] [2024-11-14 04:16:05,298 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:16:05,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:16:05,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:16:05,301 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:16:05,347 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:16:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:16:06,184 INFO L255 TraceCheckSpWp]: Trace formula consists of 2265 conjuncts, 235 conjuncts are in the unsatisfiable core [2024-11-14 04:16:06,196 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:16:39,327 INFO L134 CoverageAnalysis]: Checked inductivity of 27493 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:16:39,327 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:18:10,874 INFO L134 CoverageAnalysis]: Checked inductivity of 27493 backedges. 0 proven. 27028 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:18:10,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550536721] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:18:10,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1704187773] [2024-11-14 04:18:10,876 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:18:10,876 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:18:10,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:18:10,877 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:18:10,877 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:18:11,071 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:18:11,913 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10147#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:18:11,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:18:11,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:18:11,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [234, 234, 234] total 700 [2024-11-14 04:18:11,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085312098] [2024-11-14 04:18:11,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:18:11,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 701 states [2024-11-14 04:18:11,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:18:11,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 701 interpolants. [2024-11-14 04:18:11,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218569, Invalid=279161, Unknown=0, NotChecked=0, Total=497730 [2024-11-14 04:18:11,970 INFO L87 Difference]: Start difference. First operand 272 states and 275 transitions. Second operand has 701 states, 701 states have (on average 1.0099857346647647) internal successors, (708), 700 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:18:18,803 INFO L93 Difference]: Finished difference Result 544 states and 783 transitions. [2024-11-14 04:18:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 468 states. [2024-11-14 04:18:18,805 INFO L78 Accepts]: Start accepts. Automaton has has 701 states, 701 states have (on average 1.0099857346647647) internal successors, (708), 700 states have internal predecessors, (708), 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 269 [2024-11-14 04:18:18,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:18:18,809 INFO L225 Difference]: With dead ends: 544 [2024-11-14 04:18:18,809 INFO L226 Difference]: Without dead ends: 506 [2024-11-14 04:18:18,825 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1039 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 704 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222272 ImplicationChecksByTransitivity, 154.8s TimeCoverageRelationStatistics Valid=218569, Invalid=279161, Unknown=0, NotChecked=0, Total=497730 [2024-11-14 04:18:18,826 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 0 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 623 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:18:18,826 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 72 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 623 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 04:18:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2024-11-14 04:18:18,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 506. [2024-11-14 04:18:18,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 1.007920792079208) internal successors, (509), 505 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 509 transitions. [2024-11-14 04:18:18,864 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 509 transitions. Word has length 269 [2024-11-14 04:18:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:18:18,864 INFO L471 AbstractCegarLoop]: Abstraction has 506 states and 509 transitions. [2024-11-14 04:18:18,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 701 states, 701 states have (on average 1.0099857346647647) internal successors, (708), 700 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:18:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 509 transitions. [2024-11-14 04:18:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2024-11-14 04:18:18,877 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:18:18,878 INFO L215 NwaCegarLoop]: trace histogram [466, 30, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:18:18,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 04:18:19,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:18:19,078 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:18:19,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:18:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash 57925929, now seen corresponding path program 11 times [2024-11-14 04:18:19,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:18:19,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879209234] [2024-11-14 04:18:19,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:18:19,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:18:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:20:59,494 INFO L134 CoverageAnalysis]: Checked inductivity of 109276 backedges. 0 proven. 108811 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2024-11-14 04:20:59,494 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:20:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879209234] [2024-11-14 04:20:59,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879209234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:20:59,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679219345] [2024-11-14 04:20:59,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:20:59,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:20:59,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:20:59,499 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:20:59,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:21:02,862 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 04:21:02,863 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:21:02,870 INFO L255 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 04:21:02,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:21:10,369 INFO L134 CoverageAnalysis]: Checked inductivity of 109276 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2024-11-14 04:21:10,369 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:21:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 109276 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 108811 trivial. 0 not checked. [2024-11-14 04:21:18,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679219345] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:21:18,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1364438901] [2024-11-14 04:21:18,616 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:21:18,616 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:21:18,617 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:21:18,617 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:21:18,617 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:21:18,717 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:21:20,203 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15775#(and (= |ULTIMATE.start_main_~i~1#1| 0) (= |ULTIMATE.start_main_~flag~0#1| 0) (not (= (select (select |#memory_int| |ULTIMATE.start_main_~#a~0#1.base|) |ULTIMATE.start_main_~#a~0#1.offset|) 0)))' at error location [2024-11-14 04:21:20,204 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:21:20,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:21:20,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [468, 33, 33] total 531 [2024-11-14 04:21:20,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049030710] [2024-11-14 04:21:20,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:21:20,205 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 531 states [2024-11-14 04:21:20,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:21:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 531 interpolants. [2024-11-14 04:21:20,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111957, Invalid=173733, Unknown=0, NotChecked=0, Total=285690 [2024-11-14 04:21:20,234 INFO L87 Difference]: Start difference. First operand 506 states and 509 transitions. Second operand has 531 states, 531 states have (on average 1.0169491525423728) internal successors, (540), 531 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:21:27,210 INFO L93 Difference]: Finished difference Result 1005 states and 1104 transitions. [2024-11-14 04:21:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 531 states. [2024-11-14 04:21:27,212 INFO L78 Accepts]: Start accepts. Automaton has has 531 states, 531 states have (on average 1.0169491525423728) internal successors, (540), 531 states have internal predecessors, (540), 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 503 [2024-11-14 04:21:27,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:21:27,216 INFO L225 Difference]: With dead ends: 1005 [2024-11-14 04:21:27,216 INFO L226 Difference]: Without dead ends: 967 [2024-11-14 04:21:27,225 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1975 GetRequests, 1442 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31215 ImplicationChecksByTransitivity, 123.8s TimeCoverageRelationStatistics Valid=111957, Invalid=173733, Unknown=0, NotChecked=0, Total=285690 [2024-11-14 04:21:27,226 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 1442 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1442 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:21:27,226 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1442 Valid, 345 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 04:21:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 967 states. [2024-11-14 04:21:27,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 967 to 539. [2024-11-14 04:21:27,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 538 states have (on average 1.0074349442379182) internal successors, (542), 538 states have internal predecessors, (542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:27,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 542 transitions. [2024-11-14 04:21:27,285 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 542 transitions. Word has length 503 [2024-11-14 04:21:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:21:27,286 INFO L471 AbstractCegarLoop]: Abstraction has 539 states and 542 transitions. [2024-11-14 04:21:27,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 531 states, 531 states have (on average 1.0169491525423728) internal successors, (540), 531 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:21:27,288 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 542 transitions. [2024-11-14 04:21:27,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2024-11-14 04:21:27,292 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:21:27,292 INFO L215 NwaCegarLoop]: trace histogram [467, 62, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:21:27,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-14 04:21:27,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:21:27,493 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:21:27,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:21:27,493 INFO L85 PathProgramCache]: Analyzing trace with hash -377605585, now seen corresponding path program 12 times [2024-11-14 04:21:27,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:21:27,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686211451] [2024-11-14 04:21:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:21:27,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:21:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:24:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 111231 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2024-11-14 04:24:01,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:24:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686211451] [2024-11-14 04:24:01,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686211451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:24:01,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785246163] [2024-11-14 04:24:01,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:24:01,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:24:01,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:24:01,594 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:24:01,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8c8238e9-ec41-4dd7-b70f-3932bef9a89e/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:24:02,983 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:24:02,983 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:24:03,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 4508 conjuncts, 470 conjuncts are in the unsatisfiable core [2024-11-14 04:24:03,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:25:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 111231 backedges. 0 proven. 109278 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2024-11-14 04:25:50,536 INFO L311 TraceCheckSpWp]: Computing backward predicates...