./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array29_pattern.c --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_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/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_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-patterns/array29_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/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_a7b2eeec-d6da-409b-94a2-647deb50e368/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 c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 02:44:18,478 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 02:44:18,577 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 02:44:18,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 02:44:18,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 02:44:18,641 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 02:44:18,642 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 02:44:18,642 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 02:44:18,643 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 02:44:18,643 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 02:44:18,645 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 02:44:18,645 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 02:44:18,645 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 02:44:18,645 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 02:44:18,645 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 02:44:18,645 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 02:44:18,645 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 02:44:18,646 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 02:44:18,647 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 02:44:18,647 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 02:44:18,647 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 02:44:18,647 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 02:44:18,648 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 02:44:18,648 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 02:44:18,648 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 02:44:18,648 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 02:44:18,648 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 02:44:18,648 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 02:44:18,648 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 02:44:18,649 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 02:44:18,649 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:44:18,650 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 02:44:18,650 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 02:44:18,650 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_a7b2eeec-d6da-409b-94a2-647deb50e368/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 -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2024-11-14 02:44:19,089 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 02:44:19,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 02:44:19,109 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 02:44:19,110 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 02:44:19,112 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 02:44:19,115 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-patterns/array29_pattern.c Unable to find full path for "g++" [2024-11-14 02:44:21,499 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 02:44:21,823 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 02:44:21,824 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/sv-benchmarks/c/array-patterns/array29_pattern.c [2024-11-14 02:44:21,835 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/data/1f5e446a2/a7753fb6c65a4722af4f328b3876debf/FLAG8346c059d [2024-11-14 02:44:21,874 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/data/1f5e446a2/a7753fb6c65a4722af4f328b3876debf [2024-11-14 02:44:21,879 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 02:44:21,882 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 02:44:21,895 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 02:44:21,895 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 02:44:21,902 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 02:44:21,904 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:44:21" (1/1) ... [2024-11-14 02:44:21,905 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@151f635a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:21, skipping insertion in model container [2024-11-14 02:44:21,905 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 02:44:21" (1/1) ... [2024-11-14 02:44:21,931 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 02:44:22,164 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_a7b2eeec-d6da-409b-94a2-647deb50e368/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2024-11-14 02:44:22,202 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:44:22,214 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 02:44:22,229 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_a7b2eeec-d6da-409b-94a2-647deb50e368/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2024-11-14 02:44:22,244 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 02:44:22,267 INFO L204 MainTranslator]: Completed translation [2024-11-14 02:44:22,268 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22 WrapperNode [2024-11-14 02:44:22,268 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 02:44:22,272 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 02:44:22,272 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 02:44:22,272 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 02:44:22,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,290 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,311 INFO L138 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2024-11-14 02:44:22,312 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 02:44:22,312 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 02:44:22,312 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 02:44:22,313 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 02:44:22,318 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,321 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,321 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,326 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,331 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,332 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,333 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,335 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 02:44:22,336 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 02:44:22,336 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 02:44:22,336 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 02:44:22,337 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (1/1) ... [2024-11-14 02:44:22,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 02:44:22,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:22,378 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 02:44:22,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 02:44:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 02:44:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 02:44:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 02:44:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 02:44:22,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 02:44:22,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 02:44:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 02:44:22,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 02:44:22,510 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 02:44:22,513 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 02:44:22,757 INFO L? ?]: Removed 14 outVars from TransFormulas that were not future-live. [2024-11-14 02:44:22,757 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 02:44:22,886 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 02:44:22,886 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-14 02:44:22,887 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:44:22 BoogieIcfgContainer [2024-11-14 02:44:22,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 02:44:22,894 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 02:44:22,894 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 02:44:22,902 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 02:44:22,903 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 02:44:21" (1/3) ... [2024-11-14 02:44:22,903 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb2f620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:44:22, skipping insertion in model container [2024-11-14 02:44:22,904 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 02:44:22" (2/3) ... [2024-11-14 02:44:22,905 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb2f620 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 02:44:22, skipping insertion in model container [2024-11-14 02:44:22,905 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 02:44:22" (3/3) ... [2024-11-14 02:44:22,907 INFO L112 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2024-11-14 02:44:22,934 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 02:44:22,935 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG array29_pattern.c that has 1 procedures, 10 locations, 1 initial locations, 4 loop locations, and 1 error locations. [2024-11-14 02:44:23,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 02:44:23,025 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;@1fef6ea9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 02:44:23,025 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 02:44:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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 02:44:23,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 02:44:23,037 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:23,038 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 02:44:23,038 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:23,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:23,045 INFO L85 PathProgramCache]: Analyzing trace with hash 114279461, now seen corresponding path program 1 times [2024-11-14 02:44:23,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:23,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476005997] [2024-11-14 02:44:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:23,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:23,397 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 02:44:23,397 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476005997] [2024-11-14 02:44:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476005997] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:23,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:44:23,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 02:44:23,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51334253] [2024-11-14 02:44:23,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:23,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 02:44:23,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 02:44:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 02:44:23,439 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:23,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:23,500 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2024-11-14 02:44:23,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 02:44:23,504 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 02:44:23,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:23,512 INFO L225 Difference]: With dead ends: 19 [2024-11-14 02:44:23,513 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 02:44:23,516 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 02:44:23,520 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 2 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:23,522 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 8 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:44:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 02:44:23,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2024-11-14 02:44:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:23,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2024-11-14 02:44:23,556 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 5 [2024-11-14 02:44:23,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:23,556 INFO L471 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2024-11-14 02:44:23,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:23,557 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2024-11-14 02:44:23,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 02:44:23,558 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:23,558 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:23,558 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 02:44:23,559 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:23,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:23,560 INFO L85 PathProgramCache]: Analyzing trace with hash 583338315, now seen corresponding path program 1 times [2024-11-14 02:44:23,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:23,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96422444] [2024-11-14 02:44:23,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:23,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:23,740 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:44:23,740 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:23,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96422444] [2024-11-14 02:44:23,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96422444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:23,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:44:23,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:44:23,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879169396] [2024-11-14 02:44:23,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:23,742 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:44:23,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:23,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:44:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:44:23,743 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 02:44:23,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:23,792 INFO L93 Difference]: Finished difference Result 18 states and 26 transitions. [2024-11-14 02:44:23,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:44:23,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 02:44:23,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:23,793 INFO L225 Difference]: With dead ends: 18 [2024-11-14 02:44:23,793 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 02:44:23,793 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:44:23,794 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:23,795 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 02:44:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 02:44:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 02:44:23,799 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 02:44:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2024-11-14 02:44:23,800 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 7 [2024-11-14 02:44:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:23,800 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2024-11-14 02:44:23,801 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 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 02:44:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2024-11-14 02:44:23,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 02:44:23,827 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:23,827 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:23,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 02:44:23,828 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:23,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:23,829 INFO L85 PathProgramCache]: Analyzing trace with hash 850704006, now seen corresponding path program 1 times [2024-11-14 02:44:23,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:23,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565995693] [2024-11-14 02:44:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:23,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:24,017 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:24,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565995693] [2024-11-14 02:44:24,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565995693] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 02:44:24,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 02:44:24,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 02:44:24,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358370512] [2024-11-14 02:44:24,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 02:44:24,018 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 02:44:24,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 02:44:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:44:24,020 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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 02:44:24,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:24,080 INFO L93 Difference]: Finished difference Result 19 states and 24 transitions. [2024-11-14 02:44:24,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 02:44:24,081 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 02:44:24,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:24,084 INFO L225 Difference]: With dead ends: 19 [2024-11-14 02:44:24,084 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 02:44:24,084 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 02:44:24,085 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 11 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:24,086 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:44:24,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 02:44:24,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 12. [2024-11-14 02:44:24,098 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 02:44:24,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2024-11-14 02:44:24,099 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 8 [2024-11-14 02:44:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:24,100 INFO L471 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2024-11-14 02:44:24,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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 02:44:24,100 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2024-11-14 02:44:24,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 02:44:24,101 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:24,102 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:24,102 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 02:44:24,102 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:24,103 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:24,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1746990304, now seen corresponding path program 1 times [2024-11-14 02:44:24,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:24,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270000732] [2024-11-14 02:44:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:24,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:24,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:24,277 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:24,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270000732] [2024-11-14 02:44:24,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270000732] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043333168] [2024-11-14 02:44:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:24,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:24,281 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:24,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 02:44:24,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:24,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:44:24,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:24,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 02:44:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043333168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:24,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2108963579] [2024-11-14 02:44:24,576 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:44:24,577 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:24,580 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:24,586 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:24,586 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:26,828 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:45,593 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '165#true' at error location [2024-11-14 02:44:45,593 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:45,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:45,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-14 02:44:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767714309] [2024-11-14 02:44:45,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:45,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-14 02:44:45,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:45,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-14 02:44:45,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=69, Unknown=8, NotChecked=0, Total=110 [2024-11-14 02:44:45,597 INFO L87 Difference]: Start difference. First operand 12 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:45,709 INFO L93 Difference]: Finished difference Result 24 states and 32 transitions. [2024-11-14 02:44:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:44:45,710 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 02:44:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:45,710 INFO L225 Difference]: With dead ends: 24 [2024-11-14 02:44:45,710 INFO L226 Difference]: Without dead ends: 14 [2024-11-14 02:44:45,711 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 18.9s TimeCoverageRelationStatistics Valid=33, Invalid=69, Unknown=8, NotChecked=0, Total=110 [2024-11-14 02:44:45,713 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:45,714 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 8 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:44:45,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-11-14 02:44:45,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-11-14 02:44:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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 02:44:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2024-11-14 02:44:45,722 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 11 [2024-11-14 02:44:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:45,723 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2024-11-14 02:44:45,723 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2024-11-14 02:44:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-14 02:44:45,724 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:45,724 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:45,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 02:44:45,929 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:45,929 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:45,930 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:45,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1033252803, now seen corresponding path program 2 times [2024-11-14 02:44:45,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:45,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032186284] [2024-11-14 02:44:45,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:45,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:45,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:46,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:44:46,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:46,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032186284] [2024-11-14 02:44:46,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032186284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:46,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475288157] [2024-11-14 02:44:46,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:44:46,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:46,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:46,026 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:46,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 02:44:46,097 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-14 02:44:46,097 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:46,098 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-14 02:44:46,099 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:44:46,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-14 02:44:46,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475288157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:46,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940467181] [2024-11-14 02:44:46,193 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:44:46,193 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:46,194 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:46,195 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:46,195 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:47,448 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:44:48,367 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '379#(exists ((|v_ULTIMATE.start_main_~sum~0#1_34| Int) (|v_ULTIMATE.start_main_~row~0#1_76| Int)) (and (not (= (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0) (+ (* 2 |v_ULTIMATE.start_main_~sum~0#1_34|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))))) (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_76|) (<= 1 ~ARR_SIZE~0)))' at error location [2024-11-14 02:44:48,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:44:48,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:44:48,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2024-11-14 02:44:48,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504542160] [2024-11-14 02:44:48,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:44:48,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-14 02:44:48,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:44:48,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-14 02:44:48,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:44:48,370 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:44:48,448 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2024-11-14 02:44:48,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 02:44:48,448 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-14 02:44:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:44:48,449 INFO L225 Difference]: With dead ends: 29 [2024-11-14 02:44:48,449 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 02:44:48,449 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-14 02:44:48,450 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 6 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:44:48,450 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 9 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:44:48,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 02:44:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2024-11-14 02:44:48,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 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 02:44:48,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-11-14 02:44:48,463 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2024-11-14 02:44:48,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:44:48,463 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-11-14 02:44:48,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:44:48,463 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-11-14 02:44:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 02:44:48,464 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:44:48,464 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 02:44:48,487 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 02:44:48,664 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:48,665 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:44:48,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:44:48,666 INFO L85 PathProgramCache]: Analyzing trace with hash 75159235, now seen corresponding path program 3 times [2024-11-14 02:44:48,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:44:48,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490914067] [2024-11-14 02:44:48,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:44:48,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:44:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:44:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-11-14 02:44:48,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:44:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490914067] [2024-11-14 02:44:48,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490914067] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:44:48,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766354781] [2024-11-14 02:44:48,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:44:48,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:44:48,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:44:48,846 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:44:48,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 02:44:48,919 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:44:48,919 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:44:48,920 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 02:44:48,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:44:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:44:49,057 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:44:49,156 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 02:44:49,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766354781] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:44:49,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1905192078] [2024-11-14 02:44:49,159 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:44:49,161 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:44:49,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:44:49,162 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:44:49,162 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:44:50,081 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:45:12,781 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '468#true' at error location [2024-11-14 02:45:12,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:45:12,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:45:12,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2024-11-14 02:45:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400378678] [2024-11-14 02:45:12,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:45:12,782 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-14 02:45:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-14 02:45:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=107, Unknown=10, NotChecked=0, Total=156 [2024-11-14 02:45:12,783 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 02:45:25,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:25,253 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2024-11-14 02:45:25,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 02:45:25,254 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 02:45:25,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:25,254 INFO L225 Difference]: With dead ends: 31 [2024-11-14 02:45:25,255 INFO L226 Difference]: Without dead ends: 28 [2024-11-14 02:45:25,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 35.2s TimeCoverageRelationStatistics Valid=94, Invalid=232, Unknown=16, NotChecked=0, Total=342 [2024-11-14 02:45:25,256 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:25,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 02:45:25,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-11-14 02:45:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2024-11-14 02:45:25,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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 02:45:25,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-11-14 02:45:25,263 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2024-11-14 02:45:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:25,264 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-11-14 02:45:25,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 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 02:45:25,264 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-11-14 02:45:25,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 02:45:25,265 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:25,265 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 02:45:25,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-14 02:45:25,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 02:45:25,466 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:25,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:25,466 INFO L85 PathProgramCache]: Analyzing trace with hash -554096043, now seen corresponding path program 4 times [2024-11-14 02:45:25,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:25,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603235046] [2024-11-14 02:45:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:25,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:45:25,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744593731] [2024-11-14 02:45:25,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:45:25,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:25,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:25,549 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:25,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 02:45:25,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:25,766 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 02:45:25,774 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:25,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:45:25,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 02:45:26,152 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:26,153 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-14 02:45:26,261 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:26,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-14 02:45:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:27,099 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:29,100 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:29,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 47 treesize of output 63 [2024-11-14 02:45:30,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 486 treesize of output 462 [2024-11-14 02:45:30,854 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:30,854 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 38 treesize of output 52 [2024-11-14 02:45:30,882 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:30,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-14 02:45:31,022 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:45:31,035 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 1866 treesize of output 1786 [2024-11-14 02:45:31,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 118 [2024-11-14 02:45:31,255 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:45:31,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 3698 treesize of output 3615 [2024-11-14 02:45:32,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:45:32,484 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603235046] [2024-11-14 02:45:32,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:45:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744593731] [2024-11-14 02:45:32,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744593731] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:32,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1625907866] [2024-11-14 02:45:32,486 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:45:32,487 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:32,487 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:32,487 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:32,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:33,468 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:45:36,172 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '839#(exists ((|v_ULTIMATE.start_main_~sum~0#1_55| Int) (|v_ULTIMATE.start_main_~row~0#1_111| Int)) (and (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_111|) (not (= (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0) (+ (* 2 |v_ULTIMATE.start_main_~sum~0#1_55|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))))) (<= 1 ~ARR_SIZE~0)))' at error location [2024-11-14 02:45:36,172 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:45:36,172 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:45:36,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2024-11-14 02:45:36,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940619260] [2024-11-14 02:45:36,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:45:36,173 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 02:45:36,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:45:36,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 02:45:36,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 02:45:36,175 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:38,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:45:38,185 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2024-11-14 02:45:38,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 02:45:38,185 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 02:45:38,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:45:38,186 INFO L225 Difference]: With dead ends: 58 [2024-11-14 02:45:38,186 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 02:45:38,188 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=298, Invalid=2152, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 02:45:38,189 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 6 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:45:38,189 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 41 Invalid, 602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-11-14 02:45:38,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 02:45:38,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2024-11-14 02:45:38,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 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 02:45:38,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2024-11-14 02:45:38,202 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 21 [2024-11-14 02:45:38,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:45:38,202 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2024-11-14 02:45:38,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:45:38,202 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2024-11-14 02:45:38,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:45:38,203 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:45:38,203 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 02:45:38,221 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 02:45:38,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 02:45:38,406 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:45:38,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:45:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash -586705840, now seen corresponding path program 5 times [2024-11-14 02:45:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:45:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758143304] [2024-11-14 02:45:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:45:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:45:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:45:38,682 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-14 02:45:38,682 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:45:38,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758143304] [2024-11-14 02:45:38,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758143304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:45:38,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31925293] [2024-11-14 02:45:38,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:45:38,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:45:38,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:45:38,686 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:45:38,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 02:45:38,897 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-14 02:45:38,897 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:45:38,898 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:45:38,900 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:45:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 02:45:38,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:45:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-11-14 02:45:39,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [31925293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:45:39,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [253065253] [2024-11-14 02:45:39,097 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:45:39,097 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:45:39,097 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:45:39,097 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:45:39,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:45:39,726 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:46:14,279 WARN L286 SmtUtils]: Spent 6.03s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-14 02:46:14,285 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1041#true' at error location [2024-11-14 02:46:14,285 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:46:14,285 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:46:14,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 02:46:14,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366953330] [2024-11-14 02:46:14,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:46:14,286 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 02:46:14,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:46:14,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 02:46:14,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=198, Unknown=14, NotChecked=0, Total=272 [2024-11-14 02:46:14,287 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:46:20,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:46:20,608 INFO L93 Difference]: Finished difference Result 79 states and 102 transitions. [2024-11-14 02:46:20,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 02:46:20,609 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 02:46:20,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:46:20,611 INFO L225 Difference]: With dead ends: 79 [2024-11-14 02:46:20,611 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 02:46:20,611 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 40.9s TimeCoverageRelationStatistics Valid=84, Invalid=279, Unknown=17, NotChecked=0, Total=380 [2024-11-14 02:46:20,612 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:46:20,612 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 16 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:46:20,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 02:46:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2024-11-14 02:46:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:46:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2024-11-14 02:46:20,629 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 22 [2024-11-14 02:46:20,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:46:20,629 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2024-11-14 02:46:20,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:46:20,629 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2024-11-14 02:46:20,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 02:46:20,630 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:46:20,630 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 02:46:20,635 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 02:46:20,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:46:20,831 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:46:20,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:46:20,831 INFO L85 PathProgramCache]: Analyzing trace with hash -32118333, now seen corresponding path program 6 times [2024-11-14 02:46:20,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:46:20,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450182810] [2024-11-14 02:46:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:46:20,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:46:20,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:46:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:46:21,014 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:46:21,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450182810] [2024-11-14 02:46:21,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450182810] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:46:21,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795310980] [2024-11-14 02:46:21,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:46:21,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:46:21,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:46:21,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:46:21,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 02:46:21,098 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:46:21,099 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:46:21,100 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:46:21,101 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:46:21,230 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:46:21,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:46:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-14 02:46:21,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795310980] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:46:21,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1669803331] [2024-11-14 02:46:21,339 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:46:21,339 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:46:21,339 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:46:21,339 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:46:21,340 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:46:21,953 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:46:52,683 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1407#true' at error location [2024-11-14 02:46:52,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:46:52,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:46:52,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-11-14 02:46:52,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943188351] [2024-11-14 02:46:52,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:46:52,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-14 02:46:52,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:46:52,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-14 02:46:52,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=199, Unknown=14, NotChecked=0, Total=272 [2024-11-14 02:46:52,686 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 02:46:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:46:56,928 INFO L93 Difference]: Finished difference Result 63 states and 78 transitions. [2024-11-14 02:46:56,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-14 02:46:56,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 22 [2024-11-14 02:46:56,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:46:56,930 INFO L225 Difference]: With dead ends: 63 [2024-11-14 02:46:56,930 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 02:46:56,933 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=78, Invalid=248, Unknown=16, NotChecked=0, Total=342 [2024-11-14 02:46:56,933 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:46:56,933 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 15 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:46:56,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 02:46:56,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 02:46:56,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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 02:46:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2024-11-14 02:46:56,950 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 22 [2024-11-14 02:46:56,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:46:56,950 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2024-11-14 02:46:56,951 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 14 states have internal predecessors, (28), 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 02:46:56,952 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2024-11-14 02:46:56,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 02:46:56,952 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:46:56,952 INFO L215 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-14 02:46:56,978 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 02:46:57,157 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:46:57,157 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:46:57,157 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:46:57,158 INFO L85 PathProgramCache]: Analyzing trace with hash 836026949, now seen corresponding path program 7 times [2024-11-14 02:46:57,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:46:57,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605973217] [2024-11-14 02:46:57,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:46:57,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:46:57,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:46:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:46:57,455 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:46:57,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605973217] [2024-11-14 02:46:57,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605973217] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:46:57,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601301514] [2024-11-14 02:46:57,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:46:57,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:46:57,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:46:57,459 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:46:57,461 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 02:46:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:46:57,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 02:46:57,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:46:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:46:57,816 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:46:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-11-14 02:46:57,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601301514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:46:57,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [392577661] [2024-11-14 02:46:57,926 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:46:57,926 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:46:57,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:46:57,927 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:46:57,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:46:58,669 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:46:59,429 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1881#(exists ((|v_ULTIMATE.start_main_~sum~0#1_84| Int) (|v_ULTIMATE.start_main_~row~0#1_160| Int)) (and (not (= (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0) (+ (* 2 |v_ULTIMATE.start_main_~sum~0#1_84|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))))) (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_160|) (<= 1 ~ARR_SIZE~0)))' at error location [2024-11-14 02:46:59,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:46:59,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:46:59,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-14 02:46:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048545892] [2024-11-14 02:46:59,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:46:59,430 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 02:46:59,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:46:59,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 02:46:59,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-11-14 02:46:59,431 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:46:59,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:46:59,769 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2024-11-14 02:46:59,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 02:46:59,770 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 25 [2024-11-14 02:46:59,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:46:59,770 INFO L225 Difference]: With dead ends: 58 [2024-11-14 02:46:59,770 INFO L226 Difference]: Without dead ends: 44 [2024-11-14 02:46:59,771 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2024-11-14 02:46:59,772 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:46:59,772 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 12 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:46:59,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-11-14 02:46:59,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 36. [2024-11-14 02:46:59,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:46:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2024-11-14 02:46:59,783 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2024-11-14 02:46:59,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:46:59,783 INFO L471 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2024-11-14 02:46:59,783 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 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 02:46:59,783 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2024-11-14 02:46:59,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-11-14 02:46:59,784 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:46:59,784 INFO L215 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-14 02:46:59,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 02:46:59,988 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:46:59,988 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:46:59,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:46:59,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1482826848, now seen corresponding path program 8 times [2024-11-14 02:46:59,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:46:59,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117440338] [2024-11-14 02:46:59,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:46:59,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:47:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:47:00,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502924302] [2024-11-14 02:47:00,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:47:00,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:47:00,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:47:00,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:47:00,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 02:47:01,460 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 02:47:01,460 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:47:01,464 WARN L253 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 135 conjuncts are in the unsatisfiable core [2024-11-14 02:47:01,472 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:47:01,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:47:01,582 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 02:47:01,659 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:01,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-14 02:47:01,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:01,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:01,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:01,917 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:01,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 40 [2024-11-14 02:47:02,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,057 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:02,057 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 54 [2024-11-14 02:47:02,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 02:47:02,190 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:02,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 57 treesize of output 68 [2024-11-14 02:47:02,495 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:02,495 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-11-14 02:47:02,637 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:02,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-11-14 02:47:02,794 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:02,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2024-11-14 02:47:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:05,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:47:13,741 INFO L349 Elim1Store]: treesize reduction 182, result has 8.5 percent of original size [2024-11-14 02:47:13,741 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 93 treesize of output 60 [2024-11-14 02:47:18,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2024-11-14 02:47:18,798 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 6 [2024-11-14 02:47:19,063 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:19,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 29 treesize of output 43 [2024-11-14 02:47:19,085 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:47:19,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 8 [2024-11-14 02:47:19,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 83 [2024-11-14 02:47:19,153 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:47:19,154 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:47:19,155 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:47:19,156 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 02:47:19,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2024-11-14 02:47:19,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2024-11-14 02:47:20,173 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 3 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:47:20,174 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:47:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117440338] [2024-11-14 02:47:20,174 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-11-14 02:47:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502924302] [2024-11-14 02:47:20,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502924302] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:47:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1305578443] [2024-11-14 02:47:20,176 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:47:20,176 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:47:20,176 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:47:20,176 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:47:20,176 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:47:20,687 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:47:50,609 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2078#true' at error location [2024-11-14 02:47:50,609 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:47:50,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-14 02:47:50,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 65 [2024-11-14 02:47:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537895662] [2024-11-14 02:47:50,610 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-14 02:47:50,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-11-14 02:47:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:47:50,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-11-14 02:47:50,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=692, Invalid=3991, Unknown=9, NotChecked=0, Total=4692 [2024-11-14 02:47:50,615 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 02:49:41,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:49:41,195 INFO L93 Difference]: Finished difference Result 137 states and 183 transitions. [2024-11-14 02:49:41,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-11-14 02:49:41,196 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2024-11-14 02:49:41,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:49:41,197 INFO L225 Difference]: With dead ends: 137 [2024-11-14 02:49:41,197 INFO L226 Difference]: Without dead ends: 121 [2024-11-14 02:49:41,201 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4267 ImplicationChecksByTransitivity, 148.9s TimeCoverageRelationStatistics Valid=2044, Invalid=11716, Unknown=46, NotChecked=0, Total=13806 [2024-11-14 02:49:41,203 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2024-11-14 02:49:41,203 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 70 Invalid, 1616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1394 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2024-11-14 02:49:41,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-11-14 02:49:41,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2024-11-14 02:49:41,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.3211009174311927) internal successors, (144), 109 states have internal predecessors, (144), 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 02:49:41,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 144 transitions. [2024-11-14 02:49:41,297 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 144 transitions. Word has length 35 [2024-11-14 02:49:41,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:49:41,297 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 144 transitions. [2024-11-14 02:49:41,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 65 states have internal predecessors, (69), 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 02:49:41,297 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 144 transitions. [2024-11-14 02:49:41,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-11-14 02:49:41,298 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:49:41,298 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-14 02:49:41,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 02:49:41,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:49:41,499 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:49:41,499 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:49:41,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1241997784, now seen corresponding path program 9 times [2024-11-14 02:49:41,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:49:41,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889877324] [2024-11-14 02:49:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:49:41,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:49:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:49:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 29 proven. 65 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 02:49:41,814 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:49:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889877324] [2024-11-14 02:49:41,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889877324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:49:41,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775865160] [2024-11-14 02:49:41,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:49:41,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:49:41,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:49:41,817 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:49:41,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 02:49:41,929 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:49:41,929 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:49:41,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:49:41,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:49:42,130 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 56 proven. 38 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 02:49:42,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:49:42,355 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 24 proven. 70 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-11-14 02:49:42,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775865160] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:49:42,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650016740] [2024-11-14 02:49:42,357 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:49:42,357 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:49:42,357 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:49:42,357 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:49:42,357 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:49:43,039 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:50:18,710 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2931#true' at error location [2024-11-14 02:50:18,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:50:18,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:50:18,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 02:50:18,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129626436] [2024-11-14 02:50:18,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:50:18,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 02:50:18,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:50:18,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 02:50:18,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=283, Unknown=16, NotChecked=0, Total=380 [2024-11-14 02:50:18,712 INFO L87 Difference]: Start difference. First operand 110 states and 144 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 02:50:25,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:50:25,119 INFO L93 Difference]: Finished difference Result 243 states and 317 transitions. [2024-11-14 02:50:25,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-14 02:50:25,120 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2024-11-14 02:50:25,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:50:25,121 INFO L225 Difference]: With dead ends: 243 [2024-11-14 02:50:25,121 INFO L226 Difference]: Without dead ends: 148 [2024-11-14 02:50:25,122 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 42.1s TimeCoverageRelationStatistics Valid=114, Invalid=373, Unknown=19, NotChecked=0, Total=506 [2024-11-14 02:50:25,122 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:50:25,122 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 19 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:50:25,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-14 02:50:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 135. [2024-11-14 02:50:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.2238805970149254) internal successors, (164), 134 states have internal predecessors, (164), 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 02:50:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 164 transitions. [2024-11-14 02:50:25,272 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 164 transitions. Word has length 36 [2024-11-14 02:50:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:50:25,272 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 164 transitions. [2024-11-14 02:50:25,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 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 02:50:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 164 transitions. [2024-11-14 02:50:25,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-14 02:50:25,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:50:25,274 INFO L215 NwaCegarLoop]: trace histogram [12, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2024-11-14 02:50:25,293 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 02:50:25,474 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:50:25,474 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:50:25,475 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:50:25,475 INFO L85 PathProgramCache]: Analyzing trace with hash 266421545, now seen corresponding path program 10 times [2024-11-14 02:50:25,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:50:25,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31056566] [2024-11-14 02:50:25,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:50:25,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:50:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:50:25,887 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 3 proven. 88 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-14 02:50:25,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:50:25,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31056566] [2024-11-14 02:50:25,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31056566] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:50:25,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195198542] [2024-11-14 02:50:25,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:50:25,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:50:25,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:50:25,891 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:50:25,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 02:50:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:50:26,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:50:26,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:50:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-14 02:50:26,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:50:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2024-11-14 02:50:26,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195198542] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:50:26,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1087763533] [2024-11-14 02:50:26,604 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:50:26,605 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:50:26,605 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:50:26,605 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:50:26,605 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:50:27,210 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:50:28,138 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4157#(exists ((|v_ULTIMATE.start_main_~row~0#1_222| Int) (|v_ULTIMATE.start_main_~sum~0#1_137| Int)) (and (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_222|) (not (= (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0) (+ (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0)) (* 2 |v_ULTIMATE.start_main_~sum~0#1_137|)))) (<= 1 ~ARR_SIZE~0)))' at error location [2024-11-14 02:50:28,138 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:50:28,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:50:28,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-11-14 02:50:28,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34567532] [2024-11-14 02:50:28,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:50:28,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 02:50:28,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:50:28,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 02:50:28,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2024-11-14 02:50:28,139 INFO L87 Difference]: Start difference. First operand 135 states and 164 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:50:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:50:28,741 INFO L93 Difference]: Finished difference Result 253 states and 302 transitions. [2024-11-14 02:50:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 02:50:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2024-11-14 02:50:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:50:28,743 INFO L225 Difference]: With dead ends: 253 [2024-11-14 02:50:28,743 INFO L226 Difference]: Without dead ends: 184 [2024-11-14 02:50:28,744 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 93 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 02:50:28,745 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:50:28,745 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:50:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-11-14 02:50:28,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 134. [2024-11-14 02:50:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1879699248120301) internal successors, (158), 133 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 02:50:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 158 transitions. [2024-11-14 02:50:28,852 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 158 transitions. Word has length 39 [2024-11-14 02:50:28,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:50:28,853 INFO L471 AbstractCegarLoop]: Abstraction has 134 states and 158 transitions. [2024-11-14 02:50:28,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:50:28,853 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 158 transitions. [2024-11-14 02:50:28,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-11-14 02:50:28,854 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:50:28,854 INFO L215 NwaCegarLoop]: trace histogram [12, 9, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-11-14 02:50:28,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 02:50:29,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 02:50:29,055 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:50:29,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:50:29,055 INFO L85 PathProgramCache]: Analyzing trace with hash 626288390, now seen corresponding path program 11 times [2024-11-14 02:50:29,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:50:29,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735806189] [2024-11-14 02:50:29,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:50:29,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:50:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:50:29,426 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 74 proven. 73 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-11-14 02:50:29,426 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:50:29,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735806189] [2024-11-14 02:50:29,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735806189] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:50:29,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460250478] [2024-11-14 02:50:29,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 02:50:29,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:50:29,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:50:29,430 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:50:29,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 02:50:30,046 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 02:50:30,046 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:50:30,049 INFO L255 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:50:30,051 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:50:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 106 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 02:50:30,333 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:50:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 106 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-11-14 02:50:30,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460250478] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:50:30,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [687179328] [2024-11-14 02:50:30,525 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:50:30,525 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:50:30,525 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:50:30,525 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:50:30,525 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:50:31,139 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:51:13,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4942#true' at error location [2024-11-14 02:51:13,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:51:13,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:51:13,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 20 [2024-11-14 02:51:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394229915] [2024-11-14 02:51:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:51:13,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-14 02:51:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:51:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-14 02:51:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=398, Unknown=20, NotChecked=0, Total=506 [2024-11-14 02:51:13,929 INFO L87 Difference]: Start difference. First operand 134 states and 158 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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 02:52:40,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:40,330 INFO L93 Difference]: Finished difference Result 190 states and 220 transitions. [2024-11-14 02:52:40,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 02:52:40,331 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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 40 [2024-11-14 02:52:40,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:40,333 INFO L225 Difference]: With dead ends: 190 [2024-11-14 02:52:40,333 INFO L226 Difference]: Without dead ends: 140 [2024-11-14 02:52:40,334 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 100 SyntacticMatches, 8 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 129.0s TimeCoverageRelationStatistics Valid=852, Invalid=3246, Unknown=62, NotChecked=0, Total=4160 [2024-11-14 02:52:40,335 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 77 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:40,336 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 22 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 02:52:40,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-11-14 02:52:40,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2024-11-14 02:52:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.1801801801801801) internal successors, (131), 111 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:40,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 131 transitions. [2024-11-14 02:52:40,480 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 131 transitions. Word has length 40 [2024-11-14 02:52:40,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:40,480 INFO L471 AbstractCegarLoop]: Abstraction has 112 states and 131 transitions. [2024-11-14 02:52:40,481 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 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 02:52:40,481 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 131 transitions. [2024-11-14 02:52:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-11-14 02:52:40,482 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:40,482 INFO L215 NwaCegarLoop]: trace histogram [15, 9, 4, 4, 3, 3, 1, 1, 1, 1, 1] [2024-11-14 02:52:40,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 02:52:40,683 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 02:52:40,683 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:52:40,684 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:40,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1294412850, now seen corresponding path program 12 times [2024-11-14 02:52:40,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:40,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827901284] [2024-11-14 02:52:40,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 22 proven. 101 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-14 02:52:41,105 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 02:52:41,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827901284] [2024-11-14 02:52:41,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827901284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 02:52:41,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909382004] [2024-11-14 02:52:41,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 02:52:41,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:41,108 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:41,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 02:52:41,271 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 02:52:41,271 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 02:52:41,273 INFO L255 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 02:52:41,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 57 proven. 66 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-14 02:52:41,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:52:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 13 proven. 110 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2024-11-14 02:52:41,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909382004] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 02:52:41,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2043273381] [2024-11-14 02:52:41,611 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 02:52:41,611 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 02:52:41,612 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 02:52:41,612 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 02:52:41,612 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 02:52:42,277 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 02:52:43,151 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6142#(exists ((|v_ULTIMATE.start_main_~row~0#1_267| Int) (|v_ULTIMATE.start_main_~sum~0#1_168| Int)) (and (<= ~ARR_SIZE~0 |v_ULTIMATE.start_main_~row~0#1_267|) (not (= (+ (* ~ARR_SIZE~0 ~ARR_SIZE~0 ~ARR_SIZE~0) ~ARR_SIZE~0) (+ (* 2 |v_ULTIMATE.start_main_~sum~0#1_168|) (* 2 (* ~ARR_SIZE~0 ~ARR_SIZE~0))))) (<= 1 ~ARR_SIZE~0)))' at error location [2024-11-14 02:52:43,151 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 02:52:43,151 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 02:52:43,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2024-11-14 02:52:43,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365389878] [2024-11-14 02:52:43,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 02:52:43,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 02:52:43,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 02:52:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 02:52:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2024-11-14 02:52:43,153 INFO L87 Difference]: Start difference. First operand 112 states and 131 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:43,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 02:52:43,522 INFO L93 Difference]: Finished difference Result 160 states and 178 transitions. [2024-11-14 02:52:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 02:52:43,523 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2024-11-14 02:52:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 02:52:43,524 INFO L225 Difference]: With dead ends: 160 [2024-11-14 02:52:43,524 INFO L226 Difference]: Without dead ends: 104 [2024-11-14 02:52:43,525 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 109 SyntacticMatches, 8 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2024-11-14 02:52:43,525 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 02:52:43,525 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 15 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 02:52:43,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2024-11-14 02:52:43,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2024-11-14 02:52:43,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.12) internal successors, (112), 100 states have internal predecessors, (112), 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 02:52:43,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 112 transitions. [2024-11-14 02:52:43,595 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 112 transitions. Word has length 43 [2024-11-14 02:52:43,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 02:52:43,595 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 112 transitions. [2024-11-14 02:52:43,596 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 02:52:43,596 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 112 transitions. [2024-11-14 02:52:43,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-14 02:52:43,596 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 02:52:43,596 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2024-11-14 02:52:43,609 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 02:52:43,797 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 02:52:43,797 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 02:52:43,797 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 02:52:43,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1454166267, now seen corresponding path program 13 times [2024-11-14 02:52:43,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 02:52:43,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434384247] [2024-11-14 02:52:43,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 02:52:43,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 02:52:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-14 02:52:43,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [62887258] [2024-11-14 02:52:43,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 02:52:43,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 02:52:43,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 02:52:43,985 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 02:52:43,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7b2eeec-d6da-409b-94a2-647deb50e368/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 02:52:53,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 02:52:53,978 WARN L253 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 211 conjuncts are in the unsatisfiable core [2024-11-14 02:52:53,990 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 02:52:54,055 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 02:52:54,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-11-14 02:52:54,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:54,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2024-11-14 02:52:54,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:54,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2024-11-14 02:52:54,490 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:54,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 48 [2024-11-14 02:52:54,583 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:54,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 15 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 47 treesize of output 58 [2024-11-14 02:52:54,693 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:54,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 21 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 54 treesize of output 68 [2024-11-14 02:52:54,814 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:54,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 28 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 61 treesize of output 78 [2024-11-14 02:52:55,210 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:55,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 36 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 68 treesize of output 88 [2024-11-14 02:52:55,365 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:55,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 45 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 75 treesize of output 98 [2024-11-14 02:52:55,555 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:55,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 10 select indices, 10 select index equivalence classes, 55 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 82 treesize of output 108 [2024-11-14 02:52:55,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:55,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 11 select indices, 11 select index equivalence classes, 66 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 89 treesize of output 118 [2024-11-14 02:52:56,381 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:56,381 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 12 select indices, 12 select index equivalence classes, 78 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 96 treesize of output 128 [2024-11-14 02:52:56,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:56,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 13 select indices, 13 select index equivalence classes, 91 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 103 treesize of output 138 [2024-11-14 02:52:56,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:56,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 14 select indices, 14 select index equivalence classes, 105 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 110 treesize of output 148 [2024-11-14 02:52:57,167 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 02:52:57,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 15 select indices, 15 select index equivalence classes, 120 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 117 treesize of output 158 [2024-11-14 02:53:04,788 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 02:53:04,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 02:53:18,195 INFO L349 Elim1Store]: treesize reduction 186, result has 69.4 percent of original size [2024-11-14 02:53:18,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 159 treesize of output 485