./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/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_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-invgen/fragtest_simple.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/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_ff4ceb75-82c6-4c25-b08c-debce30e87ee/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 be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 05:11:57,248 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 05:11:57,321 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 05:11:57,327 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 05:11:57,327 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 05:11:57,368 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 05:11:57,370 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 05:11:57,370 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 05:11:57,371 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 05:11:57,371 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 05:11:57,372 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 05:11:57,372 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 05:11:57,373 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 05:11:57,373 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 05:11:57,374 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 05:11:57,374 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 05:11:57,375 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 05:11:57,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 05:11:57,375 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 05:11:57,375 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 05:11:57,376 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 05:11:57,377 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 05:11:57,377 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 05:11:57,377 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 05:11:57,378 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 05:11:57,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:11:57,378 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 05:11:57,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 05:11:57,378 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 05:11:57,378 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 05:11:57,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 05:11:57,379 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 05:11:57,379 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 05:11:57,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 05:11:57,379 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_ff4ceb75-82c6-4c25-b08c-debce30e87ee/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 -> be3b53cc5f9badbf5402cafcfa5766831674eb009261bc7c1bcbe9580aece38e [2024-11-14 05:11:57,791 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 05:11:57,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 05:11:57,808 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 05:11:57,811 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 05:11:57,812 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 05:11:57,814 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loop-invgen/fragtest_simple.i Unable to find full path for "g++" [2024-11-14 05:12:00,025 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 05:12:00,328 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 05:12:00,343 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/sv-benchmarks/c/loop-invgen/fragtest_simple.i [2024-11-14 05:12:00,352 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/data/ab72a495c/ef3fbaa7df774876bb2eca8bdc7dd154/FLAG2fb414bd7 [2024-11-14 05:12:00,372 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/data/ab72a495c/ef3fbaa7df774876bb2eca8bdc7dd154 [2024-11-14 05:12:00,375 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 05:12:00,377 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 05:12:00,380 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 05:12:00,381 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 05:12:00,386 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 05:12:00,387 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,388 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b37e24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00, skipping insertion in model container [2024-11-14 05:12:00,391 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,411 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 05:12:00,596 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_ff4ceb75-82c6-4c25-b08c-debce30e87ee/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2024-11-14 05:12:00,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:12:00,630 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 05:12:00,644 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_ff4ceb75-82c6-4c25-b08c-debce30e87ee/sv-benchmarks/c/loop-invgen/fragtest_simple.i[893,906] [2024-11-14 05:12:00,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 05:12:00,664 INFO L204 MainTranslator]: Completed translation [2024-11-14 05:12:00,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00 WrapperNode [2024-11-14 05:12:00,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 05:12:00,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 05:12:00,666 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 05:12:00,666 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 05:12:00,673 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,693 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2024-11-14 05:12:00,693 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 05:12:00,694 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 05:12:00,694 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 05:12:00,694 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 05:12:00,700 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,700 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,701 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,705 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 05:12:00,713 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 05:12:00,713 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 05:12:00,714 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 05:12:00,715 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (1/1) ... [2024-11-14 05:12:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 05:12:00,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:00,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 05:12:00,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 05:12:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 05:12:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 05:12:00,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 05:12:00,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 05:12:00,874 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 05:12:00,876 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 05:12:01,033 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-14 05:12:01,034 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 05:12:01,069 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 05:12:01,070 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-14 05:12:01,070 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:12:01 BoogieIcfgContainer [2024-11-14 05:12:01,070 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 05:12:01,073 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 05:12:01,073 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 05:12:01,080 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 05:12:01,080 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 05:12:00" (1/3) ... [2024-11-14 05:12:01,081 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204a6313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:12:01, skipping insertion in model container [2024-11-14 05:12:01,082 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 05:12:00" (2/3) ... [2024-11-14 05:12:01,083 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@204a6313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 05:12:01, skipping insertion in model container [2024-11-14 05:12:01,084 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 05:12:01" (3/3) ... [2024-11-14 05:12:01,086 INFO L112 eAbstractionObserver]: Analyzing ICFG fragtest_simple.i [2024-11-14 05:12:01,106 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 05:12:01,109 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG fragtest_simple.i that has 1 procedures, 15 locations, 1 initial locations, 3 loop locations, and 1 error locations. [2024-11-14 05:12:01,190 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 05:12:01,208 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;@509a5248, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 05:12:01,208 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 05:12:01,215 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:01,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 05:12:01,224 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:01,225 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:01,226 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:01,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:01,235 INFO L85 PathProgramCache]: Analyzing trace with hash -287355954, now seen corresponding path program 1 times [2024-11-14 05:12:01,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:01,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169060233] [2024-11-14 05:12:01,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:01,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:01,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:01,394 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 05:12:01,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:01,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169060233] [2024-11-14 05:12:01,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169060233] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:01,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:12:01,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 05:12:01,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243008111] [2024-11-14 05:12:01,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:01,410 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-14 05:12:01,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:01,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-14 05:12:01,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:12:01,439 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 05:12:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:01,483 INFO L93 Difference]: Finished difference Result 27 states and 37 transitions. [2024-11-14 05:12:01,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-14 05:12:01,490 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 05:12:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:01,502 INFO L225 Difference]: With dead ends: 27 [2024-11-14 05:12:01,502 INFO L226 Difference]: Without dead ends: 13 [2024-11-14 05:12:01,508 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-14 05:12:01,514 INFO L432 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:01,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:12:01,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2024-11-14 05:12:01,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2024-11-14 05:12:01,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 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 05:12:01,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2024-11-14 05:12:01,565 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2024-11-14 05:12:01,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:01,565 INFO L471 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2024-11-14 05:12:01,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 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 05:12:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2024-11-14 05:12:01,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 05:12:01,566 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:01,566 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:01,570 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 05:12:01,571 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:01,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:01,571 INFO L85 PathProgramCache]: Analyzing trace with hash 2093005903, now seen corresponding path program 1 times [2024-11-14 05:12:01,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:01,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018135204] [2024-11-14 05:12:01,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:01,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:01,860 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 05:12:01,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018135204] [2024-11-14 05:12:01,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018135204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:01,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:12:01,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-14 05:12:01,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301229872] [2024-11-14 05:12:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:01,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 05:12:01,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:01,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 05:12:01,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-14 05:12:01,864 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:01,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:01,928 INFO L93 Difference]: Finished difference Result 18 states and 20 transitions. [2024-11-14 05:12:01,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 05:12:01,929 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 05:12:01,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:01,930 INFO L225 Difference]: With dead ends: 18 [2024-11-14 05:12:01,931 INFO L226 Difference]: Without dead ends: 16 [2024-11-14 05:12:01,931 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:12:01,932 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 3 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:01,934 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 21 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 05:12:01,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-11-14 05:12:01,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2024-11-14 05:12:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 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 05:12:01,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-11-14 05:12:01,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2024-11-14 05:12:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:01,940 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-11-14 05:12:01,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-14 05:12:01,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-11-14 05:12:01,940 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:01,941 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:01,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-14 05:12:01,941 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:01,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash -2091661886, now seen corresponding path program 1 times [2024-11-14 05:12:01,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:01,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417166784] [2024-11-14 05:12:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:01,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:01,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:02,217 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:02,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417166784] [2024-11-14 05:12:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417166784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 05:12:02,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 05:12:02,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-14 05:12:02,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516375296] [2024-11-14 05:12:02,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 05:12:02,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-14 05:12:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:02,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-14 05:12:02,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-14 05:12:02,219 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 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 05:12:02,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:02,314 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2024-11-14 05:12:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-14 05:12:02,317 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2024-11-14 05:12:02,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:02,317 INFO L225 Difference]: With dead ends: 31 [2024-11-14 05:12:02,317 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 05:12:02,318 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-14 05:12:02,319 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 5 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:02,319 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:02,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 05:12:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2024-11-14 05:12:02,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:02,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-11-14 05:12:02,331 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2024-11-14 05:12:02,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:02,331 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-11-14 05:12:02,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 05:12:02,331 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-11-14 05:12:02,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 05:12:02,332 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:02,332 INFO L215 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:02,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-14 05:12:02,332 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:02,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1544391129, now seen corresponding path program 1 times [2024-11-14 05:12:02,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:02,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177351819] [2024-11-14 05:12:02,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:02,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:02,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:02,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177351819] [2024-11-14 05:12:02,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177351819] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:02,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037113430] [2024-11-14 05:12:02,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:02,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:02,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:02,600 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:02,602 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 05:12:02,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:02,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 05:12:02,695 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:02,850 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:02,850 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:02,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:02,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037113430] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:02,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87820971] [2024-11-14 05:12:03,018 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:03,018 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:03,022 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:03,028 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:03,028 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:03,939 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:04,449 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '287#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:04,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:04,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:04,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2024-11-14 05:12:04,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564596518] [2024-11-14 05:12:04,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:04,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-14 05:12:04,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:04,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-14 05:12:04,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2024-11-14 05:12:04,455 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:04,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:04,742 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2024-11-14 05:12:04,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-14 05:12:04,743 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 05:12:04,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:04,744 INFO L225 Difference]: With dead ends: 41 [2024-11-14 05:12:04,744 INFO L226 Difference]: Without dead ends: 30 [2024-11-14 05:12:04,745 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:12:04,746 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 17 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:04,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 42 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-11-14 05:12:04,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 23. [2024-11-14 05:12:04,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 0 states have call successors, (0), 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 05:12:04,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2024-11-14 05:12:04,752 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2024-11-14 05:12:04,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:04,752 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2024-11-14 05:12:04,753 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:04,753 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2024-11-14 05:12:04,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 05:12:04,754 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:04,754 INFO L215 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:04,778 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 05:12:04,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:04,955 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:04,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:04,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1097538497, now seen corresponding path program 2 times [2024-11-14 05:12:04,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:04,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490922796] [2024-11-14 05:12:04,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:04,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:05,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:05,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490922796] [2024-11-14 05:12:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490922796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428254156] [2024-11-14 05:12:05,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:05,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:05,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:05,256 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:05,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 05:12:05,320 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 05:12:05,320 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:05,321 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-14 05:12:05,323 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:05,489 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:05,490 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:05,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428254156] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:05,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2063217355] [2024-11-14 05:12:05,633 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:05,633 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:05,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:05,633 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:05,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:06,228 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:06,764 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '538#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:06,765 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:06,765 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:06,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 16 [2024-11-14 05:12:06,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933400243] [2024-11-14 05:12:06,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:06,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:12:06,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:06,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:12:06,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:12:06,770 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:07,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:07,193 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2024-11-14 05:12:07,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:12:07,194 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2024-11-14 05:12:07,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:07,197 INFO L225 Difference]: With dead ends: 54 [2024-11-14 05:12:07,198 INFO L226 Difference]: Without dead ends: 39 [2024-11-14 05:12:07,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=205, Invalid=1201, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:12:07,202 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 20 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:07,202 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:07,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-11-14 05:12:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2024-11-14 05:12:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 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 05:12:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2024-11-14 05:12:07,213 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2024-11-14 05:12:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:07,213 INFO L471 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2024-11-14 05:12:07,213 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:07,214 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2024-11-14 05:12:07,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-11-14 05:12:07,214 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:07,215 INFO L215 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:07,229 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-14 05:12:07,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:07,415 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:07,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:07,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1069201047, now seen corresponding path program 3 times [2024-11-14 05:12:07,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:07,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262002984] [2024-11-14 05:12:07,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:07,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:07,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:07,668 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:07,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262002984] [2024-11-14 05:12:07,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262002984] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:07,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782967735] [2024-11-14 05:12:07,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:07,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:07,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:07,672 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:07,674 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 05:12:07,755 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:07,755 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:07,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-14 05:12:07,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:07,972 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:07,972 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:08,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782967735] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:08,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1766885339] [2024-11-14 05:12:08,097 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:08,098 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:08,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:08,098 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:08,098 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:08,494 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:08,896 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '861#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:08,896 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:08,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:08,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2024-11-14 05:12:08,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993694526] [2024-11-14 05:12:08,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:08,898 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-14 05:12:08,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:08,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-14 05:12:08,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:12:08,900 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:09,052 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2024-11-14 05:12:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 05:12:09,053 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2024-11-14 05:12:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:09,054 INFO L225 Difference]: With dead ends: 62 [2024-11-14 05:12:09,054 INFO L226 Difference]: Without dead ends: 43 [2024-11-14 05:12:09,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:12:09,055 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:09,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 62 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:09,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-11-14 05:12:09,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 31. [2024-11-14 05:12:09,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1) internal successors, (33), 30 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 05:12:09,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-14 05:12:09,066 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 28 [2024-11-14 05:12:09,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:09,066 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-14 05:12:09,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:09,067 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-14 05:12:09,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-14 05:12:09,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:09,068 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:09,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:09,272 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 05:12:09,273 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:09,273 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:09,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1081496124, now seen corresponding path program 4 times [2024-11-14 05:12:09,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:09,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360648726] [2024-11-14 05:12:09,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:09,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:09,512 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:09,512 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360648726] [2024-11-14 05:12:09,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360648726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:09,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545143051] [2024-11-14 05:12:09,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:09,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:09,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:09,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:09,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 05:12:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:09,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 05:12:09,584 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:09,672 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:09,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545143051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:09,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [21207144] [2024-11-14 05:12:09,786 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:09,786 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:09,786 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:09,786 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:09,786 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:10,105 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:10,443 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1184#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:10,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:10,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:10,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-11-14 05:12:10,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286270354] [2024-11-14 05:12:10,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:10,444 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-14 05:12:10,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-14 05:12:10,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-11-14 05:12:10,446 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 05:12:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:10,603 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2024-11-14 05:12:10,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-14 05:12:10,608 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 30 [2024-11-14 05:12:10,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:10,609 INFO L225 Difference]: With dead ends: 48 [2024-11-14 05:12:10,609 INFO L226 Difference]: Without dead ends: 46 [2024-11-14 05:12:10,609 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 71 SyntacticMatches, 9 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=471, Unknown=0, NotChecked=0, Total=600 [2024-11-14 05:12:10,610 INFO L432 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:10,610 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:10,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-11-14 05:12:10,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2024-11-14 05:12:10,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:10,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-11-14 05:12:10,623 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 30 [2024-11-14 05:12:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:10,623 INFO L471 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-11-14 05:12:10,624 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 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 05:12:10,624 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-11-14 05:12:10,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-11-14 05:12:10,624 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:10,624 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:10,649 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:10,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:10,831 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:10,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash -465946974, now seen corresponding path program 5 times [2024-11-14 05:12:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:10,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416719214] [2024-11-14 05:12:10,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:10,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 38 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:11,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416719214] [2024-11-14 05:12:11,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416719214] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:11,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620532254] [2024-11-14 05:12:11,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:11,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:11,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:11,119 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:11,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 05:12:11,198 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 05:12:11,198 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:11,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-14 05:12:11,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:11,435 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 50 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:11,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620532254] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:11,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278272023] [2024-11-14 05:12:11,609 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:11,609 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:11,610 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:11,610 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:11,610 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:11,897 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:12,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1560#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:12,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:12,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:12,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2024-11-14 05:12:12,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618736011] [2024-11-14 05:12:12,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:12,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 05:12:12,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 05:12:12,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2024-11-14 05:12:12,294 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 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 05:12:12,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:12,623 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2024-11-14 05:12:12,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-14 05:12:12,624 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 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 38 [2024-11-14 05:12:12,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:12,625 INFO L225 Difference]: With dead ends: 107 [2024-11-14 05:12:12,625 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 05:12:12,626 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=331, Invalid=1475, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 05:12:12,626 INFO L432 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:12,627 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 124 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:12,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 05:12:12,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 43. [2024-11-14 05:12:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:12,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2024-11-14 05:12:12,633 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2024-11-14 05:12:12,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:12,633 INFO L471 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2024-11-14 05:12:12,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.260869565217391) internal successors, (75), 23 states have internal predecessors, (75), 0 states have call successors, (0), 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 05:12:12,633 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2024-11-14 05:12:12,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-14 05:12:12,634 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:12,634 INFO L215 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:12,656 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 05:12:12,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:12,838 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:12,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1233808340, now seen corresponding path program 6 times [2024-11-14 05:12:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951972346] [2024-11-14 05:12:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:12,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:13,140 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 30 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:13,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951972346] [2024-11-14 05:12:13,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951972346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:13,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939912422] [2024-11-14 05:12:13,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:13,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:13,141 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:13,143 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:13,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 05:12:13,235 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:13,235 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:13,237 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-14 05:12:13,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:13,347 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 42 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:13,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939912422] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:13,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [894736194] [2024-11-14 05:12:13,519 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:13,520 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:13,520 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:13,520 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:13,520 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:13,791 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:14,111 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2045#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:14,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:14,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:14,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-11-14 05:12:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611624449] [2024-11-14 05:12:14,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:14,112 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 05:12:14,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:14,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 05:12:14,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-11-14 05:12:14,114 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 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 05:12:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:14,281 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2024-11-14 05:12:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:12:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 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 42 [2024-11-14 05:12:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:14,283 INFO L225 Difference]: With dead ends: 60 [2024-11-14 05:12:14,283 INFO L226 Difference]: Without dead ends: 58 [2024-11-14 05:12:14,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 105 SyntacticMatches, 13 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2024-11-14 05:12:14,284 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:14,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:14,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-14 05:12:14,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2024-11-14 05:12:14,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 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 05:12:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2024-11-14 05:12:14,292 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 42 [2024-11-14 05:12:14,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:14,292 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2024-11-14 05:12:14,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 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 05:12:14,292 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2024-11-14 05:12:14,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 05:12:14,293 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:14,294 INFO L215 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:14,317 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 05:12:14,498 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 05:12:14,498 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:14,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:14,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1267763346, now seen corresponding path program 7 times [2024-11-14 05:12:14,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:14,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119145429] [2024-11-14 05:12:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:14,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:14,914 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 80 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:14,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119145429] [2024-11-14 05:12:14,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119145429] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:14,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237304258] [2024-11-14 05:12:14,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:14,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:14,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:14,917 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:14,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 05:12:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:15,002 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 05:12:15,004 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:15,303 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 96 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:15,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237304258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:15,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1486274653] [2024-11-14 05:12:15,523 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:15,523 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:15,524 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:15,524 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:15,527 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:15,799 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:16,164 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2532#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:16,164 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:16,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:16,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2024-11-14 05:12:16,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226293944] [2024-11-14 05:12:16,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:16,165 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-14 05:12:16,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:16,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-14 05:12:16,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=992, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 05:12:16,167 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 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 05:12:16,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:16,439 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2024-11-14 05:12:16,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 05:12:16,440 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 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 50 [2024-11-14 05:12:16,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:16,442 INFO L225 Difference]: With dead ends: 107 [2024-11-14 05:12:16,442 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 05:12:16,447 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 13 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=312, Invalid=1410, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:12:16,448 INFO L432 NwaCegarLoop]: 16 mSDtfsCounter, 42 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:16,448 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 122 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:16,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 05:12:16,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2024-11-14 05:12:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 0 states have call successors, (0), 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 05:12:16,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2024-11-14 05:12:16,459 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 50 [2024-11-14 05:12:16,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:16,459 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2024-11-14 05:12:16,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 26 states have internal predecessors, (86), 0 states have call successors, (0), 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 05:12:16,460 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2024-11-14 05:12:16,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 05:12:16,461 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:16,461 INFO L215 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:16,484 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 05:12:16,665 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-14 05:12:16,666 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:16,666 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:16,666 INFO L85 PathProgramCache]: Analyzing trace with hash 399354487, now seen corresponding path program 8 times [2024-11-14 05:12:16,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:16,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14071985] [2024-11-14 05:12:16,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:16,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 80 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:17,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14071985] [2024-11-14 05:12:17,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14071985] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:17,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058204563] [2024-11-14 05:12:17,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:17,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:17,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:17,111 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:17,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 05:12:17,213 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-11-14 05:12:17,214 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:17,217 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 05:12:17,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:17,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:17,728 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 98 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:17,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058204563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:17,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [723403736] [2024-11-14 05:12:17,730 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:17,730 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:17,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:17,731 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:17,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:18,059 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:18,448 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3098#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:18,448 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:18,448 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:18,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 28 [2024-11-14 05:12:18,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298875656] [2024-11-14 05:12:18,449 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:18,449 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-14 05:12:18,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:18,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-14 05:12:18,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 05:12:18,450 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 05:12:18,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:18,733 INFO L93 Difference]: Finished difference Result 114 states and 125 transitions. [2024-11-14 05:12:18,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 05:12:18,733 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 52 [2024-11-14 05:12:18,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:18,734 INFO L225 Difference]: With dead ends: 114 [2024-11-14 05:12:18,735 INFO L226 Difference]: Without dead ends: 79 [2024-11-14 05:12:18,735 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 122 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 05:12:18,736 INFO L432 NwaCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:18,736 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 162 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:18,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-11-14 05:12:18,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2024-11-14 05:12:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 54 states have internal predecessors, (57), 0 states have call successors, (0), 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 05:12:18,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2024-11-14 05:12:18,744 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 52 [2024-11-14 05:12:18,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:18,744 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2024-11-14 05:12:18,744 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 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 05:12:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2024-11-14 05:12:18,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-11-14 05:12:18,745 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:18,746 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:18,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 05:12:18,953 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-14 05:12:18,953 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:18,954 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:18,954 INFO L85 PathProgramCache]: Analyzing trace with hash -917903588, now seen corresponding path program 9 times [2024-11-14 05:12:18,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:18,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662651911] [2024-11-14 05:12:18,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:18,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:18,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:19,297 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 56 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:19,298 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:19,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662651911] [2024-11-14 05:12:19,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662651911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:19,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849375113] [2024-11-14 05:12:19,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:19,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:19,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:19,301 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:19,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 05:12:19,398 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:19,399 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:19,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:12:19,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:19,507 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:19,712 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 72 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:19,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849375113] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:19,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [651293509] [2024-11-14 05:12:19,714 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:19,715 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:19,716 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:19,716 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:19,716 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:19,966 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:20,294 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3677#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:20,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:20,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:20,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2024-11-14 05:12:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925253858] [2024-11-14 05:12:20,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:20,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 05:12:20,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:20,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 05:12:20,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-11-14 05:12:20,297 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 05:12:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:20,497 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2024-11-14 05:12:20,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 05:12:20,498 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 54 [2024-11-14 05:12:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:20,499 INFO L225 Difference]: With dead ends: 72 [2024-11-14 05:12:20,499 INFO L226 Difference]: Without dead ends: 70 [2024-11-14 05:12:20,500 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 140 SyntacticMatches, 16 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=243, Invalid=813, Unknown=0, NotChecked=0, Total=1056 [2024-11-14 05:12:20,501 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 11 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:20,502 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 82 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-11-14 05:12:20,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2024-11-14 05:12:20,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 0 states have call successors, (0), 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 05:12:20,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2024-11-14 05:12:20,517 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 54 [2024-11-14 05:12:20,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:20,518 INFO L471 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2024-11-14 05:12:20,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 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 05:12:20,518 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2024-11-14 05:12:20,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-14 05:12:20,519 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:20,519 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:20,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 05:12:20,719 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 05:12:20,720 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:20,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash 907733890, now seen corresponding path program 10 times [2024-11-14 05:12:20,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:20,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944379046] [2024-11-14 05:12:20,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:20,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:21,207 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 138 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:21,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:21,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944379046] [2024-11-14 05:12:21,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944379046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:21,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551014121] [2024-11-14 05:12:21,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:21,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:21,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:21,211 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:21,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 05:12:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:21,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 05:12:21,313 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 160 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:21,736 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 160 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:22,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551014121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:22,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1222263429] [2024-11-14 05:12:22,034 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:22,034 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:22,034 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:22,035 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:22,035 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:22,266 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:22,740 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4278#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:22,740 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:22,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:22,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 32 [2024-11-14 05:12:22,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123352393] [2024-11-14 05:12:22,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:22,741 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-14 05:12:22,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:22,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-14 05:12:22,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=1360, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 05:12:22,743 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 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 05:12:23,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:23,097 INFO L93 Difference]: Finished difference Result 133 states and 145 transitions. [2024-11-14 05:12:23,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 05:12:23,098 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 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 62 [2024-11-14 05:12:23,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:23,099 INFO L225 Difference]: With dead ends: 133 [2024-11-14 05:12:23,099 INFO L226 Difference]: Without dead ends: 92 [2024-11-14 05:12:23,100 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 149 SyntacticMatches, 17 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=462, Invalid=1988, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:12:23,101 INFO L432 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:23,101 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 172 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:23,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-11-14 05:12:23,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2024-11-14 05:12:23,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.046875) internal successors, (67), 64 states have internal predecessors, (67), 0 states have call successors, (0), 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 05:12:23,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2024-11-14 05:12:23,109 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 62 [2024-11-14 05:12:23,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:23,109 INFO L471 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2024-11-14 05:12:23,109 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.3125) internal successors, (106), 32 states have internal predecessors, (106), 0 states have call successors, (0), 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 05:12:23,109 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2024-11-14 05:12:23,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-11-14 05:12:23,110 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:23,110 INFO L215 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:23,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:23,311 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 05:12:23,311 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:23,311 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash -840737305, now seen corresponding path program 11 times [2024-11-14 05:12:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:23,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901014861] [2024-11-14 05:12:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:23,810 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 138 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:23,811 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901014861] [2024-11-14 05:12:23,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901014861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:23,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946475491] [2024-11-14 05:12:23,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:23,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:23,814 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:23,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 05:12:23,931 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 05:12:23,931 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:23,933 INFO L255 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 05:12:23,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 162 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:24,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 162 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:24,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946475491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:24,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1977599914] [2024-11-14 05:12:24,779 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:24,779 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:24,780 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:24,780 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:24,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:25,028 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:25,440 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4976#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:25,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:25,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:25,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 34 [2024-11-14 05:12:25,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538398198] [2024-11-14 05:12:25,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:25,441 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-11-14 05:12:25,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:25,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-11-14 05:12:25,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1491, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 05:12:25,443 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 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 05:12:25,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:25,767 INFO L93 Difference]: Finished difference Result 140 states and 153 transitions. [2024-11-14 05:12:25,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-14 05:12:25,767 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 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 64 [2024-11-14 05:12:25,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:25,767 INFO L225 Difference]: With dead ends: 140 [2024-11-14 05:12:25,768 INFO L226 Difference]: Without dead ends: 97 [2024-11-14 05:12:25,768 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 152 SyntacticMatches, 19 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=537, Invalid=2219, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:12:25,769 INFO L432 NwaCegarLoop]: 22 mSDtfsCounter, 63 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:25,769 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 188 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:25,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-11-14 05:12:25,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2024-11-14 05:12:25,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 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 05:12:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2024-11-14 05:12:25,776 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 64 [2024-11-14 05:12:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:25,777 INFO L471 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2024-11-14 05:12:25,777 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.176470588235294) internal successors, (108), 34 states have internal predecessors, (108), 0 states have call successors, (0), 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 05:12:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2024-11-14 05:12:25,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-14 05:12:25,781 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:25,781 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:25,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 05:12:25,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 05:12:25,982 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:25,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:25,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1789342964, now seen corresponding path program 12 times [2024-11-14 05:12:25,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:25,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459658179] [2024-11-14 05:12:25,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:25,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:26,353 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 90 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:26,354 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459658179] [2024-11-14 05:12:26,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459658179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:26,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68433617] [2024-11-14 05:12:26,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:26,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:26,354 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:26,357 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:26,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 05:12:26,467 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:26,467 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:26,469 INFO L255 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-14 05:12:26,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:26,602 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:26,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 110 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:26,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68433617] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:26,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [908969055] [2024-11-14 05:12:26,825 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:26,825 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:26,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:26,826 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:26,826 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:27,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:27,382 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5683#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:27,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:27,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:27,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2024-11-14 05:12:27,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609796031] [2024-11-14 05:12:27,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:27,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-14 05:12:27,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:27,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-14 05:12:27,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2024-11-14 05:12:27,383 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 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 05:12:27,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:27,567 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2024-11-14 05:12:27,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:12:27,568 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 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 66 [2024-11-14 05:12:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:27,568 INFO L225 Difference]: With dead ends: 84 [2024-11-14 05:12:27,569 INFO L226 Difference]: Without dead ends: 82 [2024-11-14 05:12:27,569 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 173 SyntacticMatches, 21 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2024-11-14 05:12:27,570 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 12 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:27,570 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 110 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-11-14 05:12:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2024-11-14 05:12:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 0 states have call successors, (0), 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 05:12:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2024-11-14 05:12:27,577 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 66 [2024-11-14 05:12:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:27,578 INFO L471 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2024-11-14 05:12:27,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 16 states have internal predecessors, (87), 0 states have call successors, (0), 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 05:12:27,578 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2024-11-14 05:12:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-11-14 05:12:27,579 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:27,579 INFO L215 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:27,602 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-14 05:12:27,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 05:12:27,783 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:27,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:27,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1027678350, now seen corresponding path program 13 times [2024-11-14 05:12:27,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:27,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141269667] [2024-11-14 05:12:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:27,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 212 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:28,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:28,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141269667] [2024-11-14 05:12:28,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141269667] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:28,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274406616] [2024-11-14 05:12:28,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:28,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:28,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:28,368 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:28,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 05:12:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:28,496 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 05:12:28,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:28,999 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 240 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:28,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:29,396 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 240 proven. 110 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:29,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274406616] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:29,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1014325201] [2024-11-14 05:12:29,398 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:29,398 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:29,398 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:29,398 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:29,398 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:29,604 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:30,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6398#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:30,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:30,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:30,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 38 [2024-11-14 05:12:30,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739951203] [2024-11-14 05:12:30,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:30,069 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 05:12:30,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:30,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 05:12:30,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2024-11-14 05:12:30,070 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 38 states have internal predecessors, (126), 0 states have call successors, (0), 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 05:12:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:30,511 INFO L93 Difference]: Finished difference Result 159 states and 173 transitions. [2024-11-14 05:12:30,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 05:12:30,511 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 38 states have internal predecessors, (126), 0 states have call successors, (0), 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 74 [2024-11-14 05:12:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:30,513 INFO L225 Difference]: With dead ends: 159 [2024-11-14 05:12:30,513 INFO L226 Difference]: Without dead ends: 110 [2024-11-14 05:12:30,514 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 179 SyntacticMatches, 21 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1310 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=644, Invalid=2662, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:12:30,515 INFO L432 NwaCegarLoop]: 24 mSDtfsCounter, 91 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:30,515 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 217 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:30,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-14 05:12:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2024-11-14 05:12:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 0 states have call successors, (0), 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 05:12:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2024-11-14 05:12:30,529 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 74 [2024-11-14 05:12:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:30,529 INFO L471 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2024-11-14 05:12:30,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.3157894736842106) internal successors, (126), 38 states have internal predecessors, (126), 0 states have call successors, (0), 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 05:12:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2024-11-14 05:12:30,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2024-11-14 05:12:30,531 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:30,531 INFO L215 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:30,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 05:12:30,734 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:30,734 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:30,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1629348439, now seen corresponding path program 14 times [2024-11-14 05:12:30,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:30,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61427230] [2024-11-14 05:12:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:30,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:30,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 212 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:31,409 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61427230] [2024-11-14 05:12:31,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61427230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:31,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67006933] [2024-11-14 05:12:31,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:31,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:31,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:31,412 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:31,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 05:12:31,548 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-11-14 05:12:31,548 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:31,550 INFO L255 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 05:12:31,553 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 242 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:32,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:32,461 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 242 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:32,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67006933] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:32,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827424841] [2024-11-14 05:12:32,463 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:32,463 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:32,463 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:32,463 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:32,463 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:32,664 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:33,208 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7228#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:33,209 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:33,209 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:33,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2024-11-14 05:12:33,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447818440] [2024-11-14 05:12:33,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:33,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-14 05:12:33,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:33,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-14 05:12:33,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1933, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:12:33,212 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 05:12:33,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:33,612 INFO L93 Difference]: Finished difference Result 166 states and 181 transitions. [2024-11-14 05:12:33,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-14 05:12:33,612 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 76 [2024-11-14 05:12:33,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:33,612 INFO L225 Difference]: With dead ends: 166 [2024-11-14 05:12:33,613 INFO L226 Difference]: Without dead ends: 115 [2024-11-14 05:12:33,613 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 182 SyntacticMatches, 23 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=733, Invalid=2927, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 05:12:33,614 INFO L432 NwaCegarLoop]: 26 mSDtfsCounter, 87 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:33,616 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 224 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:33,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-11-14 05:12:33,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 79. [2024-11-14 05:12:33,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 78 states have internal predecessors, (81), 0 states have call successors, (0), 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 05:12:33,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2024-11-14 05:12:33,627 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 76 [2024-11-14 05:12:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:33,628 INFO L471 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2024-11-14 05:12:33,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.2) internal successors, (128), 40 states have internal predecessors, (128), 0 states have call successors, (0), 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 05:12:33,629 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2024-11-14 05:12:33,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-11-14 05:12:33,631 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:33,632 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:33,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:33,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 05:12:33,832 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:33,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:33,833 INFO L85 PathProgramCache]: Analyzing trace with hash -473448452, now seen corresponding path program 15 times [2024-11-14 05:12:33,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:33,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316833304] [2024-11-14 05:12:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:33,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:33,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:34,311 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 132 proven. 266 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:34,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316833304] [2024-11-14 05:12:34,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316833304] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:34,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125242532] [2024-11-14 05:12:34,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:34,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:34,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:34,316 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:34,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 05:12:34,454 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:34,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:34,456 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 05:12:34,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:34,618 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 156 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:34,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125242532] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:34,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [938394929] [2024-11-14 05:12:34,948 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:34,949 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:34,949 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:34,949 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:34,949 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:35,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:35,390 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8063#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:35,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:35,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:35,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2024-11-14 05:12:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416273639] [2024-11-14 05:12:35,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:35,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-14 05:12:35,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:35,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-14 05:12:35,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=585, Unknown=0, NotChecked=0, Total=756 [2024-11-14 05:12:35,392 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 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 05:12:35,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:35,685 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2024-11-14 05:12:35,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 05:12:35,685 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 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 78 [2024-11-14 05:12:35,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:35,686 INFO L225 Difference]: With dead ends: 96 [2024-11-14 05:12:35,686 INFO L226 Difference]: Without dead ends: 94 [2024-11-14 05:12:35,687 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 208 SyntacticMatches, 24 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2024-11-14 05:12:35,688 INFO L432 NwaCegarLoop]: 21 mSDtfsCounter, 12 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:35,688 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 112 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:35,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-11-14 05:12:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 87. [2024-11-14 05:12:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 0 states have call successors, (0), 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 05:12:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2024-11-14 05:12:35,696 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 78 [2024-11-14 05:12:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:35,696 INFO L471 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2024-11-14 05:12:35,696 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.2105263157894735) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 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 05:12:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2024-11-14 05:12:35,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-11-14 05:12:35,697 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:35,697 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:35,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 05:12:35,898 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 05:12:35,898 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:35,899 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:35,899 INFO L85 PathProgramCache]: Analyzing trace with hash -48110494, now seen corresponding path program 16 times [2024-11-14 05:12:35,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:35,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575355301] [2024-11-14 05:12:35,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:35,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 302 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:36,574 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:36,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575355301] [2024-11-14 05:12:36,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575355301] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:36,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927376359] [2024-11-14 05:12:36,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:36,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:36,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:36,576 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:36,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 05:12:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:36,705 INFO L255 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 05:12:36,707 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:37,314 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:37,314 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:37,726 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 336 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:37,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927376359] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:37,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [791513079] [2024-11-14 05:12:37,731 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:37,731 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:37,731 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:37,731 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:37,731 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:37,956 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:38,414 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8892#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:38,414 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:38,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:38,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 44 [2024-11-14 05:12:38,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076314808] [2024-11-14 05:12:38,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:38,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-11-14 05:12:38,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:38,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-11-14 05:12:38,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=492, Invalid=2264, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:12:38,417 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 44 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 44 states have internal predecessors, (146), 0 states have call successors, (0), 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 05:12:38,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:38,933 INFO L93 Difference]: Finished difference Result 185 states and 201 transitions. [2024-11-14 05:12:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-11-14 05:12:38,934 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 44 states have internal predecessors, (146), 0 states have call successors, (0), 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 86 [2024-11-14 05:12:38,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:38,935 INFO L225 Difference]: With dead ends: 185 [2024-11-14 05:12:38,935 INFO L226 Difference]: Without dead ends: 128 [2024-11-14 05:12:38,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 209 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1702 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=858, Invalid=3432, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:12:38,940 INFO L432 NwaCegarLoop]: 28 mSDtfsCounter, 99 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:38,940 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 315 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:38,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-11-14 05:12:38,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 89. [2024-11-14 05:12:38,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 88 states have internal predecessors, (91), 0 states have call successors, (0), 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 05:12:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2024-11-14 05:12:38,950 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 86 [2024-11-14 05:12:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:38,950 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2024-11-14 05:12:38,950 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.3181818181818183) internal successors, (146), 44 states have internal predecessors, (146), 0 states have call successors, (0), 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 05:12:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2024-11-14 05:12:38,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-11-14 05:12:38,951 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:38,952 INFO L215 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:38,976 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 05:12:39,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:39,155 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:39,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:39,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1715648455, now seen corresponding path program 17 times [2024-11-14 05:12:39,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:39,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704847241] [2024-11-14 05:12:39,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:39,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:39,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:39,867 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 302 proven. 218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:39,867 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704847241] [2024-11-14 05:12:39,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704847241] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:39,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885814685] [2024-11-14 05:12:39,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:39,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:39,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:39,869 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:39,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 05:12:40,003 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 05:12:40,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:40,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-14 05:12:40,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:40,617 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 338 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885814685] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:41,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1052469762] [2024-11-14 05:12:41,061 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:41,061 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:41,061 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:41,061 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:41,061 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:41,214 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:41,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9854#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:41,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:41,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:41,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-11-14 05:12:41,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311132707] [2024-11-14 05:12:41,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:41,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-11-14 05:12:41,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:41,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-11-14 05:12:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 05:12:41,634 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 46 states have internal predecessors, (148), 0 states have call successors, (0), 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 05:12:42,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:42,072 INFO L93 Difference]: Finished difference Result 192 states and 209 transitions. [2024-11-14 05:12:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 05:12:42,073 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 46 states have internal predecessors, (148), 0 states have call successors, (0), 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 88 [2024-11-14 05:12:42,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:42,074 INFO L225 Difference]: With dead ends: 192 [2024-11-14 05:12:42,074 INFO L226 Difference]: Without dead ends: 133 [2024-11-14 05:12:42,076 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 212 SyntacticMatches, 27 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=961, Invalid=3731, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 05:12:42,076 INFO L432 NwaCegarLoop]: 30 mSDtfsCounter, 108 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:42,077 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 289 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-14 05:12:42,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2024-11-14 05:12:42,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 90 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:12:42,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2024-11-14 05:12:42,084 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 88 [2024-11-14 05:12:42,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:42,084 INFO L471 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2024-11-14 05:12:42,084 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.217391304347826) internal successors, (148), 46 states have internal predecessors, (148), 0 states have call successors, (0), 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 05:12:42,085 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2024-11-14 05:12:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-11-14 05:12:42,085 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:42,085 INFO L215 NwaCegarLoop]: trace histogram [15, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:42,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 05:12:42,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:42,286 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:42,286 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:42,286 INFO L85 PathProgramCache]: Analyzing trace with hash 175916524, now seen corresponding path program 18 times [2024-11-14 05:12:42,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:42,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145656552] [2024-11-14 05:12:42,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:42,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:42,805 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 182 proven. 366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:42,806 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145656552] [2024-11-14 05:12:42,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145656552] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:42,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584783061] [2024-11-14 05:12:42,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:42,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:42,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:42,808 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:42,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 05:12:42,966 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:42,966 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:42,969 INFO L255 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 05:12:42,971 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:43,146 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:43,510 INFO L134 CoverageAnalysis]: Checked inductivity of 548 backedges. 210 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584783061] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1171254890] [2024-11-14 05:12:43,512 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:43,512 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:43,512 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:43,512 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:43,512 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:43,658 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:43,969 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10817#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:43,969 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:43,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:43,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2024-11-14 05:12:43,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007828027] [2024-11-14 05:12:43,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:43,970 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-14 05:12:43,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:43,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-14 05:12:43,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2024-11-14 05:12:43,971 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 20 states have internal predecessors, (111), 0 states have call successors, (0), 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 05:12:44,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:44,243 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2024-11-14 05:12:44,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 05:12:44,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 20 states have internal predecessors, (111), 0 states have call successors, (0), 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 90 [2024-11-14 05:12:44,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:44,245 INFO L225 Difference]: With dead ends: 108 [2024-11-14 05:12:44,245 INFO L226 Difference]: Without dead ends: 106 [2024-11-14 05:12:44,245 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 242 SyntacticMatches, 28 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=504, Invalid=1476, Unknown=0, NotChecked=0, Total=1980 [2024-11-14 05:12:44,246 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 12 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:44,246 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:44,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-14 05:12:44,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2024-11-14 05:12:44,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 0 states have call successors, (0), 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 05:12:44,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2024-11-14 05:12:44,252 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 90 [2024-11-14 05:12:44,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:44,253 INFO L471 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2024-11-14 05:12:44,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.285714285714286) internal successors, (111), 20 states have internal predecessors, (111), 0 states have call successors, (0), 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 05:12:44,253 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2024-11-14 05:12:44,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-11-14 05:12:44,253 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:44,254 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:44,278 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 05:12:44,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:44,454 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:44,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:44,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1112966574, now seen corresponding path program 19 times [2024-11-14 05:12:44,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:44,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431548140] [2024-11-14 05:12:44,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:44,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:45,391 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 408 proven. 252 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:45,392 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:45,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431548140] [2024-11-14 05:12:45,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431548140] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:45,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992516607] [2024-11-14 05:12:45,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:45,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:45,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:45,395 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:45,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 05:12:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:45,562 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 05:12:45,564 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 448 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:46,390 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 448 proven. 210 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:46,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992516607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:46,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1770038208] [2024-11-14 05:12:46,882 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:46,882 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:46,882 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:46,882 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:46,882 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:47,056 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:47,664 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11760#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:47,664 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:47,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 50 [2024-11-14 05:12:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348831525] [2024-11-14 05:12:47,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:47,665 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-11-14 05:12:47,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:47,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-11-14 05:12:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=622, Invalid=2800, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 05:12:47,668 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 50 states, 50 states have (on average 3.32) internal successors, (166), 50 states have internal predecessors, (166), 0 states have call successors, (0), 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 05:12:48,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:48,228 INFO L93 Difference]: Finished difference Result 211 states and 229 transitions. [2024-11-14 05:12:48,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-14 05:12:48,229 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.32) internal successors, (166), 50 states have internal predecessors, (166), 0 states have call successors, (0), 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 98 [2024-11-14 05:12:48,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:48,230 INFO L225 Difference]: With dead ends: 211 [2024-11-14 05:12:48,230 INFO L226 Difference]: Without dead ends: 146 [2024-11-14 05:12:48,231 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 239 SyntacticMatches, 29 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1104, Invalid=4298, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 05:12:48,233 INFO L432 NwaCegarLoop]: 32 mSDtfsCounter, 125 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:48,234 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 267 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:12:48,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-11-14 05:12:48,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 101. [2024-11-14 05:12:48,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.03) internal successors, (103), 100 states have internal predecessors, (103), 0 states have call successors, (0), 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 05:12:48,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2024-11-14 05:12:48,243 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 98 [2024-11-14 05:12:48,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:48,243 INFO L471 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2024-11-14 05:12:48,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.32) internal successors, (166), 50 states have internal predecessors, (166), 0 states have call successors, (0), 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 05:12:48,244 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2024-11-14 05:12:48,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2024-11-14 05:12:48,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:48,244 INFO L215 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:48,266 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 05:12:48,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-14 05:12:48,445 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:48,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:48,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1898488265, now seen corresponding path program 20 times [2024-11-14 05:12:48,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:48,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593373778] [2024-11-14 05:12:48,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:48,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:49,418 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 408 proven. 282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:49,418 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:49,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593373778] [2024-11-14 05:12:49,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593373778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:49,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920682665] [2024-11-14 05:12:49,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:12:49,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:49,421 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:49,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 05:12:49,583 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-11-14 05:12:49,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:49,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 05:12:49,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 450 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:50,438 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 450 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:50,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920682665] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1713348064] [2024-11-14 05:12:50,975 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:50,975 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:50,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:50,976 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:50,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:51,132 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:51,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '12854#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:51,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:51,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:51,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 52 [2024-11-14 05:12:51,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988954194] [2024-11-14 05:12:51,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:51,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-11-14 05:12:51,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:51,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-11-14 05:12:51,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=2985, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 05:12:51,619 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 52 states, 52 states have (on average 3.230769230769231) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 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 05:12:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:52,239 INFO L93 Difference]: Finished difference Result 218 states and 237 transitions. [2024-11-14 05:12:52,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-14 05:12:52,240 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.230769230769231) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 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 100 [2024-11-14 05:12:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:52,241 INFO L225 Difference]: With dead ends: 218 [2024-11-14 05:12:52,241 INFO L226 Difference]: Without dead ends: 151 [2024-11-14 05:12:52,243 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 242 SyntacticMatches, 31 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2307 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1221, Invalid=4631, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 05:12:52,243 INFO L432 NwaCegarLoop]: 34 mSDtfsCounter, 101 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:52,244 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 318 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:12:52,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-14 05:12:52,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 103. [2024-11-14 05:12:52,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 0 states have call successors, (0), 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 05:12:52,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2024-11-14 05:12:52,261 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 100 [2024-11-14 05:12:52,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:52,261 INFO L471 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2024-11-14 05:12:52,261 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.230769230769231) internal successors, (168), 52 states have internal predecessors, (168), 0 states have call successors, (0), 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 05:12:52,261 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2024-11-14 05:12:52,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-11-14 05:12:52,262 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:52,262 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:52,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:52,462 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:52,462 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:52,463 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:52,463 INFO L85 PathProgramCache]: Analyzing trace with hash -870589220, now seen corresponding path program 21 times [2024-11-14 05:12:52,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:52,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173616439] [2024-11-14 05:12:52,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:52,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:53,117 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 240 proven. 482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:53,118 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173616439] [2024-11-14 05:12:53,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173616439] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:53,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163109539] [2024-11-14 05:12:53,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:12:53,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:53,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:53,121 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:53,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-14 05:12:53,283 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:12:53,283 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:12:53,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-14 05:12:53,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:53,429 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:53,843 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 272 proven. 450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:53,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163109539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:53,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1847172815] [2024-11-14 05:12:53,845 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:53,845 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:53,845 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:53,845 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:53,845 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:54,026 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:54,373 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13945#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:54,373 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:54,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:54,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2024-11-14 05:12:54,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662432658] [2024-11-14 05:12:54,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:54,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-14 05:12:54,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:54,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-14 05:12:54,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2024-11-14 05:12:54,375 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 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 05:12:54,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:54,727 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2024-11-14 05:12:54,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 05:12:54,728 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 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 102 [2024-11-14 05:12:54,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:54,729 INFO L225 Difference]: With dead ends: 120 [2024-11-14 05:12:54,729 INFO L226 Difference]: Without dead ends: 118 [2024-11-14 05:12:54,729 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 275 SyntacticMatches, 33 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1046 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=615, Invalid=1737, Unknown=0, NotChecked=0, Total=2352 [2024-11-14 05:12:54,730 INFO L432 NwaCegarLoop]: 25 mSDtfsCounter, 12 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:54,730 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 149 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:12:54,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-11-14 05:12:54,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 111. [2024-11-14 05:12:54,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 0 states have call successors, (0), 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 05:12:54,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2024-11-14 05:12:54,740 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 102 [2024-11-14 05:12:54,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:54,741 INFO L471 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2024-11-14 05:12:54,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.3478260869565215) internal successors, (123), 22 states have internal predecessors, (123), 0 states have call successors, (0), 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 05:12:54,741 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2024-11-14 05:12:54,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-11-14 05:12:54,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:54,742 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:54,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-11-14 05:12:54,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:54,943 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:54,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1988419262, now seen corresponding path program 22 times [2024-11-14 05:12:54,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:54,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567145072] [2024-11-14 05:12:54,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:54,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 530 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:12:55,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:12:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567145072] [2024-11-14 05:12:55,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567145072] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:12:55,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534871058] [2024-11-14 05:12:55,874 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:12:55,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:55,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:12:55,876 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:12:55,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-14 05:12:56,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:12:56,041 INFO L255 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-14 05:12:56,043 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:12:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:56,899 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:12:57,484 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 576 proven. 272 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:12:57,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534871058] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:12:57,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [146573312] [2024-11-14 05:12:57,485 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:12:57,485 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:12:57,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:12:57,486 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:12:57,486 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:12:57,648 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:12:58,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15002#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:12:58,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:12:58,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:12:58,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 56 [2024-11-14 05:12:58,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641281396] [2024-11-14 05:12:58,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:12:58,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-11-14 05:12:58,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:12:58,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-11-14 05:12:58,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=3392, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 05:12:58,179 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand has 56 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 56 states have internal predecessors, (186), 0 states have call successors, (0), 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 05:12:58,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:12:58,883 INFO L93 Difference]: Finished difference Result 237 states and 257 transitions. [2024-11-14 05:12:58,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 05:12:58,883 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 56 states have internal predecessors, (186), 0 states have call successors, (0), 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 110 [2024-11-14 05:12:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:12:58,884 INFO L225 Difference]: With dead ends: 237 [2024-11-14 05:12:58,885 INFO L226 Difference]: Without dead ends: 164 [2024-11-14 05:12:58,885 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 269 SyntacticMatches, 33 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1382, Invalid=5260, Unknown=0, NotChecked=0, Total=6642 [2024-11-14 05:12:58,886 INFO L432 NwaCegarLoop]: 36 mSDtfsCounter, 173 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:12:58,887 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 445 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:12:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-14 05:12:58,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 113. [2024-11-14 05:12:58,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 0 states have call successors, (0), 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 05:12:58,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2024-11-14 05:12:58,896 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 110 [2024-11-14 05:12:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:12:58,896 INFO L471 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2024-11-14 05:12:58,897 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 56 states have internal predecessors, (186), 0 states have call successors, (0), 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 05:12:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2024-11-14 05:12:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-11-14 05:12:58,897 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:12:58,898 INFO L215 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:12:58,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-11-14 05:12:59,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:12:59,098 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:12:59,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:12:59,099 INFO L85 PathProgramCache]: Analyzing trace with hash -1994304089, now seen corresponding path program 23 times [2024-11-14 05:12:59,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:12:59,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531354283] [2024-11-14 05:12:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:12:59,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:12:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:00,169 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 530 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:00,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:00,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531354283] [2024-11-14 05:13:00,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531354283] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:00,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022669679] [2024-11-14 05:13:00,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:13:00,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:00,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:00,172 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:00,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-11-14 05:13:00,358 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2024-11-14 05:13:00,358 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:00,361 INFO L255 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 05:13:00,363 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:01,319 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 578 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022669679] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [102939957] [2024-11-14 05:13:01,954 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:01,954 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:01,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:01,954 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:01,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:02,131 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:02,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16228#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:02,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:02,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 58 [2024-11-14 05:13:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353419176] [2024-11-14 05:13:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:02,667 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-11-14 05:13:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:02,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-11-14 05:13:02,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3595, Unknown=0, NotChecked=0, Total=4422 [2024-11-14 05:13:02,669 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand has 58 states, 58 states have (on average 3.2413793103448274) internal successors, (188), 58 states have internal predecessors, (188), 0 states have call successors, (0), 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 05:13:03,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:03,348 INFO L93 Difference]: Finished difference Result 244 states and 265 transitions. [2024-11-14 05:13:03,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-14 05:13:03,349 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.2413793103448274) internal successors, (188), 58 states have internal predecessors, (188), 0 states have call successors, (0), 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 112 [2024-11-14 05:13:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:03,350 INFO L225 Difference]: With dead ends: 244 [2024-11-14 05:13:03,350 INFO L226 Difference]: Without dead ends: 169 [2024-11-14 05:13:03,351 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 272 SyntacticMatches, 35 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2811 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1513, Invalid=5627, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 05:13:03,352 INFO L432 NwaCegarLoop]: 38 mSDtfsCounter, 134 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 391 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:03,352 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 391 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:13:03,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-11-14 05:13:03,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 115. [2024-11-14 05:13:03,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0263157894736843) internal successors, (117), 114 states have internal predecessors, (117), 0 states have call successors, (0), 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 05:13:03,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2024-11-14 05:13:03,362 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 112 [2024-11-14 05:13:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:03,362 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2024-11-14 05:13:03,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.2413793103448274) internal successors, (188), 58 states have internal predecessors, (188), 0 states have call successors, (0), 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 05:13:03,363 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2024-11-14 05:13:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2024-11-14 05:13:03,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:03,363 INFO L215 NwaCegarLoop]: trace histogram [19, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:03,383 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-11-14 05:13:03,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:03,564 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:03,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:03,564 INFO L85 PathProgramCache]: Analyzing trace with hash 940311756, now seen corresponding path program 24 times [2024-11-14 05:13:03,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:03,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262534606] [2024-11-14 05:13:03,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:03,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:03,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:04,245 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 306 proven. 614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:04,246 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:04,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262534606] [2024-11-14 05:13:04,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262534606] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:04,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164072828] [2024-11-14 05:13:04,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:13:04,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:04,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:04,248 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:04,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-11-14 05:13:04,417 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:13:04,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:04,420 INFO L255 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 05:13:04,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:04,585 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:05,054 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 342 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:05,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164072828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:05,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [344399450] [2024-11-14 05:13:05,056 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:05,056 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:05,056 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:05,056 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:05,056 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:05,193 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:05,520 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17447#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:05,520 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:05,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:05,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 24 [2024-11-14 05:13:05,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737178992] [2024-11-14 05:13:05,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:05,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 05:13:05,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 05:13:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=840, Unknown=0, NotChecked=0, Total=1122 [2024-11-14 05:13:05,522 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 25 states, 25 states have (on average 5.4) internal successors, (135), 24 states have internal predecessors, (135), 0 states have call successors, (0), 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 05:13:05,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:05,900 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2024-11-14 05:13:05,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 05:13:05,900 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 24 states have internal predecessors, (135), 0 states have call successors, (0), 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 114 [2024-11-14 05:13:05,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:05,902 INFO L225 Difference]: With dead ends: 132 [2024-11-14 05:13:05,902 INFO L226 Difference]: Without dead ends: 130 [2024-11-14 05:13:05,903 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 310 SyntacticMatches, 36 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=738, Invalid=2018, Unknown=0, NotChecked=0, Total=2756 [2024-11-14 05:13:05,903 INFO L432 NwaCegarLoop]: 27 mSDtfsCounter, 10 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:05,903 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 186 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:13:05,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-11-14 05:13:05,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2024-11-14 05:13:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:13:05,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2024-11-14 05:13:05,912 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 114 [2024-11-14 05:13:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:05,912 INFO L471 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2024-11-14 05:13:05,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.4) internal successors, (135), 24 states have internal predecessors, (135), 0 states have call successors, (0), 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 05:13:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2024-11-14 05:13:05,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2024-11-14 05:13:05,913 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:05,913 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:05,931 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-11-14 05:13:06,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-14 05:13:06,114 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:06,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1920751922, now seen corresponding path program 25 times [2024-11-14 05:13:06,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:06,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645294907] [2024-11-14 05:13:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 668 proven. 396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:07,296 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:07,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645294907] [2024-11-14 05:13:07,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645294907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:07,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678069052] [2024-11-14 05:13:07,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:13:07,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:07,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:07,301 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:07,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-11-14 05:13:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:07,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-14 05:13:07,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 720 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:08,455 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 720 proven. 342 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:09,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678069052] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:09,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1292238586] [2024-11-14 05:13:09,179 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:09,179 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:09,179 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:09,179 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:09,179 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:09,330 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:09,870 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18618#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:09,870 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:09,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:09,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 62 [2024-11-14 05:13:09,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083239740] [2024-11-14 05:13:09,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:09,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-11-14 05:13:09,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:09,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-11-14 05:13:09,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=4040, Unknown=0, NotChecked=0, Total=4970 [2024-11-14 05:13:09,871 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand has 62 states, 62 states have (on average 3.3225806451612905) internal successors, (206), 62 states have internal predecessors, (206), 0 states have call successors, (0), 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 05:13:10,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:10,757 INFO L93 Difference]: Finished difference Result 263 states and 285 transitions. [2024-11-14 05:13:10,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-14 05:13:10,757 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.3225806451612905) internal successors, (206), 62 states have internal predecessors, (206), 0 states have call successors, (0), 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 122 [2024-11-14 05:13:10,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:10,758 INFO L225 Difference]: With dead ends: 263 [2024-11-14 05:13:10,758 INFO L226 Difference]: Without dead ends: 182 [2024-11-14 05:13:10,760 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 299 SyntacticMatches, 37 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3166 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1692, Invalid=6318, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 05:13:10,760 INFO L432 NwaCegarLoop]: 40 mSDtfsCounter, 163 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:10,761 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 385 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:13:10,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2024-11-14 05:13:10,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 125. [2024-11-14 05:13:10,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0241935483870968) internal successors, (127), 124 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 127 transitions. [2024-11-14 05:13:10,771 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 127 transitions. Word has length 122 [2024-11-14 05:13:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:10,771 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 127 transitions. [2024-11-14 05:13:10,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.3225806451612905) internal successors, (206), 62 states have internal predecessors, (206), 0 states have call successors, (0), 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 05:13:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 127 transitions. [2024-11-14 05:13:10,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-11-14 05:13:10,772 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:10,773 INFO L215 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:10,797 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-11-14 05:13:10,973 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-14 05:13:10,973 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:10,974 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:10,974 INFO L85 PathProgramCache]: Analyzing trace with hash -534372841, now seen corresponding path program 26 times [2024-11-14 05:13:10,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:10,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529707633] [2024-11-14 05:13:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:10,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:12,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 668 proven. 434 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:12,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:12,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529707633] [2024-11-14 05:13:12,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529707633] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:12,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694428655] [2024-11-14 05:13:12,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:13:12,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:12,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:12,265 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:12,268 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-11-14 05:13:12,496 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2024-11-14 05:13:12,496 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:12,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-14 05:13:12,502 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:13,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 722 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:13,604 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:14,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 722 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:14,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694428655] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:14,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75665035] [2024-11-14 05:13:14,371 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:14,372 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:14,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:14,372 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:14,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:14,579 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:15,238 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19976#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:15,238 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:15,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:15,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 64 [2024-11-14 05:13:15,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346909608] [2024-11-14 05:13:15,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:15,239 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-11-14 05:13:15,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:15,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-11-14 05:13:15,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=995, Invalid=4261, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 05:13:15,240 INFO L87 Difference]: Start difference. First operand 125 states and 127 transitions. Second operand has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 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 05:13:16,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:16,051 INFO L93 Difference]: Finished difference Result 270 states and 293 transitions. [2024-11-14 05:13:16,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 05:13:16,051 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 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 124 [2024-11-14 05:13:16,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:16,053 INFO L225 Difference]: With dead ends: 270 [2024-11-14 05:13:16,053 INFO L226 Difference]: Without dead ends: 187 [2024-11-14 05:13:16,054 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 302 SyntacticMatches, 39 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1837, Invalid=6719, Unknown=0, NotChecked=0, Total=8556 [2024-11-14 05:13:16,055 INFO L432 NwaCegarLoop]: 42 mSDtfsCounter, 204 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:16,055 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [204 Valid, 437 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:13:16,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-11-14 05:13:16,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 127. [2024-11-14 05:13:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0238095238095237) internal successors, (129), 126 states have internal predecessors, (129), 0 states have call successors, (0), 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 05:13:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2024-11-14 05:13:16,067 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 124 [2024-11-14 05:13:16,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:16,067 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2024-11-14 05:13:16,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.25) internal successors, (208), 64 states have internal predecessors, (208), 0 states have call successors, (0), 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 05:13:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2024-11-14 05:13:16,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-11-14 05:13:16,068 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:16,068 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:16,094 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-11-14 05:13:16,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-14 05:13:16,269 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:16,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1972224580, now seen corresponding path program 27 times [2024-11-14 05:13:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:16,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161812706] [2024-11-14 05:13:16,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:16,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:17,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 380 proven. 762 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:17,147 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161812706] [2024-11-14 05:13:17,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161812706] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:17,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963090190] [2024-11-14 05:13:17,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:13:17,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:17,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:17,153 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:17,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-11-14 05:13:17,359 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:13:17,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:17,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 05:13:17,365 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:17,554 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:18,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1142 backedges. 420 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963090190] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:18,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [841731521] [2024-11-14 05:13:18,106 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:18,106 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:18,106 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:18,106 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:18,107 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:18,281 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:18,716 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21323#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:18,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:18,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:18,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 26 [2024-11-14 05:13:18,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413172338] [2024-11-14 05:13:18,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:18,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 05:13:18,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:18,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 05:13:18,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 05:13:18,719 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 27 states, 27 states have (on average 5.444444444444445) internal successors, (147), 26 states have internal predecessors, (147), 0 states have call successors, (0), 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 05:13:19,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:19,110 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2024-11-14 05:13:19,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 05:13:19,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.444444444444445) internal successors, (147), 26 states have internal predecessors, (147), 0 states have call successors, (0), 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 126 [2024-11-14 05:13:19,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:19,112 INFO L225 Difference]: With dead ends: 144 [2024-11-14 05:13:19,112 INFO L226 Difference]: Without dead ends: 142 [2024-11-14 05:13:19,113 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 343 SyntacticMatches, 41 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2024-11-14 05:13:19,114 INFO L432 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:19,114 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 193 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 05:13:19,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-14 05:13:19,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 135. [2024-11-14 05:13:19,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 0 states have call successors, (0), 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 05:13:19,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2024-11-14 05:13:19,126 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 126 [2024-11-14 05:13:19,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:19,127 INFO L471 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2024-11-14 05:13:19,127 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.444444444444445) internal successors, (147), 26 states have internal predecessors, (147), 0 states have call successors, (0), 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 05:13:19,127 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2024-11-14 05:13:19,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-11-14 05:13:19,128 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:19,128 INFO L215 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:19,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-11-14 05:13:19,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:19,332 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:19,333 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:19,333 INFO L85 PathProgramCache]: Analyzing trace with hash -145579486, now seen corresponding path program 28 times [2024-11-14 05:13:19,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810084922] [2024-11-14 05:13:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 822 proven. 480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:20,580 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:20,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810084922] [2024-11-14 05:13:20,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810084922] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:20,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685581694] [2024-11-14 05:13:20,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:13:20,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:20,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:20,582 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:20,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-11-14 05:13:20,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:20,764 INFO L255 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-14 05:13:20,767 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:21,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 880 proven. 420 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:21,921 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 880 proven. 420 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:22,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685581694] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:22,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [13281569] [2024-11-14 05:13:22,724 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:22,724 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:22,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:22,725 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:22,725 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:22,878 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:23,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22608#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:23,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:23,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:23,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 68 [2024-11-14 05:13:23,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154645980] [2024-11-14 05:13:23,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:23,465 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-11-14 05:13:23,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:23,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-11-14 05:13:23,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1108, Invalid=4744, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 05:13:23,466 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand has 68 states, 68 states have (on average 3.323529411764706) internal successors, (226), 68 states have internal predecessors, (226), 0 states have call successors, (0), 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 05:13:24,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:24,247 INFO L93 Difference]: Finished difference Result 289 states and 313 transitions. [2024-11-14 05:13:24,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-14 05:13:24,248 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.323529411764706) internal successors, (226), 68 states have internal predecessors, (226), 0 states have call successors, (0), 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 134 [2024-11-14 05:13:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:24,249 INFO L225 Difference]: With dead ends: 289 [2024-11-14 05:13:24,249 INFO L226 Difference]: Without dead ends: 200 [2024-11-14 05:13:24,250 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 329 SyntacticMatches, 41 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3750 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2034, Invalid=7472, Unknown=0, NotChecked=0, Total=9506 [2024-11-14 05:13:24,250 INFO L432 NwaCegarLoop]: 44 mSDtfsCounter, 147 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:24,250 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 481 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:13:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2024-11-14 05:13:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 137. [2024-11-14 05:13:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0220588235294117) internal successors, (139), 136 states have internal predecessors, (139), 0 states have call successors, (0), 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 05:13:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2024-11-14 05:13:24,259 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 134 [2024-11-14 05:13:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:24,259 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2024-11-14 05:13:24,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.323529411764706) internal successors, (226), 68 states have internal predecessors, (226), 0 states have call successors, (0), 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 05:13:24,260 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2024-11-14 05:13:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-11-14 05:13:24,261 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:24,261 INFO L215 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:24,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-11-14 05:13:24,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:24,461 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:24,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:24,462 INFO L85 PathProgramCache]: Analyzing trace with hash -609536121, now seen corresponding path program 29 times [2024-11-14 05:13:24,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:24,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477364040] [2024-11-14 05:13:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:24,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 822 proven. 522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:25,593 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:25,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477364040] [2024-11-14 05:13:25,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477364040] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:25,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211112551] [2024-11-14 05:13:25,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:13:25,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:25,597 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:25,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-11-14 05:13:25,820 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-11-14 05:13:25,821 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:25,823 INFO L255 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-11-14 05:13:25,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 882 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:26,987 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:27,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 882 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:27,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211112551] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:27,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1955170826] [2024-11-14 05:13:27,851 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:27,851 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:27,852 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:27,852 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:27,852 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:28,023 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:28,580 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24098#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:28,580 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:28,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:28,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 70 [2024-11-14 05:13:28,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099995286] [2024-11-14 05:13:28,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:28,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 05:13:28,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:28,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 05:13:28,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=4983, Unknown=0, NotChecked=0, Total=6162 [2024-11-14 05:13:28,582 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand has 70 states, 70 states have (on average 3.257142857142857) internal successors, (228), 70 states have internal predecessors, (228), 0 states have call successors, (0), 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 05:13:29,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:29,440 INFO L93 Difference]: Finished difference Result 296 states and 321 transitions. [2024-11-14 05:13:29,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-11-14 05:13:29,441 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.257142857142857) internal successors, (228), 70 states have internal predecessors, (228), 0 states have call successors, (0), 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 136 [2024-11-14 05:13:29,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:29,442 INFO L225 Difference]: With dead ends: 296 [2024-11-14 05:13:29,442 INFO L226 Difference]: Without dead ends: 205 [2024-11-14 05:13:29,443 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 332 SyntacticMatches, 43 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3963 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2193, Invalid=7907, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 05:13:29,444 INFO L432 NwaCegarLoop]: 46 mSDtfsCounter, 202 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:29,444 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 465 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:13:29,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-11-14 05:13:29,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 139. [2024-11-14 05:13:29,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0217391304347827) internal successors, (141), 138 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:13:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2024-11-14 05:13:29,476 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 136 [2024-11-14 05:13:29,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:29,476 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2024-11-14 05:13:29,476 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.257142857142857) internal successors, (228), 70 states have internal predecessors, (228), 0 states have call successors, (0), 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 05:13:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2024-11-14 05:13:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2024-11-14 05:13:29,477 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:29,477 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:29,499 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-11-14 05:13:29,678 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-11-14 05:13:29,678 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:29,678 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash 204736428, now seen corresponding path program 30 times [2024-11-14 05:13:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:29,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444671593] [2024-11-14 05:13:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:29,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 462 proven. 926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:30,460 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:30,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444671593] [2024-11-14 05:13:30,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444671593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:30,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597972787] [2024-11-14 05:13:30,460 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:13:30,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:30,462 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:30,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-11-14 05:13:30,672 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:13:30,672 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:30,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 05:13:30,678 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:30,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:30,866 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:31,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1388 backedges. 506 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:31,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597972787] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:31,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1115959205] [2024-11-14 05:13:31,479 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:31,479 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:31,479 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:31,479 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:31,479 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:31,598 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:31,931 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25573#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:31,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:31,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 28 [2024-11-14 05:13:31,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457943019] [2024-11-14 05:13:31,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:31,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-14 05:13:31,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-14 05:13:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1030, Unknown=0, NotChecked=0, Total=1406 [2024-11-14 05:13:31,933 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 29 states, 29 states have (on average 5.482758620689655) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 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 05:13:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:32,411 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2024-11-14 05:13:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:13:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.482758620689655) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 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 138 [2024-11-14 05:13:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:32,412 INFO L225 Difference]: With dead ends: 156 [2024-11-14 05:13:32,412 INFO L226 Difference]: Without dead ends: 154 [2024-11-14 05:13:32,413 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 378 SyntacticMatches, 44 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1020, Invalid=2640, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 05:13:32,413 INFO L432 NwaCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:32,414 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 236 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:13:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2024-11-14 05:13:32,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2024-11-14 05:13:32,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 0 states have call successors, (0), 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 05:13:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2024-11-14 05:13:32,426 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 138 [2024-11-14 05:13:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:32,426 INFO L471 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2024-11-14 05:13:32,427 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.482758620689655) internal successors, (159), 28 states have internal predecessors, (159), 0 states have call successors, (0), 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 05:13:32,427 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2024-11-14 05:13:32,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-11-14 05:13:32,427 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:32,428 INFO L215 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:32,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-11-14 05:13:32,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:32,628 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:32,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:32,629 INFO L85 PathProgramCache]: Analyzing trace with hash -480019438, now seen corresponding path program 31 times [2024-11-14 05:13:32,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:32,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941379369] [2024-11-14 05:13:32,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:32,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:33,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 992 proven. 572 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:33,940 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941379369] [2024-11-14 05:13:33,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941379369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:33,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745338814] [2024-11-14 05:13:33,940 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:13:33,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:33,941 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:33,942 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:33,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-11-14 05:13:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:34,139 INFO L255 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 05:13:34,141 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:35,409 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 1056 proven. 506 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:36,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745338814] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:36,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1016641252] [2024-11-14 05:13:36,427 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:36,427 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:36,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:36,428 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:36,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:36,550 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:37,141 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26972#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:37,142 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:37,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:37,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 74 [2024-11-14 05:13:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985394827] [2024-11-14 05:13:37,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:37,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-11-14 05:13:37,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:37,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-11-14 05:13:37,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1302, Invalid=5504, Unknown=0, NotChecked=0, Total=6806 [2024-11-14 05:13:37,144 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand has 74 states, 74 states have (on average 3.324324324324324) internal successors, (246), 74 states have internal predecessors, (246), 0 states have call successors, (0), 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 05:13:38,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:38,028 INFO L93 Difference]: Finished difference Result 315 states and 341 transitions. [2024-11-14 05:13:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 05:13:38,028 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.324324324324324) internal successors, (246), 74 states have internal predecessors, (246), 0 states have call successors, (0), 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 146 [2024-11-14 05:13:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:38,029 INFO L225 Difference]: With dead ends: 315 [2024-11-14 05:13:38,029 INFO L226 Difference]: Without dead ends: 218 [2024-11-14 05:13:38,030 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 359 SyntacticMatches, 45 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4382 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2408, Invalid=8722, Unknown=0, NotChecked=0, Total=11130 [2024-11-14 05:13:38,031 INFO L432 NwaCegarLoop]: 48 mSDtfsCounter, 172 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:38,031 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 454 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:13:38,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-11-14 05:13:38,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 149. [2024-11-14 05:13:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0202702702702702) internal successors, (151), 148 states have internal predecessors, (151), 0 states have call successors, (0), 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 05:13:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2024-11-14 05:13:38,045 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 146 [2024-11-14 05:13:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:38,045 INFO L471 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2024-11-14 05:13:38,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.324324324324324) internal successors, (246), 74 states have internal predecessors, (246), 0 states have call successors, (0), 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 05:13:38,046 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2024-11-14 05:13:38,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2024-11-14 05:13:38,047 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:38,047 INFO L215 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:38,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-11-14 05:13:38,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-11-14 05:13:38,247 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:38,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:38,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1614160375, now seen corresponding path program 32 times [2024-11-14 05:13:38,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:38,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521206574] [2024-11-14 05:13:38,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:38,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:39,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 992 proven. 618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:39,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:39,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521206574] [2024-11-14 05:13:39,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521206574] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:39,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197995370] [2024-11-14 05:13:39,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:13:39,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:39,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:39,677 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:39,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-11-14 05:13:39,936 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2024-11-14 05:13:39,936 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:39,939 INFO L255 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 05:13:39,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:41,324 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 1058 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:42,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197995370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:42,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1950746717] [2024-11-14 05:13:42,357 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:42,357 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:42,358 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:42,358 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:42,358 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:42,486 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:43,133 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28594#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:43,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:43,133 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:43,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 76 [2024-11-14 05:13:43,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966587907] [2024-11-14 05:13:43,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:43,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2024-11-14 05:13:43,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:43,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2024-11-14 05:13:43,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1379, Invalid=5761, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 05:13:43,135 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand has 76 states, 76 states have (on average 3.263157894736842) internal successors, (248), 76 states have internal predecessors, (248), 0 states have call successors, (0), 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 05:13:44,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:44,121 INFO L93 Difference]: Finished difference Result 322 states and 349 transitions. [2024-11-14 05:13:44,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 05:13:44,122 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.263157894736842) internal successors, (248), 76 states have internal predecessors, (248), 0 states have call successors, (0), 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 148 [2024-11-14 05:13:44,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:44,123 INFO L225 Difference]: With dead ends: 322 [2024-11-14 05:13:44,123 INFO L226 Difference]: Without dead ends: 223 [2024-11-14 05:13:44,124 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 362 SyntacticMatches, 47 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4611 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=2581, Invalid=9191, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 05:13:44,125 INFO L432 NwaCegarLoop]: 50 mSDtfsCounter, 195 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:44,125 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 516 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:13:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-11-14 05:13:44,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 151. [2024-11-14 05:13:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.02) internal successors, (153), 150 states have internal predecessors, (153), 0 states have call successors, (0), 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 05:13:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2024-11-14 05:13:44,140 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 148 [2024-11-14 05:13:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:44,140 INFO L471 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2024-11-14 05:13:44,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.263157894736842) internal successors, (248), 76 states have internal predecessors, (248), 0 states have call successors, (0), 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 05:13:44,141 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2024-11-14 05:13:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-11-14 05:13:44,142 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:44,142 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:44,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-11-14 05:13:44,342 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-11-14 05:13:44,343 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:44,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:44,343 INFO L85 PathProgramCache]: Analyzing trace with hash -218701156, now seen corresponding path program 33 times [2024-11-14 05:13:44,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:44,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516761905] [2024-11-14 05:13:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:44,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:44,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 552 proven. 1106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:45,236 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516761905] [2024-11-14 05:13:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516761905] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617462201] [2024-11-14 05:13:45,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:13:45,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:45,239 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:45,240 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-11-14 05:13:45,463 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:13:45,463 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:45,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 05:13:45,468 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:45,683 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:46,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1658 backedges. 600 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:46,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617462201] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:46,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284770418] [2024-11-14 05:13:46,417 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:46,417 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:46,417 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:46,417 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:46,417 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:46,546 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:46,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30197#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:46,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:46,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:46,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 30 [2024-11-14 05:13:46,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20915] [2024-11-14 05:13:46,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:46,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-14 05:13:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-14 05:13:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1131, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 05:13:46,904 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 31 states, 31 states have (on average 5.516129032258065) internal successors, (171), 30 states have internal predecessors, (171), 0 states have call successors, (0), 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 05:13:47,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:47,406 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2024-11-14 05:13:47,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 05:13:47,407 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.516129032258065) internal successors, (171), 30 states have internal predecessors, (171), 0 states have call successors, (0), 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 150 [2024-11-14 05:13:47,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:47,407 INFO L225 Difference]: With dead ends: 168 [2024-11-14 05:13:47,408 INFO L226 Difference]: Without dead ends: 166 [2024-11-14 05:13:47,408 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 412 SyntacticMatches, 48 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1902 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1179, Invalid=2981, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 05:13:47,408 INFO L432 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:47,409 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 241 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:13:47,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-11-14 05:13:47,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2024-11-14 05:13:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 0 states have call successors, (0), 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 05:13:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2024-11-14 05:13:47,422 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 150 [2024-11-14 05:13:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:47,422 INFO L471 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2024-11-14 05:13:47,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.516129032258065) internal successors, (171), 30 states have internal predecessors, (171), 0 states have call successors, (0), 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 05:13:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2024-11-14 05:13:47,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-11-14 05:13:47,423 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:47,423 INFO L215 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:47,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-11-14 05:13:47,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-11-14 05:13:47,624 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:47,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:47,624 INFO L85 PathProgramCache]: Analyzing trace with hash 785671938, now seen corresponding path program 34 times [2024-11-14 05:13:47,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:47,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781550373] [2024-11-14 05:13:47,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:47,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:47,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1178 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:49,094 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781550373] [2024-11-14 05:13:49,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781550373] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:49,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127585390] [2024-11-14 05:13:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:13:49,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:49,096 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:49,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-11-14 05:13:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:49,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 583 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-11-14 05:13:49,317 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1248 proven. 600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:50,757 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 1248 proven. 600 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:13:51,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127585390] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:51,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1758084743] [2024-11-14 05:13:51,793 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:51,793 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:51,793 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:51,793 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:51,793 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:51,938 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:52,541 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31710#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:52,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:52,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:52,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 80 [2024-11-14 05:13:52,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784409343] [2024-11-14 05:13:52,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:52,542 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2024-11-14 05:13:52,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:52,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2024-11-14 05:13:52,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1512, Invalid=6320, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 05:13:52,543 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand has 80 states, 80 states have (on average 3.325) internal successors, (266), 80 states have internal predecessors, (266), 0 states have call successors, (0), 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 05:13:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:13:53,658 INFO L93 Difference]: Finished difference Result 341 states and 369 transitions. [2024-11-14 05:13:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2024-11-14 05:13:53,658 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.325) internal successors, (266), 80 states have internal predecessors, (266), 0 states have call successors, (0), 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 158 [2024-11-14 05:13:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:13:53,659 INFO L225 Difference]: With dead ends: 341 [2024-11-14 05:13:53,659 INFO L226 Difference]: Without dead ends: 236 [2024-11-14 05:13:53,660 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 389 SyntacticMatches, 49 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5062 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2814, Invalid=10068, Unknown=0, NotChecked=0, Total=12882 [2024-11-14 05:13:53,660 INFO L432 NwaCegarLoop]: 52 mSDtfsCounter, 233 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:13:53,660 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 581 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:13:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-11-14 05:13:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 161. [2024-11-14 05:13:53,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.01875) internal successors, (163), 160 states have internal predecessors, (163), 0 states have call successors, (0), 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 05:13:53,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 163 transitions. [2024-11-14 05:13:53,674 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 163 transitions. Word has length 158 [2024-11-14 05:13:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:13:53,674 INFO L471 AbstractCegarLoop]: Abstraction has 161 states and 163 transitions. [2024-11-14 05:13:53,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.325) internal successors, (266), 80 states have internal predecessors, (266), 0 states have call successors, (0), 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 05:13:53,674 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 163 transitions. [2024-11-14 05:13:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2024-11-14 05:13:53,675 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:13:53,675 INFO L215 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:13:53,700 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-11-14 05:13:53,876 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-11-14 05:13:53,876 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:13:53,876 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:13:53,876 INFO L85 PathProgramCache]: Analyzing trace with hash -821273241, now seen corresponding path program 35 times [2024-11-14 05:13:53,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:13:53,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39201253] [2024-11-14 05:13:53,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:13:53,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:13:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:13:55,450 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1178 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:55,450 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:13:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39201253] [2024-11-14 05:13:55,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39201253] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:13:55,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233250555] [2024-11-14 05:13:55,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:13:55,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:13:55,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:13:55,452 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:13:55,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-11-14 05:13:55,737 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2024-11-14 05:13:55,737 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:13:55,740 INFO L255 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-14 05:13:55,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:13:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:57,301 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:13:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1900 backedges. 1250 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:13:58,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233250555] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:13:58,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [529970015] [2024-11-14 05:13:58,466 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:13:58,466 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:13:58,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:13:58,466 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:13:58,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:13:58,627 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:13:59,262 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '33464#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:13:59,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:13:59,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:13:59,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 82 [2024-11-14 05:13:59,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074651097] [2024-11-14 05:13:59,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:13:59,263 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2024-11-14 05:13:59,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:13:59,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2024-11-14 05:13:59,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1595, Invalid=6595, Unknown=0, NotChecked=0, Total=8190 [2024-11-14 05:13:59,265 INFO L87 Difference]: Start difference. First operand 161 states and 163 transitions. Second operand has 82 states, 82 states have (on average 3.268292682926829) internal successors, (268), 82 states have internal predecessors, (268), 0 states have call successors, (0), 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 05:14:00,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:00,381 INFO L93 Difference]: Finished difference Result 348 states and 377 transitions. [2024-11-14 05:14:00,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-11-14 05:14:00,381 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.268292682926829) internal successors, (268), 82 states have internal predecessors, (268), 0 states have call successors, (0), 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 160 [2024-11-14 05:14:00,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:00,383 INFO L225 Difference]: With dead ends: 348 [2024-11-14 05:14:00,383 INFO L226 Difference]: Without dead ends: 241 [2024-11-14 05:14:00,384 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 392 SyntacticMatches, 51 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5307 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3001, Invalid=10571, Unknown=0, NotChecked=0, Total=13572 [2024-11-14 05:14:00,384 INFO L432 NwaCegarLoop]: 54 mSDtfsCounter, 232 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:00,385 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 549 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:14:00,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-11-14 05:14:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 163. [2024-11-14 05:14:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 0 states have call successors, (0), 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 05:14:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2024-11-14 05:14:00,400 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 160 [2024-11-14 05:14:00,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:00,400 INFO L471 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2024-11-14 05:14:00,401 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.268292682926829) internal successors, (268), 82 states have internal predecessors, (268), 0 states have call successors, (0), 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 05:14:00,401 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2024-11-14 05:14:00,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2024-11-14 05:14:00,402 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:00,402 INFO L215 NwaCegarLoop]: trace histogram [27, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:00,425 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-11-14 05:14:00,602 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-11-14 05:14:00,602 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:00,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:00,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1092636300, now seen corresponding path program 36 times [2024-11-14 05:14:00,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:00,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710023287] [2024-11-14 05:14:00,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:00,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:00,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:01,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 650 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:01,554 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710023287] [2024-11-14 05:14:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710023287] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851540971] [2024-11-14 05:14:01,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:14:01,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:01,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:01,556 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:01,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-11-14 05:14:01,829 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:14:01,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:01,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 05:14:01,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:02,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:02,068 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:02,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1952 backedges. 702 proven. 1250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:02,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851540971] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:02,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1901595013] [2024-11-14 05:14:02,902 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:02,902 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:02,902 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:02,902 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:02,902 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:03,031 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:03,427 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '35195#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:03,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:03,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:03,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 32 [2024-11-14 05:14:03,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248117057] [2024-11-14 05:14:03,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:03,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-14 05:14:03,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:03,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-14 05:14:03,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=486, Invalid=1236, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 05:14:03,429 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 32 states have internal predecessors, (183), 0 states have call successors, (0), 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 05:14:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:03,980 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2024-11-14 05:14:03,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 05:14:03,980 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 32 states have internal predecessors, (183), 0 states have call successors, (0), 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 162 [2024-11-14 05:14:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:03,981 INFO L225 Difference]: With dead ends: 180 [2024-11-14 05:14:03,981 INFO L226 Difference]: Without dead ends: 178 [2024-11-14 05:14:03,982 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 446 SyntacticMatches, 52 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1350, Invalid=3342, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 05:14:03,982 INFO L432 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:03,982 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 270 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:14:03,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2024-11-14 05:14:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2024-11-14 05:14:03,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0176470588235293) internal successors, (173), 170 states have internal predecessors, (173), 0 states have call successors, (0), 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 05:14:03,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2024-11-14 05:14:03,996 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 162 [2024-11-14 05:14:03,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:03,997 INFO L471 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2024-11-14 05:14:03,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 32 states have internal predecessors, (183), 0 states have call successors, (0), 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 05:14:03,997 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2024-11-14 05:14:03,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2024-11-14 05:14:03,998 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:03,998 INFO L215 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:04,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-11-14 05:14:04,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-11-14 05:14:04,198 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:04,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:04,199 INFO L85 PathProgramCache]: Analyzing trace with hash -561323278, now seen corresponding path program 37 times [2024-11-14 05:14:04,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:04,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516613572] [2024-11-14 05:14:04,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:04,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1380 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:05,962 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516613572] [2024-11-14 05:14:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516613572] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:05,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700748496] [2024-11-14 05:14:05,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:14:05,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:05,966 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:05,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-11-14 05:14:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:06,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-11-14 05:14:06,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:07,938 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:07,938 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:09,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 1456 proven. 702 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:09,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700748496] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:09,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1107194898] [2024-11-14 05:14:09,226 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:09,226 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:09,226 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:09,226 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:09,226 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:09,468 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:10,176 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36822#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:10,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:10,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:10,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 86 [2024-11-14 05:14:10,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545115783] [2024-11-14 05:14:10,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:10,176 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-11-14 05:14:10,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:10,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-11-14 05:14:10,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1738, Invalid=7192, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 05:14:10,178 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand has 86 states, 86 states have (on average 3.3255813953488373) internal successors, (286), 86 states have internal predecessors, (286), 0 states have call successors, (0), 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 05:14:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:11,375 INFO L93 Difference]: Finished difference Result 367 states and 397 transitions. [2024-11-14 05:14:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-11-14 05:14:11,375 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.3255813953488373) internal successors, (286), 86 states have internal predecessors, (286), 0 states have call successors, (0), 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 170 [2024-11-14 05:14:11,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:11,376 INFO L225 Difference]: With dead ends: 367 [2024-11-14 05:14:11,377 INFO L226 Difference]: Without dead ends: 254 [2024-11-14 05:14:11,378 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 592 GetRequests, 419 SyntacticMatches, 53 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5790 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=3252, Invalid=11510, Unknown=0, NotChecked=0, Total=14762 [2024-11-14 05:14:11,379 INFO L432 NwaCegarLoop]: 56 mSDtfsCounter, 255 mSDsluCounter, 601 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:11,379 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 657 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:14:11,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-11-14 05:14:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 173. [2024-11-14 05:14:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 0 states have call successors, (0), 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 05:14:11,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2024-11-14 05:14:11,395 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 170 [2024-11-14 05:14:11,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:11,395 INFO L471 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2024-11-14 05:14:11,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.3255813953488373) internal successors, (286), 86 states have internal predecessors, (286), 0 states have call successors, (0), 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 05:14:11,396 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2024-11-14 05:14:11,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2024-11-14 05:14:11,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:11,397 INFO L215 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:11,421 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-11-14 05:14:11,597 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-11-14 05:14:11,597 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:11,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:11,598 INFO L85 PathProgramCache]: Analyzing trace with hash -432838185, now seen corresponding path program 38 times [2024-11-14 05:14:11,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:11,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025905104] [2024-11-14 05:14:11,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:11,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:11,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1380 proven. 834 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:13,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:13,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025905104] [2024-11-14 05:14:13,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025905104] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:13,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075869984] [2024-11-14 05:14:13,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:14:13,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:13,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:13,502 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:13,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-11-14 05:14:13,828 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2024-11-14 05:14:13,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:13,832 INFO L255 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-11-14 05:14:13,834 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:15,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:15,577 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:17,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 1458 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:17,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075869984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:17,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1070893848] [2024-11-14 05:14:17,004 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:17,004 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:17,004 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:17,004 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:17,004 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:17,117 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:17,788 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '38708#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:17,788 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:17,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:17,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 88 [2024-11-14 05:14:17,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373967692] [2024-11-14 05:14:17,788 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:17,789 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2024-11-14 05:14:17,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:17,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2024-11-14 05:14:17,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1827, Invalid=7485, Unknown=0, NotChecked=0, Total=9312 [2024-11-14 05:14:17,791 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand has 88 states, 88 states have (on average 3.272727272727273) internal successors, (288), 88 states have internal predecessors, (288), 0 states have call successors, (0), 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 05:14:19,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:19,099 INFO L93 Difference]: Finished difference Result 374 states and 405 transitions. [2024-11-14 05:14:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-11-14 05:14:19,100 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.272727272727273) internal successors, (288), 88 states have internal predecessors, (288), 0 states have call successors, (0), 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 172 [2024-11-14 05:14:19,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:19,101 INFO L225 Difference]: With dead ends: 374 [2024-11-14 05:14:19,101 INFO L226 Difference]: Without dead ends: 259 [2024-11-14 05:14:19,102 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 422 SyntacticMatches, 55 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6051 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=3453, Invalid=12047, Unknown=0, NotChecked=0, Total=15500 [2024-11-14 05:14:19,102 INFO L432 NwaCegarLoop]: 58 mSDtfsCounter, 284 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:19,103 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 687 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:14:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-11-14 05:14:19,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 175. [2024-11-14 05:14:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0172413793103448) internal successors, (177), 174 states have internal predecessors, (177), 0 states have call successors, (0), 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 05:14:19,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2024-11-14 05:14:19,120 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 172 [2024-11-14 05:14:19,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:19,120 INFO L471 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2024-11-14 05:14:19,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.272727272727273) internal successors, (288), 88 states have internal predecessors, (288), 0 states have call successors, (0), 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 05:14:19,121 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2024-11-14 05:14:19,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-11-14 05:14:19,121 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:19,122 INFO L215 NwaCegarLoop]: trace histogram [29, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:19,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-11-14 05:14:19,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:19,325 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:19,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:19,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1512715396, now seen corresponding path program 39 times [2024-11-14 05:14:19,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:19,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118050324] [2024-11-14 05:14:19,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:19,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 756 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:20,558 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:20,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118050324] [2024-11-14 05:14:20,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118050324] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:20,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978297930] [2024-11-14 05:14:20,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:14:20,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:20,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:20,560 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:20,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-11-14 05:14:20,829 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:14:20,829 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:20,833 INFO L255 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 05:14:20,835 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:21,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2270 backedges. 812 proven. 1458 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:22,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978297930] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:22,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1801428879] [2024-11-14 05:14:22,011 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:22,011 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:22,011 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:22,011 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:22,011 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:22,204 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:22,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '40567#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:22,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:22,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:22,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 34 [2024-11-14 05:14:22,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95444143] [2024-11-14 05:14:22,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:22,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-11-14 05:14:22,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:22,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-11-14 05:14:22,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=547, Invalid=1345, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 05:14:22,592 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand has 35 states, 35 states have (on average 5.571428571428571) internal successors, (195), 34 states have internal predecessors, (195), 0 states have call successors, (0), 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 05:14:23,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:23,180 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2024-11-14 05:14:23,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 05:14:23,181 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.571428571428571) internal successors, (195), 34 states have internal predecessors, (195), 0 states have call successors, (0), 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 174 [2024-11-14 05:14:23,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:23,182 INFO L225 Difference]: With dead ends: 192 [2024-11-14 05:14:23,182 INFO L226 Difference]: Without dead ends: 190 [2024-11-14 05:14:23,182 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 480 SyntacticMatches, 56 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2434 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1533, Invalid=3723, Unknown=0, NotChecked=0, Total=5256 [2024-11-14 05:14:23,183 INFO L432 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:23,183 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 277 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:14:23,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-14 05:14:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 183. [2024-11-14 05:14:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 0 states have call successors, (0), 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 05:14:23,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2024-11-14 05:14:23,200 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 174 [2024-11-14 05:14:23,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:23,200 INFO L471 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2024-11-14 05:14:23,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.571428571428571) internal successors, (195), 34 states have internal predecessors, (195), 0 states have call successors, (0), 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 05:14:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2024-11-14 05:14:23,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-11-14 05:14:23,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:23,202 INFO L215 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:23,228 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-11-14 05:14:23,402 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:23,402 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:23,403 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:23,403 INFO L85 PathProgramCache]: Analyzing trace with hash -466849822, now seen corresponding path program 40 times [2024-11-14 05:14:23,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408525153] [2024-11-14 05:14:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1598 proven. 896 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:25,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:25,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408525153] [2024-11-14 05:14:25,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408525153] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:25,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652150765] [2024-11-14 05:14:25,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:14:25,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:25,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:25,409 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:25,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-11-14 05:14:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:25,686 INFO L255 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 05:14:25,688 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:27,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1680 proven. 812 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:27,545 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2494 backedges. 1680 proven. 812 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:28,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652150765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:28,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1058242248] [2024-11-14 05:14:28,969 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:28,969 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:28,969 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:28,969 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:28,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:29,097 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:29,867 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '42308#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:29,867 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:29,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:29,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 92 [2024-11-14 05:14:29,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72429561] [2024-11-14 05:14:29,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:29,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-11-14 05:14:29,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:29,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-11-14 05:14:29,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1980, Invalid=8120, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 05:14:29,870 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand has 92 states, 92 states have (on average 3.3260869565217392) internal successors, (306), 92 states have internal predecessors, (306), 0 states have call successors, (0), 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 05:14:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:31,197 INFO L93 Difference]: Finished difference Result 393 states and 425 transitions. [2024-11-14 05:14:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-11-14 05:14:31,197 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.3260869565217392) internal successors, (306), 92 states have internal predecessors, (306), 0 states have call successors, (0), 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 182 [2024-11-14 05:14:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:31,198 INFO L225 Difference]: With dead ends: 393 [2024-11-14 05:14:31,199 INFO L226 Difference]: Without dead ends: 272 [2024-11-14 05:14:31,200 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 449 SyntacticMatches, 57 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6566 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3722, Invalid=13048, Unknown=0, NotChecked=0, Total=16770 [2024-11-14 05:14:31,200 INFO L432 NwaCegarLoop]: 60 mSDtfsCounter, 249 mSDsluCounter, 527 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:31,201 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 587 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:14:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2024-11-14 05:14:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 185. [2024-11-14 05:14:31,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.016304347826087) internal successors, (187), 184 states have internal predecessors, (187), 0 states have call successors, (0), 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 05:14:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2024-11-14 05:14:31,215 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 182 [2024-11-14 05:14:31,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:31,215 INFO L471 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2024-11-14 05:14:31,216 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.3260869565217392) internal successors, (306), 92 states have internal predecessors, (306), 0 states have call successors, (0), 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 05:14:31,216 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2024-11-14 05:14:31,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2024-11-14 05:14:31,217 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:31,217 INFO L215 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:31,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-11-14 05:14:31,417 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:31,418 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:31,418 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:31,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1603221689, now seen corresponding path program 41 times [2024-11-14 05:14:31,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:31,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509869474] [2024-11-14 05:14:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:31,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1598 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:33,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509869474] [2024-11-14 05:14:33,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509869474] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:33,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259648305] [2024-11-14 05:14:33,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:14:33,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:33,587 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:33,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-11-14 05:14:33,937 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2024-11-14 05:14:33,938 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:33,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 05:14:33,944 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:35,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1682 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:35,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:37,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 1682 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:37,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259648305] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:37,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1433874318] [2024-11-14 05:14:37,450 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:37,450 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:37,450 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:37,450 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:37,450 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:37,588 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:38,297 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '44326#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:38,297 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:38,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:38,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 94 [2024-11-14 05:14:38,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807709699] [2024-11-14 05:14:38,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:38,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2024-11-14 05:14:38,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2024-11-14 05:14:38,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2075, Invalid=8431, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 05:14:38,299 INFO L87 Difference]: Start difference. First operand 185 states and 187 transitions. Second operand has 94 states, 94 states have (on average 3.276595744680851) internal successors, (308), 94 states have internal predecessors, (308), 0 states have call successors, (0), 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 05:14:39,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:39,687 INFO L93 Difference]: Finished difference Result 400 states and 433 transitions. [2024-11-14 05:14:39,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-11-14 05:14:39,687 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 3.276595744680851) internal successors, (308), 94 states have internal predecessors, (308), 0 states have call successors, (0), 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 184 [2024-11-14 05:14:39,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:39,688 INFO L225 Difference]: With dead ends: 400 [2024-11-14 05:14:39,688 INFO L226 Difference]: Without dead ends: 277 [2024-11-14 05:14:39,689 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 452 SyntacticMatches, 59 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6843 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=3937, Invalid=13619, Unknown=0, NotChecked=0, Total=17556 [2024-11-14 05:14:39,690 INFO L432 NwaCegarLoop]: 62 mSDtfsCounter, 271 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 636 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:39,690 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 636 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:14:39,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2024-11-14 05:14:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 187. [2024-11-14 05:14:39,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0161290322580645) internal successors, (189), 186 states have internal predecessors, (189), 0 states have call successors, (0), 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 05:14:39,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2024-11-14 05:14:39,701 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 184 [2024-11-14 05:14:39,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:39,701 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2024-11-14 05:14:39,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 3.276595744680851) internal successors, (308), 94 states have internal predecessors, (308), 0 states have call successors, (0), 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 05:14:39,701 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2024-11-14 05:14:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2024-11-14 05:14:39,702 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:39,702 INFO L215 NwaCegarLoop]: trace histogram [31, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:39,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-11-14 05:14:39,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:39,903 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:39,903 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:39,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1560074604, now seen corresponding path program 42 times [2024-11-14 05:14:39,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:39,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044513582] [2024-11-14 05:14:39,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:39,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:41,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 870 proven. 1742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:41,311 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044513582] [2024-11-14 05:14:41,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044513582] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:41,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173469861] [2024-11-14 05:14:41,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:14:41,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:41,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:41,313 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:41,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-11-14 05:14:41,619 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:14:41,620 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:41,625 INFO L255 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-11-14 05:14:41,629 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:41,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:41,951 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2612 backedges. 930 proven. 1682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173469861] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:43,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1857494825] [2024-11-14 05:14:43,013 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:43,013 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:43,013 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:43,013 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:43,013 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:43,157 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:43,547 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46313#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:43,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:43,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:43,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 36 [2024-11-14 05:14:43,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380526274] [2024-11-14 05:14:43,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:43,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 05:14:43,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 05:14:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 05:14:43,549 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand has 37 states, 37 states have (on average 5.594594594594595) internal successors, (207), 36 states have internal predecessors, (207), 0 states have call successors, (0), 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 05:14:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:44,208 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2024-11-14 05:14:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 05:14:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.594594594594595) internal successors, (207), 36 states have internal predecessors, (207), 0 states have call successors, (0), 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 186 [2024-11-14 05:14:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:44,210 INFO L225 Difference]: With dead ends: 204 [2024-11-14 05:14:44,210 INFO L226 Difference]: Without dead ends: 202 [2024-11-14 05:14:44,211 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 649 GetRequests, 513 SyntacticMatches, 61 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2754 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1728, Invalid=4124, Unknown=0, NotChecked=0, Total=5852 [2024-11-14 05:14:44,212 INFO L432 NwaCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:44,212 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 275 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:14:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-11-14 05:14:44,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2024-11-14 05:14:44,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0154639175257731) internal successors, (197), 194 states have internal predecessors, (197), 0 states have call successors, (0), 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 05:14:44,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2024-11-14 05:14:44,232 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 186 [2024-11-14 05:14:44,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:44,232 INFO L471 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2024-11-14 05:14:44,232 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.594594594594595) internal successors, (207), 36 states have internal predecessors, (207), 0 states have call successors, (0), 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 05:14:44,232 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2024-11-14 05:14:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2024-11-14 05:14:44,233 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:44,234 INFO L215 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:44,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-11-14 05:14:44,437 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-11-14 05:14:44,437 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:44,438 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:44,438 INFO L85 PathProgramCache]: Analyzing trace with hash -31552046, now seen corresponding path program 43 times [2024-11-14 05:14:44,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:44,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090023169] [2024-11-14 05:14:44,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:44,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:44,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:46,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1832 proven. 1020 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:46,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:46,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090023169] [2024-11-14 05:14:46,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090023169] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:46,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016423808] [2024-11-14 05:14:46,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:14:46,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:46,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:46,692 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:46,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-11-14 05:14:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:47,015 INFO L255 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-14 05:14:47,018 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1920 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:49,277 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:14:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 1920 proven. 930 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:14:50,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016423808] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:14:50,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [343689215] [2024-11-14 05:14:50,976 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:14:50,976 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:14:50,976 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:14:50,976 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:14:50,976 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:14:51,129 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:14:51,863 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48168#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:14:51,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:14:51,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:14:51,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 64] total 98 [2024-11-14 05:14:51,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003744502] [2024-11-14 05:14:51,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:14:51,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2024-11-14 05:14:51,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:14:51,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2024-11-14 05:14:51,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2238, Invalid=9104, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 05:14:51,866 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand has 98 states, 98 states have (on average 3.326530612244898) internal successors, (326), 98 states have internal predecessors, (326), 0 states have call successors, (0), 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 05:14:53,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:14:53,495 INFO L93 Difference]: Finished difference Result 419 states and 453 transitions. [2024-11-14 05:14:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-14 05:14:53,495 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.326530612244898) internal successors, (326), 98 states have internal predecessors, (326), 0 states have call successors, (0), 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 194 [2024-11-14 05:14:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:14:53,496 INFO L225 Difference]: With dead ends: 419 [2024-11-14 05:14:53,496 INFO L226 Difference]: Without dead ends: 290 [2024-11-14 05:14:53,497 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 676 GetRequests, 479 SyntacticMatches, 61 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7390 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4224, Invalid=14682, Unknown=0, NotChecked=0, Total=18906 [2024-11-14 05:14:53,498 INFO L432 NwaCegarLoop]: 64 mSDtfsCounter, 306 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 704 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:14:53,498 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 704 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:14:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2024-11-14 05:14:53,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 197. [2024-11-14 05:14:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0153061224489797) internal successors, (199), 196 states have internal predecessors, (199), 0 states have call successors, (0), 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 05:14:53,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 199 transitions. [2024-11-14 05:14:53,519 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 199 transitions. Word has length 194 [2024-11-14 05:14:53,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:14:53,520 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 199 transitions. [2024-11-14 05:14:53,520 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.326530612244898) internal successors, (326), 98 states have internal predecessors, (326), 0 states have call successors, (0), 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 05:14:53,520 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 199 transitions. [2024-11-14 05:14:53,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2024-11-14 05:14:53,521 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:14:53,521 INFO L215 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:14:53,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-11-14 05:14:53,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2024-11-14 05:14:53,722 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:14:53,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:14:53,722 INFO L85 PathProgramCache]: Analyzing trace with hash 357168567, now seen corresponding path program 44 times [2024-11-14 05:14:53,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:14:53,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455602790] [2024-11-14 05:14:53,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:14:53,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:14:53,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:14:56,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 1832 proven. 1082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:56,102 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:14:56,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455602790] [2024-11-14 05:14:56,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455602790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:14:56,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401288335] [2024-11-14 05:14:56,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:14:56,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:14:56,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:14:56,104 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:14:56,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-11-14 05:14:56,514 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2024-11-14 05:14:56,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:14:56,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-11-14 05:14:56,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:14:58,820 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 1922 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:14:58,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:00,687 INFO L134 CoverageAnalysis]: Checked inductivity of 2914 backedges. 1922 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:00,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401288335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [297761536] [2024-11-14 05:15:00,689 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:00,689 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:00,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:00,689 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:00,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:00,841 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:01,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '50318#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:01,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:01,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:01,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 100 [2024-11-14 05:15:01,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286173069] [2024-11-14 05:15:01,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:01,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2024-11-14 05:15:01,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:01,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2024-11-14 05:15:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2339, Invalid=9433, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 05:15:01,626 INFO L87 Difference]: Start difference. First operand 197 states and 199 transitions. Second operand has 100 states, 100 states have (on average 3.28) internal successors, (328), 100 states have internal predecessors, (328), 0 states have call successors, (0), 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 05:15:03,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:03,303 INFO L93 Difference]: Finished difference Result 426 states and 461 transitions. [2024-11-14 05:15:03,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-11-14 05:15:03,303 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 3.28) internal successors, (328), 100 states have internal predecessors, (328), 0 states have call successors, (0), 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 196 [2024-11-14 05:15:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:03,304 INFO L225 Difference]: With dead ends: 426 [2024-11-14 05:15:03,304 INFO L226 Difference]: Without dead ends: 295 [2024-11-14 05:15:03,305 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 482 SyntacticMatches, 63 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7683 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=4453, Invalid=15287, Unknown=0, NotChecked=0, Total=19740 [2024-11-14 05:15:03,306 INFO L432 NwaCegarLoop]: 66 mSDtfsCounter, 231 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:03,306 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 882 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:15:03,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-11-14 05:15:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 199. [2024-11-14 05:15:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0151515151515151) internal successors, (201), 198 states have internal predecessors, (201), 0 states have call successors, (0), 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 05:15:03,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2024-11-14 05:15:03,318 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 196 [2024-11-14 05:15:03,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:03,318 INFO L471 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2024-11-14 05:15:03,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 3.28) internal successors, (328), 100 states have internal predecessors, (328), 0 states have call successors, (0), 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 05:15:03,318 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2024-11-14 05:15:03,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-11-14 05:15:03,319 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:03,319 INFO L215 NwaCegarLoop]: trace histogram [33, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:03,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-11-14 05:15:03,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:03,520 INFO L396 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:03,520 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:03,520 INFO L85 PathProgramCache]: Analyzing trace with hash 255522908, now seen corresponding path program 45 times [2024-11-14 05:15:03,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:03,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145588598] [2024-11-14 05:15:03,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:03,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:03,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:04,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 992 proven. 1986 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:04,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:04,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145588598] [2024-11-14 05:15:04,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145588598] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:04,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328602094] [2024-11-14 05:15:04,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:15:04,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:04,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:04,898 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:04,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-11-14 05:15:05,247 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:15:05,247 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:15:05,252 INFO L255 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-11-14 05:15:05,254 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:05,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:05,525 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:06,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2978 backedges. 1056 proven. 1922 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:06,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328602094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:06,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1176526353] [2024-11-14 05:15:06,717 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:06,717 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:06,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:06,717 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:06,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:06,858 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:07,284 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '52433#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:07,284 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:07,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 38 [2024-11-14 05:15:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614081095] [2024-11-14 05:15:07,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:07,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 05:15:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 05:15:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=681, Invalid=1575, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 05:15:07,285 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand has 39 states, 39 states have (on average 5.615384615384615) internal successors, (219), 38 states have internal predecessors, (219), 0 states have call successors, (0), 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 05:15:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:08,012 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2024-11-14 05:15:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 05:15:08,013 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.615384615384615) internal successors, (219), 38 states have internal predecessors, (219), 0 states have call successors, (0), 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 198 [2024-11-14 05:15:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:08,014 INFO L225 Difference]: With dead ends: 216 [2024-11-14 05:15:08,014 INFO L226 Difference]: Without dead ends: 214 [2024-11-14 05:15:08,014 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 547 SyntacticMatches, 65 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3062 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1935, Invalid=4545, Unknown=0, NotChecked=0, Total=6480 [2024-11-14 05:15:08,015 INFO L432 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 327 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:08,015 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 278 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 327 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:15:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-11-14 05:15:08,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 207. [2024-11-14 05:15:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0145631067961165) internal successors, (209), 206 states have internal predecessors, (209), 0 states have call successors, (0), 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 05:15:08,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2024-11-14 05:15:08,030 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 198 [2024-11-14 05:15:08,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:08,030 INFO L471 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2024-11-14 05:15:08,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.615384615384615) internal successors, (219), 38 states have internal predecessors, (219), 0 states have call successors, (0), 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 05:15:08,031 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2024-11-14 05:15:08,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-11-14 05:15:08,032 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:08,032 INFO L215 NwaCegarLoop]: trace histogram [34, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:08,052 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-11-14 05:15:08,232 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-11-14 05:15:08,232 INFO L396 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:08,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:08,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1752777534, now seen corresponding path program 46 times [2024-11-14 05:15:08,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:08,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331437812] [2024-11-14 05:15:08,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:08,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:10,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2082 proven. 1152 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:10,993 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331437812] [2024-11-14 05:15:10,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331437812] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:10,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533110882] [2024-11-14 05:15:10,994 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:15:10,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:10,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:10,996 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:10,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-11-14 05:15:11,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:11,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 759 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 05:15:11,353 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2176 proven. 1056 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:15:13,684 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:15,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3234 backedges. 2176 proven. 1056 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:15:15,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533110882] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:15,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1651004174] [2024-11-14 05:15:15,641 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:15,641 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:15,641 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:15,641 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:15,641 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:15,810 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:16,570 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '54402#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:16,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:16,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:16,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 68] total 104 [2024-11-14 05:15:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562753727] [2024-11-14 05:15:16,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:16,571 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2024-11-14 05:15:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2024-11-14 05:15:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2512, Invalid=10144, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 05:15:16,572 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand has 104 states, 104 states have (on average 3.326923076923077) internal successors, (346), 104 states have internal predecessors, (346), 0 states have call successors, (0), 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 05:15:18,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:18,250 INFO L93 Difference]: Finished difference Result 445 states and 481 transitions. [2024-11-14 05:15:18,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-11-14 05:15:18,250 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 3.326923076923077) internal successors, (346), 104 states have internal predecessors, (346), 0 states have call successors, (0), 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 206 [2024-11-14 05:15:18,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:18,251 INFO L225 Difference]: With dead ends: 445 [2024-11-14 05:15:18,251 INFO L226 Difference]: Without dead ends: 308 [2024-11-14 05:15:18,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 718 GetRequests, 509 SyntacticMatches, 65 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8262 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4758, Invalid=16412, Unknown=0, NotChecked=0, Total=21170 [2024-11-14 05:15:18,253 INFO L432 NwaCegarLoop]: 68 mSDtfsCounter, 271 mSDsluCounter, 771 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:18,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 839 Invalid, 1004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:15:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2024-11-14 05:15:18,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 209. [2024-11-14 05:15:18,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0144230769230769) internal successors, (211), 208 states have internal predecessors, (211), 0 states have call successors, (0), 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 05:15:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 211 transitions. [2024-11-14 05:15:18,272 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 211 transitions. Word has length 206 [2024-11-14 05:15:18,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:18,272 INFO L471 AbstractCegarLoop]: Abstraction has 209 states and 211 transitions. [2024-11-14 05:15:18,272 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 3.326923076923077) internal successors, (346), 104 states have internal predecessors, (346), 0 states have call successors, (0), 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 05:15:18,272 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 211 transitions. [2024-11-14 05:15:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2024-11-14 05:15:18,273 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:18,273 INFO L215 NwaCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:18,289 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-11-14 05:15:18,475 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:18,475 INFO L396 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:18,476 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:18,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1493464359, now seen corresponding path program 47 times [2024-11-14 05:15:18,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:18,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636950663] [2024-11-14 05:15:18,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:18,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:21,016 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2082 proven. 1218 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:21,016 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:21,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636950663] [2024-11-14 05:15:21,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636950663] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:21,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389854188] [2024-11-14 05:15:21,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:15:21,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:21,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:21,019 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:21,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-11-14 05:15:21,409 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2024-11-14 05:15:21,409 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:15:21,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 05:15:21,417 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:23,861 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3300 backedges. 2178 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:25,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389854188] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:25,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030409903] [2024-11-14 05:15:25,643 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:25,643 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:25,644 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:25,644 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:25,644 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:25,800 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:26,545 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '56684#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:26,545 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:26,545 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:26,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 106 [2024-11-14 05:15:26,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465263386] [2024-11-14 05:15:26,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:26,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-11-14 05:15:26,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:26,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-11-14 05:15:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2619, Invalid=10491, Unknown=0, NotChecked=0, Total=13110 [2024-11-14 05:15:26,548 INFO L87 Difference]: Start difference. First operand 209 states and 211 transitions. Second operand has 106 states, 106 states have (on average 3.2830188679245285) internal successors, (348), 106 states have internal predecessors, (348), 0 states have call successors, (0), 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 05:15:28,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:28,202 INFO L93 Difference]: Finished difference Result 452 states and 489 transitions. [2024-11-14 05:15:28,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 05:15:28,202 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 3.2830188679245285) internal successors, (348), 106 states have internal predecessors, (348), 0 states have call successors, (0), 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 208 [2024-11-14 05:15:28,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:28,203 INFO L225 Difference]: With dead ends: 452 [2024-11-14 05:15:28,203 INFO L226 Difference]: Without dead ends: 313 [2024-11-14 05:15:28,204 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 726 GetRequests, 512 SyntacticMatches, 67 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8571 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=5001, Invalid=17051, Unknown=0, NotChecked=0, Total=22052 [2024-11-14 05:15:28,205 INFO L432 NwaCegarLoop]: 70 mSDtfsCounter, 347 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 792 SdHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:28,205 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [347 Valid, 792 Invalid, 1001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:15:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-11-14 05:15:28,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 211. [2024-11-14 05:15:28,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0142857142857142) internal successors, (213), 210 states have internal predecessors, (213), 0 states have call successors, (0), 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 05:15:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2024-11-14 05:15:28,221 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 208 [2024-11-14 05:15:28,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:28,221 INFO L471 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2024-11-14 05:15:28,221 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 3.2830188679245285) internal successors, (348), 106 states have internal predecessors, (348), 0 states have call successors, (0), 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 05:15:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2024-11-14 05:15:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2024-11-14 05:15:28,222 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:28,222 INFO L215 NwaCegarLoop]: trace histogram [35, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:28,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-11-14 05:15:28,422 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-11-14 05:15:28,423 INFO L396 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:28,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:28,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1309300660, now seen corresponding path program 48 times [2024-11-14 05:15:28,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:28,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570729178] [2024-11-14 05:15:28,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:28,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:30,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1122 proven. 2246 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:30,232 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:30,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570729178] [2024-11-14 05:15:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570729178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:30,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658210795] [2024-11-14 05:15:30,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:15:30,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:30,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:30,234 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:30,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-11-14 05:15:30,645 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:15:30,645 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:15:30,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 05:15:30,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:31,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3368 backedges. 1190 proven. 2178 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:32,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658210795] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:32,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [179724462] [2024-11-14 05:15:32,350 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:32,351 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:32,351 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:32,351 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:32,351 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:32,482 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:32,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58927#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:32,864 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:32,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:32,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 40 [2024-11-14 05:15:32,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864291617] [2024-11-14 05:15:32,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:32,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 05:15:32,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:32,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 05:15:32,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=1696, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 05:15:32,866 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand has 41 states, 41 states have (on average 5.634146341463414) internal successors, (231), 40 states have internal predecessors, (231), 0 states have call successors, (0), 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 05:15:33,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:33,620 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2024-11-14 05:15:33,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-14 05:15:33,620 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.634146341463414) internal successors, (231), 40 states have internal predecessors, (231), 0 states have call successors, (0), 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 210 [2024-11-14 05:15:33,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:33,622 INFO L225 Difference]: With dead ends: 228 [2024-11-14 05:15:33,622 INFO L226 Difference]: Without dead ends: 226 [2024-11-14 05:15:33,623 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 733 GetRequests, 582 SyntacticMatches, 68 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3352 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2154, Invalid=4986, Unknown=0, NotChecked=0, Total=7140 [2024-11-14 05:15:33,624 INFO L432 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:33,624 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 275 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:15:33,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-11-14 05:15:33,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2024-11-14 05:15:33,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0137614678899083) internal successors, (221), 218 states have internal predecessors, (221), 0 states have call successors, (0), 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 05:15:33,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2024-11-14 05:15:33,647 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 210 [2024-11-14 05:15:33,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:33,647 INFO L471 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2024-11-14 05:15:33,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.634146341463414) internal successors, (231), 40 states have internal predecessors, (231), 0 states have call successors, (0), 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 05:15:33,647 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2024-11-14 05:15:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2024-11-14 05:15:33,649 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:33,649 INFO L215 NwaCegarLoop]: trace histogram [36, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:33,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-11-14 05:15:33,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:33,850 INFO L396 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:33,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:33,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1471513422, now seen corresponding path program 49 times [2024-11-14 05:15:33,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:33,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004002341] [2024-11-14 05:15:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:33,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2348 proven. 1292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:36,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:36,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004002341] [2024-11-14 05:15:36,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004002341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:36,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669445792] [2024-11-14 05:15:36,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:15:36,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:36,896 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:36,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-11-14 05:15:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:37,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 803 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 05:15:37,280 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2448 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:15:40,050 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:42,018 INFO L134 CoverageAnalysis]: Checked inductivity of 3640 backedges. 2448 proven. 1190 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:15:42,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669445792] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:42,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [561627678] [2024-11-14 05:15:42,019 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:42,019 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:42,019 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:42,020 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:42,020 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:42,168 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:42,999 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '61010#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:42,999 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:42,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:43,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 72] total 110 [2024-11-14 05:15:43,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524014678] [2024-11-14 05:15:43,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:43,000 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2024-11-14 05:15:43,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:43,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2024-11-14 05:15:43,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2802, Invalid=11240, Unknown=0, NotChecked=0, Total=14042 [2024-11-14 05:15:43,003 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand has 110 states, 110 states have (on average 3.327272727272727) internal successors, (366), 110 states have internal predecessors, (366), 0 states have call successors, (0), 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 05:15:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:44,872 INFO L93 Difference]: Finished difference Result 471 states and 509 transitions. [2024-11-14 05:15:44,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-11-14 05:15:44,872 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 3.327272727272727) internal successors, (366), 110 states have internal predecessors, (366), 0 states have call successors, (0), 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 218 [2024-11-14 05:15:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:44,874 INFO L225 Difference]: With dead ends: 471 [2024-11-14 05:15:44,874 INFO L226 Difference]: Without dead ends: 326 [2024-11-14 05:15:44,875 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 539 SyntacticMatches, 69 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9182 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5324, Invalid=18238, Unknown=0, NotChecked=0, Total=23562 [2024-11-14 05:15:44,876 INFO L432 NwaCegarLoop]: 72 mSDtfsCounter, 360 mSDsluCounter, 674 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:44,876 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 746 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:15:44,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2024-11-14 05:15:44,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 221. [2024-11-14 05:15:44,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0136363636363637) internal successors, (223), 220 states have internal predecessors, (223), 0 states have call successors, (0), 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 05:15:44,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 223 transitions. [2024-11-14 05:15:44,889 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 223 transitions. Word has length 218 [2024-11-14 05:15:44,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:44,889 INFO L471 AbstractCegarLoop]: Abstraction has 221 states and 223 transitions. [2024-11-14 05:15:44,889 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 3.327272727272727) internal successors, (366), 110 states have internal predecessors, (366), 0 states have call successors, (0), 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 05:15:44,890 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 223 transitions. [2024-11-14 05:15:44,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2024-11-14 05:15:44,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:44,890 INFO L215 NwaCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:44,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-11-14 05:15:45,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:45,091 INFO L396 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:45,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:45,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1554367895, now seen corresponding path program 50 times [2024-11-14 05:15:45,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:45,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327014787] [2024-11-14 05:15:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:45,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 2348 proven. 1362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:48,113 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327014787] [2024-11-14 05:15:48,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327014787] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:48,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799790206] [2024-11-14 05:15:48,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:15:48,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:48,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:48,115 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:48,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-11-14 05:15:48,558 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2024-11-14 05:15:48,558 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:15:48,563 INFO L255 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-11-14 05:15:48,567 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 2450 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:51,336 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3710 backedges. 2450 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:53,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799790206] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:53,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [379429980] [2024-11-14 05:15:53,323 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:53,323 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:53,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:53,323 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:53,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:15:53,441 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:15:54,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '63424#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:15:54,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:15:54,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:15:54,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74, 74] total 112 [2024-11-14 05:15:54,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094573819] [2024-11-14 05:15:54,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:15:54,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2024-11-14 05:15:54,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:15:54,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2024-11-14 05:15:54,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2915, Invalid=11605, Unknown=0, NotChecked=0, Total=14520 [2024-11-14 05:15:54,187 INFO L87 Difference]: Start difference. First operand 221 states and 223 transitions. Second operand has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 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 05:15:55,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:15:55,988 INFO L93 Difference]: Finished difference Result 478 states and 517 transitions. [2024-11-14 05:15:55,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2024-11-14 05:15:55,988 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 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 220 [2024-11-14 05:15:55,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:15:55,989 INFO L225 Difference]: With dead ends: 478 [2024-11-14 05:15:55,989 INFO L226 Difference]: Without dead ends: 331 [2024-11-14 05:15:55,990 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 768 GetRequests, 542 SyntacticMatches, 71 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9507 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=5581, Invalid=18911, Unknown=0, NotChecked=0, Total=24492 [2024-11-14 05:15:55,991 INFO L432 NwaCegarLoop]: 74 mSDtfsCounter, 413 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:15:55,991 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 720 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:15:55,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2024-11-14 05:15:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 223. [2024-11-14 05:15:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0135135135135136) internal successors, (225), 222 states have internal predecessors, (225), 0 states have call successors, (0), 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 05:15:56,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2024-11-14 05:15:56,014 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 220 [2024-11-14 05:15:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:15:56,014 INFO L471 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2024-11-14 05:15:56,014 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 3.2857142857142856) internal successors, (368), 112 states have internal predecessors, (368), 0 states have call successors, (0), 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 05:15:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2024-11-14 05:15:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2024-11-14 05:15:56,015 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:15:56,015 INFO L215 NwaCegarLoop]: trace histogram [37, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:15:56,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-11-14 05:15:56,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2024-11-14 05:15:56,216 INFO L396 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:15:56,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:15:56,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1733454140, now seen corresponding path program 51 times [2024-11-14 05:15:56,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:15:56,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093362863] [2024-11-14 05:15:56,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:15:56,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:15:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:15:57,796 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1260 proven. 2522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:57,797 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:15:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093362863] [2024-11-14 05:15:57,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093362863] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:15:57,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305350121] [2024-11-14 05:15:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:15:57,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:15:57,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:15:57,799 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:15:57,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-11-14 05:15:58,155 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:15:58,155 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:15:58,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-11-14 05:15:58,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:15:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:58,517 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:15:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 3782 backedges. 1332 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:15:59,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305350121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:15:59,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1698712060] [2024-11-14 05:15:59,885 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:15:59,885 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:15:59,885 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:15:59,885 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:15:59,885 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:00,034 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:00,441 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '65795#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:16:00,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:00,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:00,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 42 [2024-11-14 05:16:00,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091545755] [2024-11-14 05:16:00,441 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:00,442 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 05:16:00,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:00,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 05:16:00,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=831, Invalid=1821, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 05:16:00,443 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand has 43 states, 43 states have (on average 5.651162790697675) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 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 05:16:01,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:01,305 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2024-11-14 05:16:01,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-14 05:16:01,306 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.651162790697675) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 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 222 [2024-11-14 05:16:01,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:01,307 INFO L225 Difference]: With dead ends: 240 [2024-11-14 05:16:01,307 INFO L226 Difference]: Without dead ends: 238 [2024-11-14 05:16:01,307 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 615 SyntacticMatches, 73 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3726 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2385, Invalid=5447, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 05:16:01,308 INFO L432 NwaCegarLoop]: 45 mSDtfsCounter, 12 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:01,308 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 278 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:16:01,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2024-11-14 05:16:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 231. [2024-11-14 05:16:01,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0130434782608695) internal successors, (233), 230 states have internal predecessors, (233), 0 states have call successors, (0), 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 05:16:01,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2024-11-14 05:16:01,325 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 222 [2024-11-14 05:16:01,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:01,325 INFO L471 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2024-11-14 05:16:01,325 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.651162790697675) internal successors, (243), 42 states have internal predecessors, (243), 0 states have call successors, (0), 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 05:16:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2024-11-14 05:16:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2024-11-14 05:16:01,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:01,326 INFO L215 NwaCegarLoop]: trace histogram [38, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:01,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-11-14 05:16:01,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:01,527 INFO L396 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:16:01,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:01,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1794159198, now seen corresponding path program 52 times [2024-11-14 05:16:01,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:01,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315278032] [2024-11-14 05:16:01,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:01,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2630 proven. 1440 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:04,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315278032] [2024-11-14 05:16:04,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315278032] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:04,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662638031] [2024-11-14 05:16:04,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:16:04,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:04,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:04,479 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:04,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-11-14 05:16:04,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:04,850 INFO L255 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-11-14 05:16:04,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:07,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2736 proven. 1332 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:16:07,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:10,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4070 backedges. 2736 proven. 1332 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:16:10,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662638031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:10,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1109760226] [2024-11-14 05:16:10,080 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:10,080 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:10,080 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:10,080 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:10,080 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:10,214 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:11,024 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '67992#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:16:11,024 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:11,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:11,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 76, 76] total 116 [2024-11-14 05:16:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150938499] [2024-11-14 05:16:11,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:11,025 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-11-14 05:16:11,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-11-14 05:16:11,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3108, Invalid=12392, Unknown=0, NotChecked=0, Total=15500 [2024-11-14 05:16:11,027 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand has 116 states, 116 states have (on average 3.3275862068965516) internal successors, (386), 116 states have internal predecessors, (386), 0 states have call successors, (0), 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 05:16:13,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:13,072 INFO L93 Difference]: Finished difference Result 497 states and 537 transitions. [2024-11-14 05:16:13,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2024-11-14 05:16:13,073 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.3275862068965516) internal successors, (386), 116 states have internal predecessors, (386), 0 states have call successors, (0), 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 230 [2024-11-14 05:16:13,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:13,074 INFO L225 Difference]: With dead ends: 497 [2024-11-14 05:16:13,074 INFO L226 Difference]: Without dead ends: 344 [2024-11-14 05:16:13,074 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 802 GetRequests, 569 SyntacticMatches, 73 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10150 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=5922, Invalid=20160, Unknown=0, NotChecked=0, Total=26082 [2024-11-14 05:16:13,075 INFO L432 NwaCegarLoop]: 76 mSDtfsCounter, 338 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 1031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:13,075 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [338 Valid, 840 Invalid, 1031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 880 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:16:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2024-11-14 05:16:13,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 233. [2024-11-14 05:16:13,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0129310344827587) internal successors, (235), 232 states have internal predecessors, (235), 0 states have call successors, (0), 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 05:16:13,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 235 transitions. [2024-11-14 05:16:13,097 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 235 transitions. Word has length 230 [2024-11-14 05:16:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:13,097 INFO L471 AbstractCegarLoop]: Abstraction has 233 states and 235 transitions. [2024-11-14 05:16:13,097 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.3275862068965516) internal successors, (386), 116 states have internal predecessors, (386), 0 states have call successors, (0), 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 05:16:13,098 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 235 transitions. [2024-11-14 05:16:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2024-11-14 05:16:13,099 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:13,099 INFO L215 NwaCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:13,121 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2024-11-14 05:16:13,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2024-11-14 05:16:13,299 INFO L396 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:16:13,300 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:13,300 INFO L85 PathProgramCache]: Analyzing trace with hash -839686393, now seen corresponding path program 53 times [2024-11-14 05:16:13,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:13,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180622911] [2024-11-14 05:16:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:13,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:13,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:16,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2630 proven. 1514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:16,275 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180622911] [2024-11-14 05:16:16,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180622911] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:16,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753505427] [2024-11-14 05:16:16,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:16:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:16,277 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:16,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-11-14 05:16:16,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2024-11-14 05:16:16,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:16,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 05:16:16,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:19,582 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:19,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 2738 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:21,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753505427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:21,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132690210] [2024-11-14 05:16:21,736 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:21,736 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:21,736 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:21,736 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:21,737 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:21,862 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:22,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '70538#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:16:22,801 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:22,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:22,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 118 [2024-11-14 05:16:22,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776969952] [2024-11-14 05:16:22,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:22,803 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2024-11-14 05:16:22,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:22,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2024-11-14 05:16:22,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3227, Invalid=12775, Unknown=0, NotChecked=0, Total=16002 [2024-11-14 05:16:22,805 INFO L87 Difference]: Start difference. First operand 233 states and 235 transitions. Second operand has 118 states, 118 states have (on average 3.288135593220339) internal successors, (388), 118 states have internal predecessors, (388), 0 states have call successors, (0), 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 05:16:24,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:24,816 INFO L93 Difference]: Finished difference Result 504 states and 545 transitions. [2024-11-14 05:16:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-11-14 05:16:24,816 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 3.288135593220339) internal successors, (388), 118 states have internal predecessors, (388), 0 states have call successors, (0), 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 232 [2024-11-14 05:16:24,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:24,818 INFO L225 Difference]: With dead ends: 504 [2024-11-14 05:16:24,818 INFO L226 Difference]: Without dead ends: 349 [2024-11-14 05:16:24,819 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 572 SyntacticMatches, 75 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10491 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6193, Invalid=20867, Unknown=0, NotChecked=0, Total=27060 [2024-11-14 05:16:24,819 INFO L432 NwaCegarLoop]: 78 mSDtfsCounter, 360 mSDsluCounter, 809 mSDsCounter, 0 mSdLazyCounter, 923 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 887 SdHoareTripleChecker+Invalid, 1085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:24,819 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [360 Valid, 887 Invalid, 1085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 923 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-14 05:16:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-11-14 05:16:24,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 235. [2024-11-14 05:16:24,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0128205128205128) internal successors, (237), 234 states have internal predecessors, (237), 0 states have call successors, (0), 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 05:16:24,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2024-11-14 05:16:24,835 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 232 [2024-11-14 05:16:24,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:24,835 INFO L471 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2024-11-14 05:16:24,836 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 3.288135593220339) internal successors, (388), 118 states have internal predecessors, (388), 0 states have call successors, (0), 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 05:16:24,836 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2024-11-14 05:16:24,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2024-11-14 05:16:24,837 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:24,837 INFO L215 NwaCegarLoop]: trace histogram [39, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:24,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-11-14 05:16:25,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:25,038 INFO L396 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:16:25,038 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:25,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1580645164, now seen corresponding path program 54 times [2024-11-14 05:16:25,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:25,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199236188] [2024-11-14 05:16:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:25,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:25,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:26,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1406 proven. 2814 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:26,821 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:26,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199236188] [2024-11-14 05:16:26,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199236188] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:26,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306639749] [2024-11-14 05:16:26,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:16:26,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:26,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:26,823 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:26,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-11-14 05:16:27,209 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:16:27,210 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:27,214 INFO L255 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-14 05:16:27,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:27,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:27,482 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:28,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4220 backedges. 1482 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:28,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306639749] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:28,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [665770696] [2024-11-14 05:16:28,927 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:28,927 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:28,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:28,927 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:28,927 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:29,127 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:29,548 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '73037#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:16:29,548 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:29,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:29,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 44 [2024-11-14 05:16:29,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151183295] [2024-11-14 05:16:29,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:29,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 05:16:29,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 05:16:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=1950, Unknown=0, NotChecked=0, Total=2862 [2024-11-14 05:16:29,551 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand has 45 states, 45 states have (on average 5.666666666666667) internal successors, (255), 44 states have internal predecessors, (255), 0 states have call successors, (0), 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 05:16:30,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:30,413 INFO L93 Difference]: Finished difference Result 252 states and 255 transitions. [2024-11-14 05:16:30,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-14 05:16:30,413 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.666666666666667) internal successors, (255), 44 states have internal predecessors, (255), 0 states have call successors, (0), 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 234 [2024-11-14 05:16:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:30,415 INFO L225 Difference]: With dead ends: 252 [2024-11-14 05:16:30,415 INFO L226 Difference]: Without dead ends: 250 [2024-11-14 05:16:30,415 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 817 GetRequests, 650 SyntacticMatches, 76 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4044 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2628, Invalid=5928, Unknown=0, NotChecked=0, Total=8556 [2024-11-14 05:16:30,416 INFO L432 NwaCegarLoop]: 47 mSDtfsCounter, 12 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:30,416 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 322 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:16:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2024-11-14 05:16:30,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2024-11-14 05:16:30,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.012396694214876) internal successors, (245), 242 states have internal predecessors, (245), 0 states have call successors, (0), 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 05:16:30,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2024-11-14 05:16:30,439 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 234 [2024-11-14 05:16:30,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:30,439 INFO L471 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2024-11-14 05:16:30,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.666666666666667) internal successors, (255), 44 states have internal predecessors, (255), 0 states have call successors, (0), 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 05:16:30,440 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2024-11-14 05:16:30,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2024-11-14 05:16:30,441 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:30,441 INFO L215 NwaCegarLoop]: trace histogram [40, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:30,464 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-11-14 05:16:30,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:30,642 INFO L396 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:16:30,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:30,642 INFO L85 PathProgramCache]: Analyzing trace with hash 255504274, now seen corresponding path program 55 times [2024-11-14 05:16:30,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:30,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883789348] [2024-11-14 05:16:30,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:30,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:30,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:33,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 2928 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:33,946 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:33,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883789348] [2024-11-14 05:16:33,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883789348] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:33,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903594603] [2024-11-14 05:16:33,947 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:16:33,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:33,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:33,948 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:33,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-11-14 05:16:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:34,373 INFO L255 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-11-14 05:16:34,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:37,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3040 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:16:37,478 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4524 backedges. 3040 proven. 1482 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:16:39,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903594603] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1363881238] [2024-11-14 05:16:39,821 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:39,821 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:39,821 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:39,821 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:39,821 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:39,976 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:40,801 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '75348#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:16:40,802 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:40,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:40,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 122 [2024-11-14 05:16:40,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195955317] [2024-11-14 05:16:40,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:40,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-11-14 05:16:40,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:40,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-11-14 05:16:40,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3430, Invalid=13600, Unknown=0, NotChecked=0, Total=17030 [2024-11-14 05:16:40,805 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand has 122 states, 122 states have (on average 3.3278688524590163) internal successors, (406), 122 states have internal predecessors, (406), 0 states have call successors, (0), 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 05:16:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:42,980 INFO L93 Difference]: Finished difference Result 523 states and 565 transitions. [2024-11-14 05:16:42,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-11-14 05:16:42,980 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.3278688524590163) internal successors, (406), 122 states have internal predecessors, (406), 0 states have call successors, (0), 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 242 [2024-11-14 05:16:42,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:42,981 INFO L225 Difference]: With dead ends: 523 [2024-11-14 05:16:42,981 INFO L226 Difference]: Without dead ends: 362 [2024-11-14 05:16:42,983 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 599 SyntacticMatches, 77 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11166 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=6552, Invalid=22178, Unknown=0, NotChecked=0, Total=28730 [2024-11-14 05:16:42,984 INFO L432 NwaCegarLoop]: 80 mSDtfsCounter, 504 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 906 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:42,984 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [504 Valid, 906 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:16:42,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2024-11-14 05:16:43,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 245. [2024-11-14 05:16:43,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0122950819672132) internal successors, (247), 244 states have internal predecessors, (247), 0 states have call successors, (0), 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 05:16:43,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 247 transitions. [2024-11-14 05:16:43,010 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 247 transitions. Word has length 242 [2024-11-14 05:16:43,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:43,011 INFO L471 AbstractCegarLoop]: Abstraction has 245 states and 247 transitions. [2024-11-14 05:16:43,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.3278688524590163) internal successors, (406), 122 states have internal predecessors, (406), 0 states have call successors, (0), 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 05:16:43,011 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 247 transitions. [2024-11-14 05:16:43,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2024-11-14 05:16:43,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:43,012 INFO L215 NwaCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:43,034 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-11-14 05:16:43,216 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:43,216 INFO L396 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:16:43,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:43,217 INFO L85 PathProgramCache]: Analyzing trace with hash -143468169, now seen corresponding path program 56 times [2024-11-14 05:16:43,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:43,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421690089] [2024-11-14 05:16:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:43,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:43,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:46,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 2928 proven. 1674 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:46,639 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:46,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421690089] [2024-11-14 05:16:46,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421690089] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:46,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412604663] [2024-11-14 05:16:46,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:16:46,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:46,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:46,641 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:46,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-11-14 05:16:47,136 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2024-11-14 05:16:47,136 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:47,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-11-14 05:16:47,144 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 3042 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:50,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:16:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4602 backedges. 3042 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:52,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412604663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:16:52,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1841170134] [2024-11-14 05:16:52,739 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:16:52,739 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:16:52,739 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:16:52,739 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:16:52,739 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:16:52,844 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:16:53,707 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78026#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:16:53,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:16:53,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:16:53,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82, 82] total 124 [2024-11-14 05:16:53,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527467823] [2024-11-14 05:16:53,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:16:53,708 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2024-11-14 05:16:53,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:16:53,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2024-11-14 05:16:53,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3555, Invalid=14001, Unknown=0, NotChecked=0, Total=17556 [2024-11-14 05:16:53,710 INFO L87 Difference]: Start difference. First operand 245 states and 247 transitions. Second operand has 124 states, 124 states have (on average 3.2903225806451615) internal successors, (408), 124 states have internal predecessors, (408), 0 states have call successors, (0), 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 05:16:56,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:16:56,053 INFO L93 Difference]: Finished difference Result 530 states and 573 transitions. [2024-11-14 05:16:56,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-11-14 05:16:56,053 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.2903225806451615) internal successors, (408), 124 states have internal predecessors, (408), 0 states have call successors, (0), 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 244 [2024-11-14 05:16:56,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:16:56,054 INFO L225 Difference]: With dead ends: 530 [2024-11-14 05:16:56,054 INFO L226 Difference]: Without dead ends: 367 [2024-11-14 05:16:56,056 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 602 SyntacticMatches, 79 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11523 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=6837, Invalid=22919, Unknown=0, NotChecked=0, Total=29756 [2024-11-14 05:16:56,056 INFO L432 NwaCegarLoop]: 82 mSDtfsCounter, 378 mSDsluCounter, 999 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1081 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:16:56,056 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1081 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1133 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:16:56,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2024-11-14 05:16:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 247. [2024-11-14 05:16:56,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0121951219512195) internal successors, (249), 246 states have internal predecessors, (249), 0 states have call successors, (0), 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 05:16:56,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2024-11-14 05:16:56,080 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 244 [2024-11-14 05:16:56,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:16:56,081 INFO L471 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2024-11-14 05:16:56,081 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.2903225806451615) internal successors, (408), 124 states have internal predecessors, (408), 0 states have call successors, (0), 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 05:16:56,081 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2024-11-14 05:16:56,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2024-11-14 05:16:56,082 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:16:56,082 INFO L215 NwaCegarLoop]: trace histogram [41, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:16:56,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-11-14 05:16:56,283 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:56,283 INFO L396 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:16:56,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:16:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1303896548, now seen corresponding path program 57 times [2024-11-14 05:16:56,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:16:56,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365661665] [2024-11-14 05:16:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:16:56,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:16:56,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:16:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1560 proven. 3122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:58,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:16:58,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365661665] [2024-11-14 05:16:58,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365661665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:16:58,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012329765] [2024-11-14 05:16:58,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:16:58,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:16:58,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:16:58,213 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:16:58,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-11-14 05:16:58,643 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:16:58,643 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:16:58,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 911 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-11-14 05:16:58,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:16:58,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1640 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:16:58,934 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:00,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4682 backedges. 1640 proven. 3042 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:00,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012329765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:00,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1026339735] [2024-11-14 05:17:00,633 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:00,634 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:00,634 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:00,634 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:00,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:00,843 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:01,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '80653#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:17:01,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:01,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:01,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 46 [2024-11-14 05:17:01,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881241557] [2024-11-14 05:17:01,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:01,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-14 05:17:01,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:01,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-14 05:17:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=2083, Unknown=0, NotChecked=0, Total=3080 [2024-11-14 05:17:01,289 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand has 47 states, 47 states have (on average 5.680851063829787) internal successors, (267), 46 states have internal predecessors, (267), 0 states have call successors, (0), 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 05:17:02,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:02,227 INFO L93 Difference]: Finished difference Result 264 states and 267 transitions. [2024-11-14 05:17:02,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-14 05:17:02,227 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 5.680851063829787) internal successors, (267), 46 states have internal predecessors, (267), 0 states have call successors, (0), 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 246 [2024-11-14 05:17:02,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:02,228 INFO L225 Difference]: With dead ends: 264 [2024-11-14 05:17:02,228 INFO L226 Difference]: Without dead ends: 262 [2024-11-14 05:17:02,229 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 859 GetRequests, 683 SyntacticMatches, 81 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4454 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2883, Invalid=6429, Unknown=0, NotChecked=0, Total=9312 [2024-11-14 05:17:02,229 INFO L432 NwaCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:02,229 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 314 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:17:02,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2024-11-14 05:17:02,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 255. [2024-11-14 05:17:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0118110236220472) internal successors, (257), 254 states have internal predecessors, (257), 0 states have call successors, (0), 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 05:17:02,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2024-11-14 05:17:02,243 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 246 [2024-11-14 05:17:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:02,243 INFO L471 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2024-11-14 05:17:02,243 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 5.680851063829787) internal successors, (267), 46 states have internal predecessors, (267), 0 states have call successors, (0), 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 05:17:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2024-11-14 05:17:02,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2024-11-14 05:17:02,244 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:02,244 INFO L215 NwaCegarLoop]: trace histogram [42, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:02,265 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-11-14 05:17:02,445 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-11-14 05:17:02,445 INFO L396 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:02,445 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:02,445 INFO L85 PathProgramCache]: Analyzing trace with hash -185458046, now seen corresponding path program 58 times [2024-11-14 05:17:02,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:02,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268035192] [2024-11-14 05:17:02,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:02,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3242 proven. 1760 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:06,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268035192] [2024-11-14 05:17:06,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268035192] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646668473] [2024-11-14 05:17:06,401 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:06,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:06,403 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:06,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-11-14 05:17:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:06,834 INFO L255 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-11-14 05:17:06,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:10,202 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3360 proven. 1640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:17:10,202 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:12,687 INFO L134 CoverageAnalysis]: Checked inductivity of 5002 backedges. 3360 proven. 1640 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:17:12,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646668473] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:12,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1405861094] [2024-11-14 05:17:12,689 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:12,689 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:12,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:12,689 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:12,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:12,807 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:13,644 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '83078#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:17:13,644 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:13,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 84, 84] total 128 [2024-11-14 05:17:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412610685] [2024-11-14 05:17:13,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:13,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2024-11-14 05:17:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:13,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2024-11-14 05:17:13,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3768, Invalid=14864, Unknown=0, NotChecked=0, Total=18632 [2024-11-14 05:17:13,647 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand has 128 states, 128 states have (on average 3.328125) internal successors, (426), 128 states have internal predecessors, (426), 0 states have call successors, (0), 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 05:17:16,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:16,140 INFO L93 Difference]: Finished difference Result 549 states and 593 transitions. [2024-11-14 05:17:16,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-11-14 05:17:16,140 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 3.328125) internal successors, (426), 128 states have internal predecessors, (426), 0 states have call successors, (0), 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 254 [2024-11-14 05:17:16,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:16,141 INFO L225 Difference]: With dead ends: 549 [2024-11-14 05:17:16,141 INFO L226 Difference]: Without dead ends: 380 [2024-11-14 05:17:16,142 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 886 GetRequests, 629 SyntacticMatches, 81 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12230 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=7214, Invalid=24292, Unknown=0, NotChecked=0, Total=31506 [2024-11-14 05:17:16,143 INFO L432 NwaCegarLoop]: 84 mSDtfsCounter, 346 mSDsluCounter, 950 mSDsCounter, 0 mSdLazyCounter, 1082 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 1235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:16,143 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 1034 Invalid, 1235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1082 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:17:16,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2024-11-14 05:17:16,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 257. [2024-11-14 05:17:16,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.01171875) internal successors, (259), 256 states have internal predecessors, (259), 0 states have call successors, (0), 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 05:17:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 259 transitions. [2024-11-14 05:17:16,158 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 259 transitions. Word has length 254 [2024-11-14 05:17:16,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:16,158 INFO L471 AbstractCegarLoop]: Abstraction has 257 states and 259 transitions. [2024-11-14 05:17:16,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 3.328125) internal successors, (426), 128 states have internal predecessors, (426), 0 states have call successors, (0), 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 05:17:16,158 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 259 transitions. [2024-11-14 05:17:16,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2024-11-14 05:17:16,159 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:16,159 INFO L215 NwaCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:16,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-11-14 05:17:16,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:16,360 INFO L396 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:16,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:16,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1603691289, now seen corresponding path program 59 times [2024-11-14 05:17:16,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:16,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176601362] [2024-11-14 05:17:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:16,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 3242 proven. 1842 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:20,316 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:20,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176601362] [2024-11-14 05:17:20,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176601362] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:20,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621855439] [2024-11-14 05:17:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:20,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:20,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:20,318 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:20,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-11-14 05:17:20,859 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2024-11-14 05:17:20,859 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:20,864 INFO L255 TraceCheckSpWp]: Trace formula consists of 945 conjuncts, 86 conjuncts are in the unsatisfiable core [2024-11-14 05:17:20,866 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 3362 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:24,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 5084 backedges. 3362 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:26,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621855439] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:26,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1282366000] [2024-11-14 05:17:26,922 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:26,922 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:26,922 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:26,923 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:26,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:27,032 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:27,919 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '85888#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:17:27,919 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:27,919 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:27,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 86] total 130 [2024-11-14 05:17:27,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971399871] [2024-11-14 05:17:27,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:27,920 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2024-11-14 05:17:27,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:27,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2024-11-14 05:17:27,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3899, Invalid=15283, Unknown=0, NotChecked=0, Total=19182 [2024-11-14 05:17:27,923 INFO L87 Difference]: Start difference. First operand 257 states and 259 transitions. Second operand has 130 states, 130 states have (on average 3.292307692307692) internal successors, (428), 130 states have internal predecessors, (428), 0 states have call successors, (0), 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 05:17:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:30,617 INFO L93 Difference]: Finished difference Result 556 states and 601 transitions. [2024-11-14 05:17:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-14 05:17:30,617 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 3.292307692307692) internal successors, (428), 130 states have internal predecessors, (428), 0 states have call successors, (0), 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 256 [2024-11-14 05:17:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:30,619 INFO L225 Difference]: With dead ends: 556 [2024-11-14 05:17:30,619 INFO L226 Difference]: Without dead ends: 385 [2024-11-14 05:17:30,622 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 894 GetRequests, 632 SyntacticMatches, 83 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12603 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=7513, Invalid=25067, Unknown=0, NotChecked=0, Total=32580 [2024-11-14 05:17:30,622 INFO L432 NwaCegarLoop]: 86 mSDtfsCounter, 384 mSDsluCounter, 881 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:30,622 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 967 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-11-14 05:17:30,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-11-14 05:17:30,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 259. [2024-11-14 05:17:30,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0116279069767442) internal successors, (261), 258 states have internal predecessors, (261), 0 states have call successors, (0), 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 05:17:30,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2024-11-14 05:17:30,643 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 256 [2024-11-14 05:17:30,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:30,643 INFO L471 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2024-11-14 05:17:30,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 3.292307692307692) internal successors, (428), 130 states have internal predecessors, (428), 0 states have call successors, (0), 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 05:17:30,644 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2024-11-14 05:17:30,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-14 05:17:30,646 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:30,646 INFO L215 NwaCegarLoop]: trace histogram [43, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:30,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2024-11-14 05:17:30,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2024-11-14 05:17:30,846 INFO L396 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:30,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:30,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1273762316, now seen corresponding path program 60 times [2024-11-14 05:17:30,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:30,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894509994] [2024-11-14 05:17:30,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:30,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:30,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:32,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 1722 proven. 3446 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:32,958 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894509994] [2024-11-14 05:17:32,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894509994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:32,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570244223] [2024-11-14 05:17:32,958 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:17:32,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:32,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:32,960 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:32,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-11-14 05:17:33,417 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:17:33,418 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:33,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 955 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-11-14 05:17:33,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:33,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 1806 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:33,785 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5168 backedges. 1806 proven. 3362 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:35,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570244223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:35,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1856065571] [2024-11-14 05:17:35,566 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:35,566 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:35,566 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:35,566 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:35,566 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:35,667 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:36,097 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '88643#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:17:36,098 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:36,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:36,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 48 [2024-11-14 05:17:36,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351709135] [2024-11-14 05:17:36,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:36,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 05:17:36,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 05:17:36,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=2220, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 05:17:36,099 INFO L87 Difference]: Start difference. First operand 259 states and 261 transitions. Second operand has 49 states, 49 states have (on average 5.6938775510204085) internal successors, (279), 48 states have internal predecessors, (279), 0 states have call successors, (0), 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 05:17:37,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:37,076 INFO L93 Difference]: Finished difference Result 276 states and 279 transitions. [2024-11-14 05:17:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-14 05:17:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 5.6938775510204085) internal successors, (279), 48 states have internal predecessors, (279), 0 states have call successors, (0), 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 258 [2024-11-14 05:17:37,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:37,077 INFO L225 Difference]: With dead ends: 276 [2024-11-14 05:17:37,077 INFO L226 Difference]: Without dead ends: 274 [2024-11-14 05:17:37,078 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 901 GetRequests, 717 SyntacticMatches, 85 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4842 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3150, Invalid=6950, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 05:17:37,078 INFO L432 NwaCegarLoop]: 51 mSDtfsCounter, 10 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:37,078 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 357 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 05:17:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2024-11-14 05:17:37,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2024-11-14 05:17:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 1.0112781954887218) internal successors, (269), 266 states have internal predecessors, (269), 0 states have call successors, (0), 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 05:17:37,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 269 transitions. [2024-11-14 05:17:37,106 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 269 transitions. Word has length 258 [2024-11-14 05:17:37,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:37,106 INFO L471 AbstractCegarLoop]: Abstraction has 267 states and 269 transitions. [2024-11-14 05:17:37,106 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 5.6938775510204085) internal successors, (279), 48 states have internal predecessors, (279), 0 states have call successors, (0), 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 05:17:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 269 transitions. [2024-11-14 05:17:37,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2024-11-14 05:17:37,108 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:37,108 INFO L215 NwaCegarLoop]: trace histogram [44, 43, 43, 43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:37,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-11-14 05:17:37,308 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2024-11-14 05:17:37,309 INFO L396 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:37,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash 823862898, now seen corresponding path program 61 times [2024-11-14 05:17:37,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:37,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651913957] [2024-11-14 05:17:37,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:37,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:37,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 3572 proven. 1932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:41,294 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651913957] [2024-11-14 05:17:41,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651913957] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:41,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891922967] [2024-11-14 05:17:41,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:17:41,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:41,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:41,296 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:41,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-11-14 05:17:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:41,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-14 05:17:41,763 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:17:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 3696 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:17:45,345 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:17:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5504 backedges. 3696 proven. 1806 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:17:48,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891922967] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:17:48,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1244842107] [2024-11-14 05:17:48,087 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:17:48,087 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:17:48,087 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:17:48,087 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:17:48,087 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:17:48,256 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:17:49,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '91182#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:17:49,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:17:49,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:17:49,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 88, 88] total 134 [2024-11-14 05:17:49,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140021649] [2024-11-14 05:17:49,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:17:49,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2024-11-14 05:17:49,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:17:49,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2024-11-14 05:17:49,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4122, Invalid=16184, Unknown=0, NotChecked=0, Total=20306 [2024-11-14 05:17:49,149 INFO L87 Difference]: Start difference. First operand 267 states and 269 transitions. Second operand has 134 states, 134 states have (on average 3.328358208955224) internal successors, (446), 134 states have internal predecessors, (446), 0 states have call successors, (0), 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 05:17:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:17:51,743 INFO L93 Difference]: Finished difference Result 575 states and 621 transitions. [2024-11-14 05:17:51,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-11-14 05:17:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 3.328358208955224) internal successors, (446), 134 states have internal predecessors, (446), 0 states have call successors, (0), 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 266 [2024-11-14 05:17:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:17:51,744 INFO L225 Difference]: With dead ends: 575 [2024-11-14 05:17:51,744 INFO L226 Difference]: Without dead ends: 398 [2024-11-14 05:17:51,746 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 659 SyntacticMatches, 85 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13342 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=7908, Invalid=26502, Unknown=0, NotChecked=0, Total=34410 [2024-11-14 05:17:51,747 INFO L432 NwaCegarLoop]: 88 mSDtfsCounter, 478 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:17:51,747 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 1094 Invalid, 1363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:17:51,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2024-11-14 05:17:51,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 269. [2024-11-14 05:17:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0111940298507462) internal successors, (271), 268 states have internal predecessors, (271), 0 states have call successors, (0), 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 05:17:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 271 transitions. [2024-11-14 05:17:51,769 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 271 transitions. Word has length 266 [2024-11-14 05:17:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:17:51,769 INFO L471 AbstractCegarLoop]: Abstraction has 269 states and 271 transitions. [2024-11-14 05:17:51,769 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 3.328358208955224) internal successors, (446), 134 states have internal predecessors, (446), 0 states have call successors, (0), 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 05:17:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 271 transitions. [2024-11-14 05:17:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2024-11-14 05:17:51,770 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:17:51,770 INFO L215 NwaCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:17:51,785 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-11-14 05:17:51,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-11-14 05:17:51,971 INFO L396 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:17:51,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:17:51,971 INFO L85 PathProgramCache]: Analyzing trace with hash -321048233, now seen corresponding path program 62 times [2024-11-14 05:17:51,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:17:51,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231205430] [2024-11-14 05:17:51,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:17:51,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:17:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:17:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3572 proven. 2018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:17:55,894 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:17:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231205430] [2024-11-14 05:17:55,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231205430] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:17:55,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987206788] [2024-11-14 05:17:55,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:17:55,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:17:55,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:17:55,896 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:17:55,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-11-14 05:17:56,468 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 44 check-sat command(s) [2024-11-14 05:17:56,468 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:17:56,473 INFO L255 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-11-14 05:17:56,475 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:00,220 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5590 backedges. 3698 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:03,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987206788] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:03,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [509611039] [2024-11-14 05:18:03,041 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:03,041 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:03,041 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:03,042 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:03,042 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:03,159 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:04,036 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '94124#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:18:04,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:04,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:04,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90, 90] total 136 [2024-11-14 05:18:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385881013] [2024-11-14 05:18:04,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:04,037 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2024-11-14 05:18:04,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2024-11-14 05:18:04,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4259, Invalid=16621, Unknown=0, NotChecked=0, Total=20880 [2024-11-14 05:18:04,038 INFO L87 Difference]: Start difference. First operand 269 states and 271 transitions. Second operand has 136 states, 136 states have (on average 3.2941176470588234) internal successors, (448), 136 states have internal predecessors, (448), 0 states have call successors, (0), 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 05:18:06,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:06,722 INFO L93 Difference]: Finished difference Result 582 states and 629 transitions. [2024-11-14 05:18:06,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2024-11-14 05:18:06,722 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 3.2941176470588234) internal successors, (448), 136 states have internal predecessors, (448), 0 states have call successors, (0), 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 268 [2024-11-14 05:18:06,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:06,723 INFO L225 Difference]: With dead ends: 582 [2024-11-14 05:18:06,723 INFO L226 Difference]: Without dead ends: 403 [2024-11-14 05:18:06,725 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 662 SyntacticMatches, 87 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13731 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=8221, Invalid=27311, Unknown=0, NotChecked=0, Total=35532 [2024-11-14 05:18:06,725 INFO L432 NwaCegarLoop]: 90 mSDtfsCounter, 465 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1144 SdHoareTripleChecker+Invalid, 1410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:06,725 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 1144 Invalid, 1410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:18:06,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2024-11-14 05:18:06,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 271. [2024-11-14 05:18:06,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.011111111111111) internal successors, (273), 270 states have internal predecessors, (273), 0 states have call successors, (0), 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 05:18:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 273 transitions. [2024-11-14 05:18:06,743 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 273 transitions. Word has length 268 [2024-11-14 05:18:06,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:06,743 INFO L471 AbstractCegarLoop]: Abstraction has 271 states and 273 transitions. [2024-11-14 05:18:06,743 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 3.2941176470588234) internal successors, (448), 136 states have internal predecessors, (448), 0 states have call successors, (0), 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 05:18:06,743 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 273 transitions. [2024-11-14 05:18:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2024-11-14 05:18:06,744 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:06,744 INFO L215 NwaCegarLoop]: trace histogram [45, 44, 44, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:06,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-11-14 05:18:06,944 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2024-11-14 05:18:06,944 INFO L396 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:18:06,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:06,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1069017348, now seen corresponding path program 63 times [2024-11-14 05:18:06,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:06,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849652539] [2024-11-14 05:18:06,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:06,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1892 proven. 3786 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:09,242 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849652539] [2024-11-14 05:18:09,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849652539] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:09,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817755993] [2024-11-14 05:18:09,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:18:09,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:09,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:09,246 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:09,247 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-11-14 05:18:09,751 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:09,751 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:09,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 999 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 05:18:09,758 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:10,065 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:10,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:12,008 INFO L134 CoverageAnalysis]: Checked inductivity of 5678 backedges. 1980 proven. 3698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:12,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817755993] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:12,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1614665173] [2024-11-14 05:18:12,009 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:12,009 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:12,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:12,009 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:12,009 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:12,210 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:12,662 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '97007#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:18:12,662 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:12,662 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:12,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 50 [2024-11-14 05:18:12,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447221847] [2024-11-14 05:18:12,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:12,663 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-11-14 05:18:12,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:12,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-11-14 05:18:12,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=2361, Unknown=0, NotChecked=0, Total=3540 [2024-11-14 05:18:12,663 INFO L87 Difference]: Start difference. First operand 271 states and 273 transitions. Second operand has 51 states, 51 states have (on average 5.705882352941177) internal successors, (291), 50 states have internal predecessors, (291), 0 states have call successors, (0), 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 05:18:13,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:13,714 INFO L93 Difference]: Finished difference Result 288 states and 291 transitions. [2024-11-14 05:18:13,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-14 05:18:13,714 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 5.705882352941177) internal successors, (291), 50 states have internal predecessors, (291), 0 states have call successors, (0), 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 270 [2024-11-14 05:18:13,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:13,715 INFO L225 Difference]: With dead ends: 288 [2024-11-14 05:18:13,715 INFO L226 Difference]: Without dead ends: 286 [2024-11-14 05:18:13,716 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 752 SyntacticMatches, 88 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5202 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3429, Invalid=7491, Unknown=0, NotChecked=0, Total=10920 [2024-11-14 05:18:13,716 INFO L432 NwaCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:13,716 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 422 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:18:13,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2024-11-14 05:18:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 279. [2024-11-14 05:18:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.0107913669064748) internal successors, (281), 278 states have internal predecessors, (281), 0 states have call successors, (0), 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 05:18:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 281 transitions. [2024-11-14 05:18:13,741 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 281 transitions. Word has length 270 [2024-11-14 05:18:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:13,741 INFO L471 AbstractCegarLoop]: Abstraction has 279 states and 281 transitions. [2024-11-14 05:18:13,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 5.705882352941177) internal successors, (291), 50 states have internal predecessors, (291), 0 states have call successors, (0), 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 05:18:13,741 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 281 transitions. [2024-11-14 05:18:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2024-11-14 05:18:13,742 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:13,742 INFO L215 NwaCegarLoop]: trace histogram [46, 45, 45, 45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:13,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:13,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:13,943 INFO L396 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:18:13,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:13,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1688519838, now seen corresponding path program 64 times [2024-11-14 05:18:13,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:13,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130659084] [2024-11-14 05:18:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:18,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 3918 proven. 2112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:18,157 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130659084] [2024-11-14 05:18:18,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130659084] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:18,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017594481] [2024-11-14 05:18:18,158 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:18:18,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:18,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:18,159 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:18,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-11-14 05:18:18,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:18,650 INFO L255 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-11-14 05:18:18,653 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4048 proven. 1980 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:18:22,596 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6030 backedges. 4048 proven. 1980 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:18:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017594481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1756150655] [2024-11-14 05:18:25,526 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:25,526 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:25,526 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:25,526 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:25,526 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:25,689 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:26,605 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '99660#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:18:26,605 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:26,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:26,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 92, 92] total 140 [2024-11-14 05:18:26,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675281250] [2024-11-14 05:18:26,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:26,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2024-11-14 05:18:26,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:26,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2024-11-14 05:18:26,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4492, Invalid=17560, Unknown=0, NotChecked=0, Total=22052 [2024-11-14 05:18:26,608 INFO L87 Difference]: Start difference. First operand 279 states and 281 transitions. Second operand has 140 states, 140 states have (on average 3.3285714285714287) internal successors, (466), 140 states have internal predecessors, (466), 0 states have call successors, (0), 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 05:18:29,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:29,842 INFO L93 Difference]: Finished difference Result 601 states and 649 transitions. [2024-11-14 05:18:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-11-14 05:18:29,843 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 3.3285714285714287) internal successors, (466), 140 states have internal predecessors, (466), 0 states have call successors, (0), 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 278 [2024-11-14 05:18:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:29,844 INFO L225 Difference]: With dead ends: 601 [2024-11-14 05:18:29,844 INFO L226 Difference]: Without dead ends: 416 [2024-11-14 05:18:29,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 970 GetRequests, 689 SyntacticMatches, 89 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14502 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=8634, Invalid=28808, Unknown=0, NotChecked=0, Total=37442 [2024-11-14 05:18:29,847 INFO L432 NwaCegarLoop]: 92 mSDtfsCounter, 376 mSDsluCounter, 1196 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1288 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:29,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1288 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:18:29,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2024-11-14 05:18:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 281. [2024-11-14 05:18:29,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0107142857142857) internal successors, (283), 280 states have internal predecessors, (283), 0 states have call successors, (0), 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 05:18:29,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 283 transitions. [2024-11-14 05:18:29,865 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 283 transitions. Word has length 278 [2024-11-14 05:18:29,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:29,865 INFO L471 AbstractCegarLoop]: Abstraction has 281 states and 283 transitions. [2024-11-14 05:18:29,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 3.3285714285714287) internal successors, (466), 140 states have internal predecessors, (466), 0 states have call successors, (0), 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 05:18:29,865 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 283 transitions. [2024-11-14 05:18:29,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2024-11-14 05:18:29,867 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:29,867 INFO L215 NwaCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:29,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:30,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-11-14 05:18:30,067 INFO L396 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:18:30,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:30,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1033049799, now seen corresponding path program 65 times [2024-11-14 05:18:30,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:30,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014142405] [2024-11-14 05:18:30,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:30,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:34,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 3918 proven. 2202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:34,439 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:34,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014142405] [2024-11-14 05:18:34,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014142405] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:34,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391315418] [2024-11-14 05:18:34,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:18:34,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:34,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:34,441 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:34,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-11-14 05:18:35,068 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2024-11-14 05:18:35,068 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:35,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-11-14 05:18:35,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 4050 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:39,179 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:42,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6120 backedges. 4050 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:42,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391315418] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:42,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [29374678] [2024-11-14 05:18:42,359 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:42,359 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:42,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:42,359 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:42,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:42,464 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:43,396 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '102734#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:18:43,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:43,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:43,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94, 94] total 142 [2024-11-14 05:18:43,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131689731] [2024-11-14 05:18:43,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:43,397 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2024-11-14 05:18:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:43,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2024-11-14 05:18:43,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4635, Invalid=18015, Unknown=0, NotChecked=0, Total=22650 [2024-11-14 05:18:43,399 INFO L87 Difference]: Start difference. First operand 281 states and 283 transitions. Second operand has 142 states, 142 states have (on average 3.295774647887324) internal successors, (468), 142 states have internal predecessors, (468), 0 states have call successors, (0), 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 05:18:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:46,355 INFO L93 Difference]: Finished difference Result 608 states and 657 transitions. [2024-11-14 05:18:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-11-14 05:18:46,355 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 3.295774647887324) internal successors, (468), 142 states have internal predecessors, (468), 0 states have call successors, (0), 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 280 [2024-11-14 05:18:46,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:46,357 INFO L225 Difference]: With dead ends: 608 [2024-11-14 05:18:46,357 INFO L226 Difference]: Without dead ends: 421 [2024-11-14 05:18:46,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 978 GetRequests, 692 SyntacticMatches, 91 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14907 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=8961, Invalid=29651, Unknown=0, NotChecked=0, Total=38612 [2024-11-14 05:18:46,359 INFO L432 NwaCegarLoop]: 94 mSDtfsCounter, 403 mSDsluCounter, 1124 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:46,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 1218 Invalid, 1440 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:18:46,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2024-11-14 05:18:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 283. [2024-11-14 05:18:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0106382978723405) internal successors, (285), 282 states have internal predecessors, (285), 0 states have call successors, (0), 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 05:18:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 285 transitions. [2024-11-14 05:18:46,378 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 285 transitions. Word has length 280 [2024-11-14 05:18:46,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:46,378 INFO L471 AbstractCegarLoop]: Abstraction has 283 states and 285 transitions. [2024-11-14 05:18:46,378 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 3.295774647887324) internal successors, (468), 142 states have internal predecessors, (468), 0 states have call successors, (0), 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 05:18:46,378 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 285 transitions. [2024-11-14 05:18:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2024-11-14 05:18:46,379 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:46,379 INFO L215 NwaCegarLoop]: trace histogram [47, 46, 46, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:46,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-11-14 05:18:46,579 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-11-14 05:18:46,580 INFO L396 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:18:46,580 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash 826387692, now seen corresponding path program 66 times [2024-11-14 05:18:46,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:46,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353541692] [2024-11-14 05:18:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:46,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2070 proven. 4142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:49,179 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353541692] [2024-11-14 05:18:49,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353541692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:49,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607889077] [2024-11-14 05:18:49,179 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:18:49,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:49,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:49,182 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:49,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-11-14 05:18:49,770 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:18:49,770 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:18:49,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 05:18:49,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:18:50,120 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:50,120 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:18:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6212 backedges. 2162 proven. 4050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1607889077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:18:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [53182800] [2024-11-14 05:18:52,171 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:18:52,171 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:18:52,171 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:18:52,171 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:18:52,171 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:18:52,277 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:18:52,750 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '105745#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:18:52,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:18:52,751 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:18:52,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 52 [2024-11-14 05:18:52,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113918048] [2024-11-14 05:18:52,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:18:52,751 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-14 05:18:52,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:18:52,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-14 05:18:52,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1276, Invalid=2506, Unknown=0, NotChecked=0, Total=3782 [2024-11-14 05:18:52,752 INFO L87 Difference]: Start difference. First operand 283 states and 285 transitions. Second operand has 53 states, 53 states have (on average 5.716981132075472) internal successors, (303), 52 states have internal predecessors, (303), 0 states have call successors, (0), 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 05:18:53,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:18:53,905 INFO L93 Difference]: Finished difference Result 300 states and 303 transitions. [2024-11-14 05:18:53,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-14 05:18:53,905 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 5.716981132075472) internal successors, (303), 52 states have internal predecessors, (303), 0 states have call successors, (0), 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 282 [2024-11-14 05:18:53,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:18:53,907 INFO L225 Difference]: With dead ends: 300 [2024-11-14 05:18:53,907 INFO L226 Difference]: Without dead ends: 298 [2024-11-14 05:18:53,907 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 985 GetRequests, 786 SyntacticMatches, 92 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5620 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3720, Invalid=8052, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 05:18:53,908 INFO L432 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:18:53,908 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 449 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:18:53,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2024-11-14 05:18:53,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2024-11-14 05:18:53,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.0103448275862068) internal successors, (293), 290 states have internal predecessors, (293), 0 states have call successors, (0), 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 05:18:53,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 293 transitions. [2024-11-14 05:18:53,926 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 293 transitions. Word has length 282 [2024-11-14 05:18:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:18:53,927 INFO L471 AbstractCegarLoop]: Abstraction has 291 states and 293 transitions. [2024-11-14 05:18:53,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 5.716981132075472) internal successors, (303), 52 states have internal predecessors, (303), 0 states have call successors, (0), 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 05:18:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 293 transitions. [2024-11-14 05:18:53,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2024-11-14 05:18:53,928 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:18:53,928 INFO L215 NwaCegarLoop]: trace histogram [48, 47, 47, 47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:18:53,950 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2024-11-14 05:18:54,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-11-14 05:18:54,128 INFO L396 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:18:54,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:18:54,129 INFO L85 PathProgramCache]: Analyzing trace with hash -669523630, now seen corresponding path program 67 times [2024-11-14 05:18:54,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:18:54,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288307809] [2024-11-14 05:18:54,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:18:54,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:18:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4280 proven. 2300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:18:58,760 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:18:58,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288307809] [2024-11-14 05:18:58,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288307809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:18:58,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309940973] [2024-11-14 05:18:58,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:18:58,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:18:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:18:58,762 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:18:58,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-11-14 05:18:59,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:18:59,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 1067 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-14 05:18:59,307 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:03,506 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:06,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6580 backedges. 4416 proven. 2162 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:06,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309940973] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:06,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [581139017] [2024-11-14 05:19:06,664 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:06,664 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:06,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:06,665 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:06,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:06,784 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:07,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '108512#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:19:07,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:07,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:07,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 96] total 146 [2024-11-14 05:19:07,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806707099] [2024-11-14 05:19:07,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:07,746 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-11-14 05:19:07,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:07,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-11-14 05:19:07,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4878, Invalid=18992, Unknown=0, NotChecked=0, Total=23870 [2024-11-14 05:19:07,748 INFO L87 Difference]: Start difference. First operand 291 states and 293 transitions. Second operand has 146 states, 146 states have (on average 3.328767123287671) internal successors, (486), 146 states have internal predecessors, (486), 0 states have call successors, (0), 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 05:19:10,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:10,793 INFO L93 Difference]: Finished difference Result 627 states and 677 transitions. [2024-11-14 05:19:10,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-11-14 05:19:10,793 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 3.328767123287671) internal successors, (486), 146 states have internal predecessors, (486), 0 states have call successors, (0), 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 290 [2024-11-14 05:19:10,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:10,795 INFO L225 Difference]: With dead ends: 627 [2024-11-14 05:19:10,795 INFO L226 Difference]: Without dead ends: 434 [2024-11-14 05:19:10,798 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 719 SyntacticMatches, 93 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15710 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=9392, Invalid=31210, Unknown=0, NotChecked=0, Total=40602 [2024-11-14 05:19:10,799 INFO L432 NwaCegarLoop]: 96 mSDtfsCounter, 485 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 1323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:10,799 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1047 Invalid, 1323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:19:10,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2024-11-14 05:19:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 293. [2024-11-14 05:19:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0102739726027397) internal successors, (295), 292 states have internal predecessors, (295), 0 states have call successors, (0), 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 05:19:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 295 transitions. [2024-11-14 05:19:10,833 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 295 transitions. Word has length 290 [2024-11-14 05:19:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:10,833 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 295 transitions. [2024-11-14 05:19:10,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 3.328767123287671) internal successors, (486), 146 states have internal predecessors, (486), 0 states have call successors, (0), 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 05:19:10,834 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 295 transitions. [2024-11-14 05:19:10,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2024-11-14 05:19:10,835 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:10,835 INFO L215 NwaCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:10,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-11-14 05:19:11,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-11-14 05:19:11,036 INFO L396 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:19:11,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash 269536567, now seen corresponding path program 68 times [2024-11-14 05:19:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522926258] [2024-11-14 05:19:11,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:11,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:15,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4280 proven. 2394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:15,674 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:15,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522926258] [2024-11-14 05:19:15,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522926258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:15,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3566293] [2024-11-14 05:19:15,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:15,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:15,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:15,676 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:15,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-11-14 05:19:16,341 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2024-11-14 05:19:16,341 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:16,347 INFO L255 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-11-14 05:19:16,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:20,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4418 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:20,646 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:23,949 INFO L134 CoverageAnalysis]: Checked inductivity of 6674 backedges. 4418 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:23,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3566293] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:23,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [18338293] [2024-11-14 05:19:23,950 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:23,950 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:23,951 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:23,951 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:23,951 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:24,055 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:25,001 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '111718#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:19:25,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:25,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:25,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 148 [2024-11-14 05:19:25,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520553527] [2024-11-14 05:19:25,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:25,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2024-11-14 05:19:25,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:25,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2024-11-14 05:19:25,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5027, Invalid=19465, Unknown=0, NotChecked=0, Total=24492 [2024-11-14 05:19:25,003 INFO L87 Difference]: Start difference. First operand 293 states and 295 transitions. Second operand has 148 states, 148 states have (on average 3.2972972972972974) internal successors, (488), 148 states have internal predecessors, (488), 0 states have call successors, (0), 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 05:19:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:28,114 INFO L93 Difference]: Finished difference Result 634 states and 685 transitions. [2024-11-14 05:19:28,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2024-11-14 05:19:28,114 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 148 states have (on average 3.2972972972972974) internal successors, (488), 148 states have internal predecessors, (488), 0 states have call successors, (0), 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 292 [2024-11-14 05:19:28,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:28,115 INFO L225 Difference]: With dead ends: 634 [2024-11-14 05:19:28,115 INFO L226 Difference]: Without dead ends: 439 [2024-11-14 05:19:28,117 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 722 SyntacticMatches, 95 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16131 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=9733, Invalid=32087, Unknown=0, NotChecked=0, Total=41820 [2024-11-14 05:19:28,117 INFO L432 NwaCegarLoop]: 98 mSDtfsCounter, 438 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 1435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:28,117 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [438 Valid, 1181 Invalid, 1435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:19:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-11-14 05:19:28,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 295. [2024-11-14 05:19:28,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.010204081632653) internal successors, (297), 294 states have internal predecessors, (297), 0 states have call successors, (0), 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 05:19:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 297 transitions. [2024-11-14 05:19:28,137 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 297 transitions. Word has length 292 [2024-11-14 05:19:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:28,137 INFO L471 AbstractCegarLoop]: Abstraction has 295 states and 297 transitions. [2024-11-14 05:19:28,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 148 states have (on average 3.2972972972972974) internal successors, (488), 148 states have internal predecessors, (488), 0 states have call successors, (0), 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 05:19:28,138 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 297 transitions. [2024-11-14 05:19:28,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2024-11-14 05:19:28,139 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:28,139 INFO L215 NwaCegarLoop]: trace histogram [49, 48, 48, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:28,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-11-14 05:19:28,339 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:28,339 INFO L396 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:19:28,339 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash 763253724, now seen corresponding path program 69 times [2024-11-14 05:19:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625444372] [2024-11-14 05:19:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:28,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2256 proven. 4514 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:31,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625444372] [2024-11-14 05:19:31,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625444372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:31,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093384510] [2024-11-14 05:19:31,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:19:31,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:31,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:31,170 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:31,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-11-14 05:19:31,718 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:19:31,718 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:19:31,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 99 conjuncts are in the unsatisfiable core [2024-11-14 05:19:31,726 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:32,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2352 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:32,055 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6770 backedges. 2352 proven. 4418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:34,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093384510] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:34,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228452114] [2024-11-14 05:19:34,260 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:34,260 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:34,260 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:34,260 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:34,260 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:34,447 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:34,946 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '114857#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:19:34,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:34,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:34,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 54 [2024-11-14 05:19:34,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608171940] [2024-11-14 05:19:34,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:34,947 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-11-14 05:19:34,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-11-14 05:19:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=2655, Unknown=0, NotChecked=0, Total=4032 [2024-11-14 05:19:34,948 INFO L87 Difference]: Start difference. First operand 295 states and 297 transitions. Second operand has 55 states, 55 states have (on average 5.7272727272727275) internal successors, (315), 54 states have internal predecessors, (315), 0 states have call successors, (0), 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 05:19:36,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:36,175 INFO L93 Difference]: Finished difference Result 312 states and 315 transitions. [2024-11-14 05:19:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-14 05:19:36,175 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 5.7272727272727275) internal successors, (315), 54 states have internal predecessors, (315), 0 states have call successors, (0), 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 294 [2024-11-14 05:19:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:36,177 INFO L225 Difference]: With dead ends: 312 [2024-11-14 05:19:36,177 INFO L226 Difference]: Without dead ends: 310 [2024-11-14 05:19:36,177 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 819 SyntacticMatches, 97 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6102 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4023, Invalid=8633, Unknown=0, NotChecked=0, Total=12656 [2024-11-14 05:19:36,178 INFO L432 NwaCegarLoop]: 57 mSDtfsCounter, 11 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:36,178 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 373 Invalid, 453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:19:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2024-11-14 05:19:36,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 303. [2024-11-14 05:19:36,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.009933774834437) internal successors, (305), 302 states have internal predecessors, (305), 0 states have call successors, (0), 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 05:19:36,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 305 transitions. [2024-11-14 05:19:36,200 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 305 transitions. Word has length 294 [2024-11-14 05:19:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:36,200 INFO L471 AbstractCegarLoop]: Abstraction has 303 states and 305 transitions. [2024-11-14 05:19:36,200 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 5.7272727272727275) internal successors, (315), 54 states have internal predecessors, (315), 0 states have call successors, (0), 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 05:19:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 305 transitions. [2024-11-14 05:19:36,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2024-11-14 05:19:36,201 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:36,201 INFO L215 NwaCegarLoop]: trace histogram [50, 49, 49, 49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:36,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-11-14 05:19:36,401 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:36,401 INFO L396 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:19:36,401 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash 947296322, now seen corresponding path program 70 times [2024-11-14 05:19:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657532275] [2024-11-14 05:19:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4658 proven. 2496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:41,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:41,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657532275] [2024-11-14 05:19:41,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657532275] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:41,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753372561] [2024-11-14 05:19:41,507 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:19:41,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:41,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:41,508 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:41,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-11-14 05:19:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:42,069 INFO L255 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-11-14 05:19:42,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:19:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4800 proven. 2352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:46,550 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:19:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7154 backedges. 4800 proven. 2352 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:19:49,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753372561] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:19:49,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [50964071] [2024-11-14 05:19:49,992 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:19:49,992 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:19:49,992 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:19:49,992 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:19:49,992 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:19:50,098 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:19:51,067 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '117738#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:19:51,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:19:51,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:19:51,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 100, 100] total 152 [2024-11-14 05:19:51,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631138095] [2024-11-14 05:19:51,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:19:51,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2024-11-14 05:19:51,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:19:51,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2024-11-14 05:19:51,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5280, Invalid=20480, Unknown=0, NotChecked=0, Total=25760 [2024-11-14 05:19:51,070 INFO L87 Difference]: Start difference. First operand 303 states and 305 transitions. Second operand has 152 states, 152 states have (on average 3.3289473684210527) internal successors, (506), 152 states have internal predecessors, (506), 0 states have call successors, (0), 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 05:19:54,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:19:54,389 INFO L93 Difference]: Finished difference Result 653 states and 705 transitions. [2024-11-14 05:19:54,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-11-14 05:19:54,389 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 3.3289473684210527) internal successors, (506), 152 states have internal predecessors, (506), 0 states have call successors, (0), 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 302 [2024-11-14 05:19:54,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:19:54,391 INFO L225 Difference]: With dead ends: 653 [2024-11-14 05:19:54,391 INFO L226 Difference]: Without dead ends: 452 [2024-11-14 05:19:54,394 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1054 GetRequests, 749 SyntacticMatches, 97 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16966 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=10182, Invalid=33708, Unknown=0, NotChecked=0, Total=43890 [2024-11-14 05:19:54,395 INFO L432 NwaCegarLoop]: 100 mSDtfsCounter, 654 mSDsluCounter, 1156 mSDsCounter, 0 mSdLazyCounter, 1311 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 654 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 1615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:19:54,395 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [654 Valid, 1256 Invalid, 1615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 1311 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:19:54,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2024-11-14 05:19:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 305. [2024-11-14 05:19:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.0098684210526316) internal successors, (307), 304 states have internal predecessors, (307), 0 states have call successors, (0), 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 05:19:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 307 transitions. [2024-11-14 05:19:54,431 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 307 transitions. Word has length 302 [2024-11-14 05:19:54,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:19:54,432 INFO L471 AbstractCegarLoop]: Abstraction has 305 states and 307 transitions. [2024-11-14 05:19:54,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 3.3289473684210527) internal successors, (506), 152 states have internal predecessors, (506), 0 states have call successors, (0), 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 05:19:54,432 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 307 transitions. [2024-11-14 05:19:54,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2024-11-14 05:19:54,433 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:19:54,433 INFO L215 NwaCegarLoop]: trace histogram [50, 50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:19:54,458 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-11-14 05:19:54,634 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:54,634 INFO L396 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:19:54,634 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:19:54,634 INFO L85 PathProgramCache]: Analyzing trace with hash -560212825, now seen corresponding path program 71 times [2024-11-14 05:19:54,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:19:54,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121053556] [2024-11-14 05:19:54,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:19:54,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:19:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:19:59,739 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 4658 proven. 2594 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:19:59,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:19:59,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121053556] [2024-11-14 05:19:59,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121053556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:19:59,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477897016] [2024-11-14 05:19:59,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:19:59,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:19:59,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:19:59,741 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:19:59,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-11-14 05:20:00,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 50 check-sat command(s) [2024-11-14 05:20:00,452 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:00,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 102 conjuncts are in the unsatisfiable core [2024-11-14 05:20:00,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:05,088 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 4802 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:05,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7252 backedges. 4802 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:08,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477897016] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:08,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1390905499] [2024-11-14 05:20:08,625 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:08,625 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:08,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:08,625 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:08,625 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:08,750 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:09,748 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '121076#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:20:09,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:09,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:09,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 154 [2024-11-14 05:20:09,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740870274] [2024-11-14 05:20:09,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:09,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2024-11-14 05:20:09,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:09,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2024-11-14 05:20:09,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5435, Invalid=20971, Unknown=0, NotChecked=0, Total=26406 [2024-11-14 05:20:09,751 INFO L87 Difference]: Start difference. First operand 305 states and 307 transitions. Second operand has 154 states, 154 states have (on average 3.2987012987012987) internal successors, (508), 154 states have internal predecessors, (508), 0 states have call successors, (0), 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 05:20:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:13,103 INFO L93 Difference]: Finished difference Result 660 states and 713 transitions. [2024-11-14 05:20:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-11-14 05:20:13,103 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 154 states have (on average 3.2987012987012987) internal successors, (508), 154 states have internal predecessors, (508), 0 states have call successors, (0), 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 304 [2024-11-14 05:20:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:13,105 INFO L225 Difference]: With dead ends: 660 [2024-11-14 05:20:13,105 INFO L226 Difference]: Without dead ends: 457 [2024-11-14 05:20:13,106 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1062 GetRequests, 752 SyntacticMatches, 99 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17403 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=10537, Invalid=34619, Unknown=0, NotChecked=0, Total=45156 [2024-11-14 05:20:13,107 INFO L432 NwaCegarLoop]: 102 mSDtfsCounter, 485 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1112 SdHoareTripleChecker+Invalid, 1389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:13,107 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1112 Invalid, 1389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-11-14 05:20:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2024-11-14 05:20:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 307. [2024-11-14 05:20:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0098039215686274) internal successors, (309), 306 states have internal predecessors, (309), 0 states have call successors, (0), 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 05:20:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 309 transitions. [2024-11-14 05:20:13,129 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 309 transitions. Word has length 304 [2024-11-14 05:20:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:13,129 INFO L471 AbstractCegarLoop]: Abstraction has 307 states and 309 transitions. [2024-11-14 05:20:13,129 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 154 states have (on average 3.2987012987012987) internal successors, (508), 154 states have internal predecessors, (508), 0 states have call successors, (0), 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 05:20:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 309 transitions. [2024-11-14 05:20:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2024-11-14 05:20:13,130 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:13,130 INFO L215 NwaCegarLoop]: trace histogram [51, 50, 50, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:13,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-11-14 05:20:13,330 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:13,331 INFO L396 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:20:13,331 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1872524340, now seen corresponding path program 72 times [2024-11-14 05:20:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:13,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792433835] [2024-11-14 05:20:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:13,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:13,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2450 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:16,280 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792433835] [2024-11-14 05:20:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792433835] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278277342] [2024-11-14 05:20:16,280 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:20:16,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:16,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:16,282 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:16,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-11-14 05:20:16,865 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:20:16,865 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:16,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-11-14 05:20:16,874 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:17,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2550 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:17,216 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:19,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7352 backedges. 2550 proven. 4802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:19,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278277342] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:19,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [174920127] [2024-11-14 05:20:19,636 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:19,636 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:19,637 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:19,637 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:19,637 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:19,781 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:20,258 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '124343#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:20:20,258 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:20,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:20,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 56 [2024-11-14 05:20:20,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412804054] [2024-11-14 05:20:20,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:20,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-11-14 05:20:20,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:20,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-11-14 05:20:20,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1482, Invalid=2808, Unknown=0, NotChecked=0, Total=4290 [2024-11-14 05:20:20,261 INFO L87 Difference]: Start difference. First operand 307 states and 309 transitions. Second operand has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 56 states have internal predecessors, (327), 0 states have call successors, (0), 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 05:20:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:21,531 INFO L93 Difference]: Finished difference Result 324 states and 327 transitions. [2024-11-14 05:20:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-11-14 05:20:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 56 states have internal predecessors, (327), 0 states have call successors, (0), 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 306 [2024-11-14 05:20:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:21,532 INFO L225 Difference]: With dead ends: 324 [2024-11-14 05:20:21,532 INFO L226 Difference]: Without dead ends: 322 [2024-11-14 05:20:21,533 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 853 SyntacticMatches, 101 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4338, Invalid=9234, Unknown=0, NotChecked=0, Total=13572 [2024-11-14 05:20:21,533 INFO L432 NwaCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:21,533 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 478 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:20:21,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2024-11-14 05:20:21,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2024-11-14 05:20:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.0095541401273886) internal successors, (317), 314 states have internal predecessors, (317), 0 states have call successors, (0), 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 05:20:21,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 317 transitions. [2024-11-14 05:20:21,556 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 317 transitions. Word has length 306 [2024-11-14 05:20:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:21,556 INFO L471 AbstractCegarLoop]: Abstraction has 315 states and 317 transitions. [2024-11-14 05:20:21,556 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 5.7368421052631575) internal successors, (327), 56 states have internal predecessors, (327), 0 states have call successors, (0), 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 05:20:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 317 transitions. [2024-11-14 05:20:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2024-11-14 05:20:21,557 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:21,557 INFO L215 NwaCegarLoop]: trace histogram [52, 51, 51, 51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:21,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-11-14 05:20:21,757 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:21,757 INFO L396 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:20:21,758 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:21,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1705189326, now seen corresponding path program 73 times [2024-11-14 05:20:21,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:21,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291615994] [2024-11-14 05:20:21,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:21,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:21,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5052 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:27,136 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291615994] [2024-11-14 05:20:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291615994] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:27,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715506221] [2024-11-14 05:20:27,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:20:27,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:27,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:27,138 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:27,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-11-14 05:20:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:27,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 1155 conjuncts, 104 conjuncts are in the unsatisfiable core [2024-11-14 05:20:27,738 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5200 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:20:32,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 7752 backedges. 5200 proven. 2550 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:20:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715506221] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:36,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460493600] [2024-11-14 05:20:36,252 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:36,252 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:36,252 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:36,253 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:36,253 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:36,360 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:37,366 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '127338#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:20:37,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:37,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:37,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 104, 104] total 158 [2024-11-14 05:20:37,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910251726] [2024-11-14 05:20:37,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:37,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2024-11-14 05:20:37,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:37,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2024-11-14 05:20:37,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5698, Invalid=22024, Unknown=0, NotChecked=0, Total=27722 [2024-11-14 05:20:37,371 INFO L87 Difference]: Start difference. First operand 315 states and 317 transitions. Second operand has 158 states, 158 states have (on average 3.329113924050633) internal successors, (526), 158 states have internal predecessors, (526), 0 states have call successors, (0), 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 05:20:40,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:20:40,975 INFO L93 Difference]: Finished difference Result 679 states and 733 transitions. [2024-11-14 05:20:40,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-11-14 05:20:40,975 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.329113924050633) internal successors, (526), 158 states have internal predecessors, (526), 0 states have call successors, (0), 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 314 [2024-11-14 05:20:40,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:20:40,977 INFO L225 Difference]: With dead ends: 679 [2024-11-14 05:20:40,977 INFO L226 Difference]: Without dead ends: 470 [2024-11-14 05:20:40,980 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 779 SyntacticMatches, 101 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18270 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=11004, Invalid=36302, Unknown=0, NotChecked=0, Total=47306 [2024-11-14 05:20:40,980 INFO L432 NwaCegarLoop]: 104 mSDtfsCounter, 494 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 1318 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 1540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:20:40,980 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 1266 Invalid, 1540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1318 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:20:40,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2024-11-14 05:20:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 317. [2024-11-14 05:20:41,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.009493670886076) internal successors, (319), 316 states have internal predecessors, (319), 0 states have call successors, (0), 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 05:20:41,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 319 transitions. [2024-11-14 05:20:41,010 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 319 transitions. Word has length 314 [2024-11-14 05:20:41,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:20:41,010 INFO L471 AbstractCegarLoop]: Abstraction has 317 states and 319 transitions. [2024-11-14 05:20:41,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.329113924050633) internal successors, (526), 158 states have internal predecessors, (526), 0 states have call successors, (0), 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 05:20:41,011 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 319 transitions. [2024-11-14 05:20:41,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2024-11-14 05:20:41,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:20:41,011 INFO L215 NwaCegarLoop]: trace histogram [52, 52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:20:41,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-11-14 05:20:41,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:41,212 INFO L396 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:20:41,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:20:41,212 INFO L85 PathProgramCache]: Analyzing trace with hash 3779863, now seen corresponding path program 74 times [2024-11-14 05:20:41,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:20:41,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898829292] [2024-11-14 05:20:41,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:20:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:20:41,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:20:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 7854 backedges. 5052 proven. 2802 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:46,688 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:20:46,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898829292] [2024-11-14 05:20:46,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898829292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:20:46,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081039220] [2024-11-14 05:20:46,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:20:46,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:20:46,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:20:46,690 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:20:46,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-11-14 05:20:47,442 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2024-11-14 05:20:47,442 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:20:47,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 106 conjuncts are in the unsatisfiable core [2024-11-14 05:20:47,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:20:52,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7854 backedges. 5202 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:52,498 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:20:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 7854 backedges. 5202 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:20:56,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081039220] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:20:56,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2117129235] [2024-11-14 05:20:56,315 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:20:56,315 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:20:56,315 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:20:56,315 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:20:56,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:20:56,452 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:20:57,463 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '130808#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:20:57,464 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:20:57,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:20:57,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 160 [2024-11-14 05:20:57,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267234598] [2024-11-14 05:20:57,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:20:57,464 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2024-11-14 05:20:57,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:20:57,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2024-11-14 05:20:57,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5859, Invalid=22533, Unknown=0, NotChecked=0, Total=28392 [2024-11-14 05:20:57,466 INFO L87 Difference]: Start difference. First operand 317 states and 319 transitions. Second operand has 160 states, 160 states have (on average 3.3) internal successors, (528), 160 states have internal predecessors, (528), 0 states have call successors, (0), 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 05:21:01,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:01,252 INFO L93 Difference]: Finished difference Result 686 states and 741 transitions. [2024-11-14 05:21:01,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2024-11-14 05:21:01,252 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 3.3) internal successors, (528), 160 states have internal predecessors, (528), 0 states have call successors, (0), 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 316 [2024-11-14 05:21:01,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:01,253 INFO L225 Difference]: With dead ends: 686 [2024-11-14 05:21:01,254 INFO L226 Difference]: Without dead ends: 475 [2024-11-14 05:21:01,256 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 782 SyntacticMatches, 103 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18723 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=11373, Invalid=37247, Unknown=0, NotChecked=0, Total=48620 [2024-11-14 05:21:01,256 INFO L432 NwaCegarLoop]: 106 mSDtfsCounter, 530 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1297 SdHoareTripleChecker+Invalid, 1593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:01,256 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1297 Invalid, 1593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:21:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2024-11-14 05:21:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 319. [2024-11-14 05:21:01,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.009433962264151) internal successors, (321), 318 states have internal predecessors, (321), 0 states have call successors, (0), 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 05:21:01,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 321 transitions. [2024-11-14 05:21:01,303 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 321 transitions. Word has length 316 [2024-11-14 05:21:01,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:01,303 INFO L471 AbstractCegarLoop]: Abstraction has 319 states and 321 transitions. [2024-11-14 05:21:01,304 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 3.3) internal successors, (528), 160 states have internal predecessors, (528), 0 states have call successors, (0), 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 05:21:01,304 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 321 transitions. [2024-11-14 05:21:01,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2024-11-14 05:21:01,305 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:01,305 INFO L215 NwaCegarLoop]: trace histogram [53, 52, 52, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:01,331 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-11-14 05:21:01,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:01,506 INFO L396 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:01,506 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:01,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1645663420, now seen corresponding path program 75 times [2024-11-14 05:21:01,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:01,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010862840] [2024-11-14 05:21:01,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:01,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:04,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2652 proven. 5306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:04,710 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010862840] [2024-11-14 05:21:04,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010862840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:04,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489493295] [2024-11-14 05:21:04,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:21:04,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:04,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:04,712 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:04,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-11-14 05:21:05,336 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:21:05,336 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:21:05,343 INFO L255 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-14 05:21:05,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:05,701 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2756 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:05,701 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:08,224 INFO L134 CoverageAnalysis]: Checked inductivity of 7958 backedges. 2756 proven. 5202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:08,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489493295] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:08,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1460860718] [2024-11-14 05:21:08,225 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:21:08,225 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:08,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:08,225 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:08,225 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:08,329 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:08,842 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '134203#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:21:08,842 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:08,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:08,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 58 [2024-11-14 05:21:08,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000434371] [2024-11-14 05:21:08,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:08,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-11-14 05:21:08,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:08,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-11-14 05:21:08,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1591, Invalid=2965, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 05:21:08,844 INFO L87 Difference]: Start difference. First operand 319 states and 321 transitions. Second operand has 59 states, 59 states have (on average 5.745762711864407) internal successors, (339), 58 states have internal predecessors, (339), 0 states have call successors, (0), 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 05:21:10,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:10,307 INFO L93 Difference]: Finished difference Result 336 states and 339 transitions. [2024-11-14 05:21:10,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-11-14 05:21:10,307 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 5.745762711864407) internal successors, (339), 58 states have internal predecessors, (339), 0 states have call successors, (0), 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 318 [2024-11-14 05:21:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:10,309 INFO L225 Difference]: With dead ends: 336 [2024-11-14 05:21:10,309 INFO L226 Difference]: Without dead ends: 334 [2024-11-14 05:21:10,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 888 SyntacticMatches, 104 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6970 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4665, Invalid=9855, Unknown=0, NotChecked=0, Total=14520 [2024-11-14 05:21:10,310 INFO L432 NwaCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 478 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:10,310 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 539 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:21:10,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2024-11-14 05:21:10,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2024-11-14 05:21:10,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 327 states, 326 states have (on average 1.00920245398773) internal successors, (329), 326 states have internal predecessors, (329), 0 states have call successors, (0), 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 05:21:10,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 329 transitions. [2024-11-14 05:21:10,350 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 329 transitions. Word has length 318 [2024-11-14 05:21:10,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:10,350 INFO L471 AbstractCegarLoop]: Abstraction has 327 states and 329 transitions. [2024-11-14 05:21:10,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 5.745762711864407) internal successors, (339), 58 states have internal predecessors, (339), 0 states have call successors, (0), 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 05:21:10,350 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 329 transitions. [2024-11-14 05:21:10,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2024-11-14 05:21:10,352 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:10,352 INFO L215 NwaCegarLoop]: trace histogram [54, 53, 53, 53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:10,372 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-11-14 05:21:10,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-11-14 05:21:10,553 INFO L396 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:10,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:10,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1215314210, now seen corresponding path program 76 times [2024-11-14 05:21:10,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:10,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310179475] [2024-11-14 05:21:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:10,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:10,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:16,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5462 proven. 2912 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:16,525 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:16,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310179475] [2024-11-14 05:21:16,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310179475] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:16,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011910069] [2024-11-14 05:21:16,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:21:16,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:16,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:16,527 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:16,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-11-14 05:21:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:17,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 1199 conjuncts, 108 conjuncts are in the unsatisfiable core [2024-11-14 05:21:17,163 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:22,325 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5616 proven. 2756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:22,325 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:26,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8374 backedges. 5616 proven. 2756 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:21:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011910069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:26,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1131954598] [2024-11-14 05:21:26,369 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:21:26,370 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:26,370 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:26,370 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:26,370 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:26,502 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:27,567 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '137312#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:21:27,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:27,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:27,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 108, 108] total 164 [2024-11-14 05:21:27,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964811506] [2024-11-14 05:21:27,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:27,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2024-11-14 05:21:27,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:27,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2024-11-14 05:21:27,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6132, Invalid=23624, Unknown=0, NotChecked=0, Total=29756 [2024-11-14 05:21:27,571 INFO L87 Difference]: Start difference. First operand 327 states and 329 transitions. Second operand has 164 states, 164 states have (on average 3.3292682926829267) internal successors, (546), 164 states have internal predecessors, (546), 0 states have call successors, (0), 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 05:21:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:31,403 INFO L93 Difference]: Finished difference Result 705 states and 761 transitions. [2024-11-14 05:21:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-11-14 05:21:31,403 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 3.3292682926829267) internal successors, (546), 164 states have internal predecessors, (546), 0 states have call successors, (0), 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 326 [2024-11-14 05:21:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:31,404 INFO L225 Difference]: With dead ends: 705 [2024-11-14 05:21:31,404 INFO L226 Difference]: Without dead ends: 488 [2024-11-14 05:21:31,407 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 809 SyntacticMatches, 105 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19622 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=11858, Invalid=38992, Unknown=0, NotChecked=0, Total=50850 [2024-11-14 05:21:31,407 INFO L432 NwaCegarLoop]: 108 mSDtfsCounter, 488 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 488 SdHoareTripleChecker+Valid, 1398 SdHoareTripleChecker+Invalid, 1671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:31,407 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [488 Valid, 1398 Invalid, 1671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:21:31,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2024-11-14 05:21:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 329. [2024-11-14 05:21:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0091463414634145) internal successors, (331), 328 states have internal predecessors, (331), 0 states have call successors, (0), 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 05:21:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 331 transitions. [2024-11-14 05:21:31,455 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 331 transitions. Word has length 326 [2024-11-14 05:21:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:31,455 INFO L471 AbstractCegarLoop]: Abstraction has 329 states and 331 transitions. [2024-11-14 05:21:31,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 3.3292682926829267) internal successors, (546), 164 states have internal predecessors, (546), 0 states have call successors, (0), 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 05:21:31,455 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 331 transitions. [2024-11-14 05:21:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2024-11-14 05:21:31,457 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:31,457 INFO L215 NwaCegarLoop]: trace histogram [54, 54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:31,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-11-14 05:21:31,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-11-14 05:21:31,657 INFO L396 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:31,657 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:31,657 INFO L85 PathProgramCache]: Analyzing trace with hash -2001742201, now seen corresponding path program 77 times [2024-11-14 05:21:31,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:31,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751512635] [2024-11-14 05:21:31,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:31,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:37,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5462 proven. 3018 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:37,816 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751512635] [2024-11-14 05:21:37,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751512635] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:37,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943026235] [2024-11-14 05:21:37,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:21:37,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:37,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:37,818 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:37,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-11-14 05:21:38,618 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 54 check-sat command(s) [2024-11-14 05:21:38,618 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:21:38,624 INFO L255 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 110 conjuncts are in the unsatisfiable core [2024-11-14 05:21:38,627 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:44,010 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:44,010 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:21:48,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8480 backedges. 5618 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:48,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943026235] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:21:48,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [492987983] [2024-11-14 05:21:48,141 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:21:48,141 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:21:48,141 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:21:48,141 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:21:48,141 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:21:48,253 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:21:49,301 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '140914#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:21:49,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:21:49,302 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:21:49,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110, 110] total 166 [2024-11-14 05:21:49,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154171161] [2024-11-14 05:21:49,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:21:49,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2024-11-14 05:21:49,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:21:49,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2024-11-14 05:21:49,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6299, Invalid=24151, Unknown=0, NotChecked=0, Total=30450 [2024-11-14 05:21:49,306 INFO L87 Difference]: Start difference. First operand 329 states and 331 transitions. Second operand has 166 states, 166 states have (on average 3.3012048192771086) internal successors, (548), 166 states have internal predecessors, (548), 0 states have call successors, (0), 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 05:21:53,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:21:53,354 INFO L93 Difference]: Finished difference Result 712 states and 769 transitions. [2024-11-14 05:21:53,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-11-14 05:21:53,354 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 3.3012048192771086) internal successors, (548), 166 states have internal predecessors, (548), 0 states have call successors, (0), 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 328 [2024-11-14 05:21:53,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:21:53,356 INFO L225 Difference]: With dead ends: 712 [2024-11-14 05:21:53,356 INFO L226 Difference]: Without dead ends: 493 [2024-11-14 05:21:53,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 812 SyntacticMatches, 107 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20091 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=12241, Invalid=39971, Unknown=0, NotChecked=0, Total=52212 [2024-11-14 05:21:53,359 INFO L432 NwaCegarLoop]: 110 mSDtfsCounter, 524 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 524 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:21:53,359 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [524 Valid, 1293 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:21:53,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-11-14 05:21:53,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 331. [2024-11-14 05:21:53,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.009090909090909) internal successors, (333), 330 states have internal predecessors, (333), 0 states have call successors, (0), 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 05:21:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 333 transitions. [2024-11-14 05:21:53,385 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 333 transitions. Word has length 328 [2024-11-14 05:21:53,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:21:53,385 INFO L471 AbstractCegarLoop]: Abstraction has 331 states and 333 transitions. [2024-11-14 05:21:53,385 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 3.3012048192771086) internal successors, (548), 166 states have internal predecessors, (548), 0 states have call successors, (0), 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 05:21:53,385 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 333 transitions. [2024-11-14 05:21:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2024-11-14 05:21:53,386 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:21:53,386 INFO L215 NwaCegarLoop]: trace histogram [55, 54, 54, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:21:53,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-11-14 05:21:53,586 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:53,587 INFO L396 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:21:53,587 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:21:53,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1216500052, now seen corresponding path program 78 times [2024-11-14 05:21:53,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:21:53,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826890143] [2024-11-14 05:21:53,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:21:53,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:21:53,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:21:57,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2862 proven. 5726 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:57,067 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:21:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826890143] [2024-11-14 05:21:57,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826890143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:21:57,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845041834] [2024-11-14 05:21:57,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:21:57,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:21:57,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:21:57,069 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:21:57,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-11-14 05:21:57,732 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:21:57,733 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:21:57,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 1219 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-14 05:21:57,742 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:21:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:21:58,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:00,827 INFO L134 CoverageAnalysis]: Checked inductivity of 8588 backedges. 2970 proven. 5618 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:00,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845041834] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:00,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1438227718] [2024-11-14 05:22:00,828 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:22:00,828 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:00,828 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:00,829 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:00,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:00,932 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:01,430 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '144437#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:22:01,430 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:01,430 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:01,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 60 [2024-11-14 05:22:01,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327270210] [2024-11-14 05:22:01,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:01,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-11-14 05:22:01,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:01,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-11-14 05:22:01,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1704, Invalid=3126, Unknown=0, NotChecked=0, Total=4830 [2024-11-14 05:22:01,432 INFO L87 Difference]: Start difference. First operand 331 states and 333 transitions. Second operand has 61 states, 61 states have (on average 5.754098360655738) internal successors, (351), 60 states have internal predecessors, (351), 0 states have call successors, (0), 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 05:22:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:22:02,885 INFO L93 Difference]: Finished difference Result 348 states and 351 transitions. [2024-11-14 05:22:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-14 05:22:02,885 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 5.754098360655738) internal successors, (351), 60 states have internal predecessors, (351), 0 states have call successors, (0), 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 330 [2024-11-14 05:22:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:22:02,886 INFO L225 Difference]: With dead ends: 348 [2024-11-14 05:22:02,886 INFO L226 Difference]: Without dead ends: 346 [2024-11-14 05:22:02,887 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1153 GetRequests, 922 SyntacticMatches, 108 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7452 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=5004, Invalid=10496, Unknown=0, NotChecked=0, Total=15500 [2024-11-14 05:22:02,888 INFO L432 NwaCegarLoop]: 63 mSDtfsCounter, 9 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 05:22:02,888 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 528 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 05:22:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2024-11-14 05:22:02,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2024-11-14 05:22:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.0088757396449703) internal successors, (341), 338 states have internal predecessors, (341), 0 states have call successors, (0), 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 05:22:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 341 transitions. [2024-11-14 05:22:02,912 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 341 transitions. Word has length 330 [2024-11-14 05:22:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:22:02,912 INFO L471 AbstractCegarLoop]: Abstraction has 339 states and 341 transitions. [2024-11-14 05:22:02,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 5.754098360655738) internal successors, (351), 60 states have internal predecessors, (351), 0 states have call successors, (0), 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 05:22:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 341 transitions. [2024-11-14 05:22:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2024-11-14 05:22:02,914 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:22:02,914 INFO L215 NwaCegarLoop]: trace histogram [56, 55, 55, 55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:22:02,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-11-14 05:22:03,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:03,114 INFO L396 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:22:03,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash -636083438, now seen corresponding path program 79 times [2024-11-14 05:22:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:22:03,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106549861] [2024-11-14 05:22:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:22:03,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 5888 proven. 3132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:09,363 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:22:09,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106549861] [2024-11-14 05:22:09,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106549861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:22:09,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491618044] [2024-11-14 05:22:09,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:22:09,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:09,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:22:09,365 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:22:09,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-11-14 05:22:10,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:10,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 112 conjuncts are in the unsatisfiable core [2024-11-14 05:22:10,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:15,565 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6048 proven. 2970 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:22:15,565 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9020 backedges. 6048 proven. 2970 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:22:19,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491618044] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:19,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1927034352] [2024-11-14 05:22:19,874 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:22:19,874 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:19,874 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:19,874 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:19,874 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:20,004 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:21,070 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '147660#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:22:21,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:21,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:21,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 112, 112] total 170 [2024-11-14 05:22:21,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628308179] [2024-11-14 05:22:21,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:21,072 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2024-11-14 05:22:21,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:21,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2024-11-14 05:22:21,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6582, Invalid=25280, Unknown=0, NotChecked=0, Total=31862 [2024-11-14 05:22:21,075 INFO L87 Difference]: Start difference. First operand 339 states and 341 transitions. Second operand has 170 states, 170 states have (on average 3.3294117647058825) internal successors, (566), 170 states have internal predecessors, (566), 0 states have call successors, (0), 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 05:22:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:22:25,148 INFO L93 Difference]: Finished difference Result 731 states and 789 transitions. [2024-11-14 05:22:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2024-11-14 05:22:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 3.3294117647058825) internal successors, (566), 170 states have internal predecessors, (566), 0 states have call successors, (0), 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 338 [2024-11-14 05:22:25,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:22:25,150 INFO L225 Difference]: With dead ends: 731 [2024-11-14 05:22:25,150 INFO L226 Difference]: Without dead ends: 506 [2024-11-14 05:22:25,152 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1180 GetRequests, 839 SyntacticMatches, 109 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21022 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=12744, Invalid=41778, Unknown=0, NotChecked=0, Total=54522 [2024-11-14 05:22:25,152 INFO L432 NwaCegarLoop]: 112 mSDtfsCounter, 719 mSDsluCounter, 1171 mSDsCounter, 0 mSdLazyCounter, 1348 mSolverCounterSat, 334 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 1682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 334 IncrementalHoareTripleChecker+Valid, 1348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:22:25,152 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [719 Valid, 1283 Invalid, 1682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [334 Valid, 1348 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:22:25,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2024-11-14 05:22:25,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 341. [2024-11-14 05:22:25,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0088235294117647) internal successors, (343), 340 states have internal predecessors, (343), 0 states have call successors, (0), 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 05:22:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 343 transitions. [2024-11-14 05:22:25,190 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 343 transitions. Word has length 338 [2024-11-14 05:22:25,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:22:25,190 INFO L471 AbstractCegarLoop]: Abstraction has 341 states and 343 transitions. [2024-11-14 05:22:25,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 3.3294117647058825) internal successors, (566), 170 states have internal predecessors, (566), 0 states have call successors, (0), 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 05:22:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 343 transitions. [2024-11-14 05:22:25,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2024-11-14 05:22:25,192 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:22:25,192 INFO L215 NwaCegarLoop]: trace histogram [56, 56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:22:25,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-11-14 05:22:25,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:25,393 INFO L396 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:22:25,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 679727351, now seen corresponding path program 80 times [2024-11-14 05:22:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:22:25,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425268796] [2024-11-14 05:22:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:22:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:32,553 INFO L134 CoverageAnalysis]: Checked inductivity of 9130 backedges. 5888 proven. 3242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:32,553 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:22:32,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425268796] [2024-11-14 05:22:32,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425268796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:22:32,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619917024] [2024-11-14 05:22:32,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:22:32,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:32,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:22:32,555 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:22:32,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-11-14 05:22:33,421 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 56 check-sat command(s) [2024-11-14 05:22:33,421 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:22:33,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 114 conjuncts are in the unsatisfiable core [2024-11-14 05:22:33,430 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 9130 backedges. 6050 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:39,227 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:44,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9130 backedges. 6050 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:44,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619917024] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:44,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78616714] [2024-11-14 05:22:44,131 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:22:44,131 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:44,131 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:44,131 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:44,131 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:44,238 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:45,351 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '151394#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:22:45,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:45,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:45,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114, 114] total 172 [2024-11-14 05:22:45,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390843289] [2024-11-14 05:22:45,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:45,352 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2024-11-14 05:22:45,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:45,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2024-11-14 05:22:45,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6755, Invalid=25825, Unknown=0, NotChecked=0, Total=32580 [2024-11-14 05:22:45,355 INFO L87 Difference]: Start difference. First operand 341 states and 343 transitions. Second operand has 172 states, 172 states have (on average 3.302325581395349) internal successors, (568), 172 states have internal predecessors, (568), 0 states have call successors, (0), 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 05:22:49,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:22:49,797 INFO L93 Difference]: Finished difference Result 738 states and 797 transitions. [2024-11-14 05:22:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2024-11-14 05:22:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 3.302325581395349) internal successors, (568), 172 states have internal predecessors, (568), 0 states have call successors, (0), 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 340 [2024-11-14 05:22:49,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:22:49,799 INFO L225 Difference]: With dead ends: 738 [2024-11-14 05:22:49,799 INFO L226 Difference]: Without dead ends: 511 [2024-11-14 05:22:49,802 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1188 GetRequests, 842 SyntacticMatches, 111 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21507 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=13141, Invalid=42791, Unknown=0, NotChecked=0, Total=55932 [2024-11-14 05:22:49,802 INFO L432 NwaCegarLoop]: 114 mSDtfsCounter, 619 mSDsluCounter, 1144 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-14 05:22:49,802 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [619 Valid, 1258 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1323 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-14 05:22:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-11-14 05:22:49,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 343. [2024-11-14 05:22:49,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.0087719298245614) internal successors, (345), 342 states have internal predecessors, (345), 0 states have call successors, (0), 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 05:22:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 345 transitions. [2024-11-14 05:22:49,837 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 345 transitions. Word has length 340 [2024-11-14 05:22:49,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:22:49,837 INFO L471 AbstractCegarLoop]: Abstraction has 343 states and 345 transitions. [2024-11-14 05:22:49,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 3.302325581395349) internal successors, (568), 172 states have internal predecessors, (568), 0 states have call successors, (0), 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 05:22:49,837 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 345 transitions. [2024-11-14 05:22:49,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2024-11-14 05:22:49,839 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:22:49,839 INFO L215 NwaCegarLoop]: trace histogram [57, 56, 56, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:22:49,865 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-11-14 05:22:50,039 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:50,040 INFO L396 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:22:50,040 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:22:50,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1841456740, now seen corresponding path program 81 times [2024-11-14 05:22:50,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:22:50,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635319290] [2024-11-14 05:22:50,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:22:50,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:22:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:22:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3080 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:53,868 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:22:53,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635319290] [2024-11-14 05:22:53,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635319290] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:22:53,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366185370] [2024-11-14 05:22:53,868 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:22:53,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:22:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:22:53,870 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:22:53,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-11-14 05:22:54,581 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:22:54,581 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:22:54,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-14 05:22:54,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:22:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:54,988 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:22:57,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9242 backedges. 3192 proven. 6050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:22:57,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366185370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:22:57,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565311148] [2024-11-14 05:22:57,917 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:22:57,917 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:22:57,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:22:57,918 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:22:57,918 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:22:58,033 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:22:58,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '155045#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:22:58,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:22:58,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:22:58,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 62 [2024-11-14 05:22:58,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005598919] [2024-11-14 05:22:58,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:22:58,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 05:22:58,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:22:58,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 05:22:58,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1821, Invalid=3291, Unknown=0, NotChecked=0, Total=5112 [2024-11-14 05:22:58,565 INFO L87 Difference]: Start difference. First operand 343 states and 345 transitions. Second operand has 63 states, 63 states have (on average 5.761904761904762) internal successors, (363), 62 states have internal predecessors, (363), 0 states have call successors, (0), 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 05:23:00,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:23:00,256 INFO L93 Difference]: Finished difference Result 360 states and 363 transitions. [2024-11-14 05:23:00,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-14 05:23:00,256 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 5.761904761904762) internal successors, (363), 62 states have internal predecessors, (363), 0 states have call successors, (0), 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 342 [2024-11-14 05:23:00,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:23:00,257 INFO L225 Difference]: With dead ends: 360 [2024-11-14 05:23:00,257 INFO L226 Difference]: Without dead ends: 358 [2024-11-14 05:23:00,258 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1195 GetRequests, 956 SyntacticMatches, 112 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7950 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5355, Invalid=11157, Unknown=0, NotChecked=0, Total=16512 [2024-11-14 05:23:00,258 INFO L432 NwaCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 600 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:23:00,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 600 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:23:00,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-11-14 05:23:00,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 351. [2024-11-14 05:23:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 350 states have (on average 1.0085714285714287) internal successors, (353), 350 states have internal predecessors, (353), 0 states have call successors, (0), 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 05:23:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 353 transitions. [2024-11-14 05:23:00,285 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 353 transitions. Word has length 342 [2024-11-14 05:23:00,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:23:00,285 INFO L471 AbstractCegarLoop]: Abstraction has 351 states and 353 transitions. [2024-11-14 05:23:00,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 5.761904761904762) internal successors, (363), 62 states have internal predecessors, (363), 0 states have call successors, (0), 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 05:23:00,285 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 353 transitions. [2024-11-14 05:23:00,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2024-11-14 05:23:00,286 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:23:00,286 INFO L215 NwaCegarLoop]: trace histogram [58, 57, 57, 57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:23:00,304 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2024-11-14 05:23:00,487 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:00,487 INFO L396 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:23:00,487 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:23:00,487 INFO L85 PathProgramCache]: Analyzing trace with hash 326376962, now seen corresponding path program 82 times [2024-11-14 05:23:00,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:23:00,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973777669] [2024-11-14 05:23:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:23:00,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:23:00,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6330 proven. 3360 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:23:07,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:23:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973777669] [2024-11-14 05:23:07,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973777669] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:23:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104732528] [2024-11-14 05:23:07,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:23:07,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:07,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:23:07,654 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:23:07,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-11-14 05:23:08,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:08,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 1287 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-14 05:23:08,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:23:14,666 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:23:14,667 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:23:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 9690 backedges. 6496 proven. 3192 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:23:19,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104732528] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:23:19,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [85759086] [2024-11-14 05:23:19,356 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:23:19,356 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:23:19,356 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:23:19,356 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:23:19,356 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:23:19,505 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:23:20,680 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '158382#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:23:20,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:23:20,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:23:20,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 116, 116] total 176 [2024-11-14 05:23:20,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416653883] [2024-11-14 05:23:20,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:23:20,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2024-11-14 05:23:20,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:23:20,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2024-11-14 05:23:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7048, Invalid=26992, Unknown=0, NotChecked=0, Total=34040 [2024-11-14 05:23:20,683 INFO L87 Difference]: Start difference. First operand 351 states and 353 transitions. Second operand has 176 states, 176 states have (on average 3.3295454545454546) internal successors, (586), 176 states have internal predecessors, (586), 0 states have call successors, (0), 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 05:23:25,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:23:25,458 INFO L93 Difference]: Finished difference Result 757 states and 817 transitions. [2024-11-14 05:23:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-11-14 05:23:25,458 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 3.3295454545454546) internal successors, (586), 176 states have internal predecessors, (586), 0 states have call successors, (0), 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 350 [2024-11-14 05:23:25,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:23:25,460 INFO L225 Difference]: With dead ends: 757 [2024-11-14 05:23:25,461 INFO L226 Difference]: Without dead ends: 524 [2024-11-14 05:23:25,463 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1222 GetRequests, 869 SyntacticMatches, 113 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22470 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=13662, Invalid=44660, Unknown=0, NotChecked=0, Total=58322 [2024-11-14 05:23:25,463 INFO L432 NwaCegarLoop]: 116 mSDtfsCounter, 597 mSDsluCounter, 1343 mSDsCounter, 0 mSdLazyCounter, 1525 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 1797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 1525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:23:25,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1459 Invalid, 1797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 1525 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:23:25,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2024-11-14 05:23:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 353. [2024-11-14 05:23:25,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0085227272727273) internal successors, (355), 352 states have internal predecessors, (355), 0 states have call successors, (0), 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 05:23:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 355 transitions. [2024-11-14 05:23:25,495 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 355 transitions. Word has length 350 [2024-11-14 05:23:25,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:23:25,495 INFO L471 AbstractCegarLoop]: Abstraction has 353 states and 355 transitions. [2024-11-14 05:23:25,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 3.3295454545454546) internal successors, (586), 176 states have internal predecessors, (586), 0 states have call successors, (0), 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 05:23:25,496 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 355 transitions. [2024-11-14 05:23:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2024-11-14 05:23:25,497 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:23:25,498 INFO L215 NwaCegarLoop]: trace histogram [58, 58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:23:25,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-11-14 05:23:25,698 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:25,698 INFO L396 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:23:25,698 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:23:25,698 INFO L85 PathProgramCache]: Analyzing trace with hash 217783399, now seen corresponding path program 83 times [2024-11-14 05:23:25,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:23:25,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140035516] [2024-11-14 05:23:25,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:23:25,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:23:25,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:33,126 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6330 proven. 3474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:23:33,126 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:23:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140035516] [2024-11-14 05:23:33,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140035516] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:23:33,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120491891] [2024-11-14 05:23:33,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:23:33,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:33,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:23:33,129 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:23:33,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-11-14 05:23:34,061 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2024-11-14 05:23:34,061 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:23:34,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 118 conjuncts are in the unsatisfiable core [2024-11-14 05:23:34,072 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:23:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:23:40,312 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:23:45,057 INFO L134 CoverageAnalysis]: Checked inductivity of 9804 backedges. 6498 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:23:45,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120491891] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:23:45,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [409556598] [2024-11-14 05:23:45,058 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:23:45,058 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:23:45,058 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:23:45,058 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:23:45,058 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:23:45,174 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:23:46,287 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '162248#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:23:46,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:23:46,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:23:46,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118, 118] total 178 [2024-11-14 05:23:46,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165102460] [2024-11-14 05:23:46,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:23:46,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2024-11-14 05:23:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:23:46,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2024-11-14 05:23:46,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7227, Invalid=27555, Unknown=0, NotChecked=0, Total=34782 [2024-11-14 05:23:46,291 INFO L87 Difference]: Start difference. First operand 353 states and 355 transitions. Second operand has 178 states, 178 states have (on average 3.303370786516854) internal successors, (588), 178 states have internal predecessors, (588), 0 states have call successors, (0), 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 05:23:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:23:51,248 INFO L93 Difference]: Finished difference Result 764 states and 825 transitions. [2024-11-14 05:23:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-11-14 05:23:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.303370786516854) internal successors, (588), 178 states have internal predecessors, (588), 0 states have call successors, (0), 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 352 [2024-11-14 05:23:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:23:51,250 INFO L225 Difference]: With dead ends: 764 [2024-11-14 05:23:51,250 INFO L226 Difference]: Without dead ends: 529 [2024-11-14 05:23:51,252 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 872 SyntacticMatches, 115 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22971 ImplicationChecksByTransitivity, 17.4s TimeCoverageRelationStatistics Valid=14073, Invalid=45707, Unknown=0, NotChecked=0, Total=59780 [2024-11-14 05:23:51,253 INFO L432 NwaCegarLoop]: 118 mSDtfsCounter, 580 mSDsluCounter, 1385 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 1503 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-14 05:23:51,253 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 1503 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-11-14 05:23:51,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2024-11-14 05:23:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 355. [2024-11-14 05:23:51,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0084745762711864) internal successors, (357), 354 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 05:23:51,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 357 transitions. [2024-11-14 05:23:51,286 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 357 transitions. Word has length 352 [2024-11-14 05:23:51,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:23:51,286 INFO L471 AbstractCegarLoop]: Abstraction has 355 states and 357 transitions. [2024-11-14 05:23:51,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.303370786516854) internal successors, (588), 178 states have internal predecessors, (588), 0 states have call successors, (0), 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 05:23:51,286 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 357 transitions. [2024-11-14 05:23:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2024-11-14 05:23:51,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:23:51,287 INFO L215 NwaCegarLoop]: trace histogram [59, 58, 58, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:23:51,320 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2024-11-14 05:23:51,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-11-14 05:23:51,488 INFO L396 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:23:51,488 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:23:51,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1061415540, now seen corresponding path program 84 times [2024-11-14 05:23:51,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:23:51,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816783637] [2024-11-14 05:23:51,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:23:51,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:23:51,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:23:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3306 proven. 6614 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:23:56,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:23:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816783637] [2024-11-14 05:23:56,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816783637] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:23:56,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444104427] [2024-11-14 05:23:56,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:23:56,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:23:56,374 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:23:56,376 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:23:56,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-11-14 05:23:57,135 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:23:57,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:23:57,142 INFO L255 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-14 05:23:57,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:23:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:23:57,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:24:00,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 3422 proven. 6498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:24:00,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444104427] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:24:00,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [228236921] [2024-11-14 05:24:00,873 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:24:00,873 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:24:00,873 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:24:00,873 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:24:00,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:24:00,997 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:24:01,590 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '166027#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:24:01,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:24:01,590 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:24:01,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 64 [2024-11-14 05:24:01,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331295564] [2024-11-14 05:24:01,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:24:01,591 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-14 05:24:01,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:24:01,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-14 05:24:01,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1942, Invalid=3460, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 05:24:01,593 INFO L87 Difference]: Start difference. First operand 355 states and 357 transitions. Second operand has 65 states, 65 states have (on average 5.769230769230769) internal successors, (375), 64 states have internal predecessors, (375), 0 states have call successors, (0), 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 05:24:03,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:24:03,324 INFO L93 Difference]: Finished difference Result 372 states and 375 transitions. [2024-11-14 05:24:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-11-14 05:24:03,324 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 5.769230769230769) internal successors, (375), 64 states have internal predecessors, (375), 0 states have call successors, (0), 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 354 [2024-11-14 05:24:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:24:03,326 INFO L225 Difference]: With dead ends: 372 [2024-11-14 05:24:03,326 INFO L226 Difference]: Without dead ends: 370 [2024-11-14 05:24:03,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1237 GetRequests, 990 SyntacticMatches, 116 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8464 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=5718, Invalid=11838, Unknown=0, NotChecked=0, Total=17556 [2024-11-14 05:24:03,327 INFO L432 NwaCegarLoop]: 67 mSDtfsCounter, 11 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 531 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:24:03,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 531 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:24:03,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2024-11-14 05:24:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2024-11-14 05:24:03,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.0082872928176796) internal successors, (365), 362 states have internal predecessors, (365), 0 states have call successors, (0), 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 05:24:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 365 transitions. [2024-11-14 05:24:03,358 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 365 transitions. Word has length 354 [2024-11-14 05:24:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:24:03,358 INFO L471 AbstractCegarLoop]: Abstraction has 363 states and 365 transitions. [2024-11-14 05:24:03,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 5.769230769230769) internal successors, (375), 64 states have internal predecessors, (375), 0 states have call successors, (0), 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 05:24:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 365 transitions. [2024-11-14 05:24:03,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2024-11-14 05:24:03,359 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:24:03,359 INFO L215 NwaCegarLoop]: trace histogram [60, 59, 59, 59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:24:03,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-11-14 05:24:03,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-11-14 05:24:03,559 INFO L396 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:24:03,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:24:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash -982537742, now seen corresponding path program 85 times [2024-11-14 05:24:03,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:24:03,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688488536] [2024-11-14 05:24:03,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:24:03,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:24:03,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:24:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6788 proven. 3596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:24:12,013 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:24:12,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688488536] [2024-11-14 05:24:12,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688488536] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:24:12,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714636676] [2024-11-14 05:24:12,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:24:12,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:24:12,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:24:12,016 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:24:12,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-11-14 05:24:12,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:24:12,819 INFO L255 TraceCheckSpWp]: Trace formula consists of 1331 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-11-14 05:24:12,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:24:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6960 proven. 3422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:24:19,762 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:24:25,074 INFO L134 CoverageAnalysis]: Checked inductivity of 10384 backedges. 6960 proven. 3422 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-14 05:24:25,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714636676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:24:25,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1579491979] [2024-11-14 05:24:25,075 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:24:25,075 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:24:25,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:24:25,075 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:24:25,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:24:25,278 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:24:26,598 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '169478#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:24:26,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:24:26,598 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:24:26,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 120, 120] total 182 [2024-11-14 05:24:26,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915416301] [2024-11-14 05:24:26,599 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:24:26,600 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2024-11-14 05:24:26,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:24:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2024-11-14 05:24:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7530, Invalid=28760, Unknown=0, NotChecked=0, Total=36290 [2024-11-14 05:24:26,604 INFO L87 Difference]: Start difference. First operand 363 states and 365 transitions. Second operand has 182 states, 182 states have (on average 3.32967032967033) internal successors, (606), 182 states have internal predecessors, (606), 0 states have call successors, (0), 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 05:24:32,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:24:32,279 INFO L93 Difference]: Finished difference Result 783 states and 845 transitions. [2024-11-14 05:24:32,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2024-11-14 05:24:32,279 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 3.32967032967033) internal successors, (606), 182 states have internal predecessors, (606), 0 states have call successors, (0), 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 362 [2024-11-14 05:24:32,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:24:32,281 INFO L225 Difference]: With dead ends: 783 [2024-11-14 05:24:32,282 INFO L226 Difference]: Without dead ends: 542 [2024-11-14 05:24:32,285 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1264 GetRequests, 899 SyntacticMatches, 117 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23966 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=14612, Invalid=47638, Unknown=0, NotChecked=0, Total=62250 [2024-11-14 05:24:32,285 INFO L432 NwaCegarLoop]: 120 mSDtfsCounter, 558 mSDsluCounter, 1304 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1424 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:24:32,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1424 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:24:32,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2024-11-14 05:24:32,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 365. [2024-11-14 05:24:32,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.0082417582417582) internal successors, (367), 364 states have internal predecessors, (367), 0 states have call successors, (0), 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 05:24:32,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 367 transitions. [2024-11-14 05:24:32,323 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 367 transitions. Word has length 362 [2024-11-14 05:24:32,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:24:32,323 INFO L471 AbstractCegarLoop]: Abstraction has 365 states and 367 transitions. [2024-11-14 05:24:32,323 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 3.32967032967033) internal successors, (606), 182 states have internal predecessors, (606), 0 states have call successors, (0), 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 05:24:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 367 transitions. [2024-11-14 05:24:32,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 365 [2024-11-14 05:24:32,325 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:24:32,325 INFO L215 NwaCegarLoop]: trace histogram [60, 60, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:24:32,348 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-11-14 05:24:32,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-11-14 05:24:32,525 INFO L396 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:24:32,525 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:24:32,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1071957801, now seen corresponding path program 86 times [2024-11-14 05:24:32,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:24:32,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847767102] [2024-11-14 05:24:32,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:24:32,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:24:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:24:41,182 INFO L134 CoverageAnalysis]: Checked inductivity of 10502 backedges. 6788 proven. 3714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:24:41,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:24:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847767102] [2024-11-14 05:24:41,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847767102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:24:41,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201019569] [2024-11-14 05:24:41,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 05:24:41,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:24:41,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:24:41,185 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:24:41,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-11-14 05:24:42,215 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 60 check-sat command(s) [2024-11-14 05:24:42,215 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:24:42,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 1341 conjuncts, 122 conjuncts are in the unsatisfiable core [2024-11-14 05:24:42,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:24:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 10502 backedges. 6962 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:24:48,768 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:24:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10502 backedges. 6962 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:24:54,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201019569] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:24:54,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1036539099] [2024-11-14 05:24:54,587 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:24:54,587 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:24:54,587 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:24:54,587 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:24:54,587 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:24:54,699 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:24:55,857 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '173476#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:24:55,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:24:55,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:24:55,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122, 122] total 184 [2024-11-14 05:24:55,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134839455] [2024-11-14 05:24:55,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:24:55,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2024-11-14 05:24:55,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:24:55,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2024-11-14 05:24:55,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7715, Invalid=29341, Unknown=0, NotChecked=0, Total=37056 [2024-11-14 05:24:55,860 INFO L87 Difference]: Start difference. First operand 365 states and 367 transitions. Second operand has 184 states, 184 states have (on average 3.3043478260869565) internal successors, (608), 184 states have internal predecessors, (608), 0 states have call successors, (0), 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 05:25:01,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:25:01,348 INFO L93 Difference]: Finished difference Result 790 states and 853 transitions. [2024-11-14 05:25:01,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2024-11-14 05:25:01,348 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 3.3043478260869565) internal successors, (608), 184 states have internal predecessors, (608), 0 states have call successors, (0), 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 364 [2024-11-14 05:25:01,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:25:01,351 INFO L225 Difference]: With dead ends: 790 [2024-11-14 05:25:01,351 INFO L226 Difference]: Without dead ends: 547 [2024-11-14 05:25:01,353 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1272 GetRequests, 902 SyntacticMatches, 119 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24483 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=15037, Invalid=48719, Unknown=0, NotChecked=0, Total=63756 [2024-11-14 05:25:01,354 INFO L432 NwaCegarLoop]: 122 mSDtfsCounter, 585 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 1539 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 1476 SdHoareTripleChecker+Invalid, 1803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 1539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-14 05:25:01,354 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 1476 Invalid, 1803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 1539 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-11-14 05:25:01,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2024-11-14 05:25:01,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 367. [2024-11-14 05:25:01,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.0081967213114753) internal successors, (369), 366 states have internal predecessors, (369), 0 states have call successors, (0), 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 05:25:01,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 369 transitions. [2024-11-14 05:25:01,396 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 369 transitions. Word has length 364 [2024-11-14 05:25:01,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:25:01,396 INFO L471 AbstractCegarLoop]: Abstraction has 367 states and 369 transitions. [2024-11-14 05:25:01,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 3.3043478260869565) internal successors, (608), 184 states have internal predecessors, (608), 0 states have call successors, (0), 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 05:25:01,396 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 369 transitions. [2024-11-14 05:25:01,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2024-11-14 05:25:01,397 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:25:01,397 INFO L215 NwaCegarLoop]: trace histogram [61, 60, 60, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:25:01,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-11-14 05:25:01,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:01,598 INFO L396 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:25:01,598 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:25:01,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1105288580, now seen corresponding path program 87 times [2024-11-14 05:25:01,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:25:01,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975625561] [2024-11-14 05:25:01,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:25:01,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:25:01,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:25:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3540 proven. 7082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:06,362 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:25:06,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975625561] [2024-11-14 05:25:06,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975625561] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:25:06,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644156495] [2024-11-14 05:25:06,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 05:25:06,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:06,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:25:06,364 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:25:06,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-11-14 05:25:07,166 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 05:25:07,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 05:25:07,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 1351 conjuncts, 126 conjuncts are in the unsatisfiable core [2024-11-14 05:25:07,179 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 05:25:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:07,640 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 05:25:11,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10622 backedges. 3660 proven. 6962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644156495] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 05:25:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [331342045] [2024-11-14 05:25:11,180 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2024-11-14 05:25:11,180 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 05:25:11,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 05:25:11,180 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 05:25:11,180 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 05:25:11,292 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 05:25:11,864 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '177383#(and (<= 1 |#StackHeapBarrier|) (= (+ |ULTIMATE.start_main_~k~0#1| 1) 0) (<= 0 |ULTIMATE.start_main_~j~0#1|) (<= 0 |ULTIMATE.start_main_~n~0#1|))' at error location [2024-11-14 05:25:11,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 05:25:11,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 05:25:11,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 66 [2024-11-14 05:25:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045005126] [2024-11-14 05:25:11,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 05:25:11,865 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-11-14 05:25:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 05:25:11,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-11-14 05:25:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2067, Invalid=3633, Unknown=0, NotChecked=0, Total=5700 [2024-11-14 05:25:11,867 INFO L87 Difference]: Start difference. First operand 367 states and 369 transitions. Second operand has 67 states, 67 states have (on average 5.776119402985074) internal successors, (387), 66 states have internal predecessors, (387), 0 states have call successors, (0), 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 05:25:13,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 05:25:13,635 INFO L93 Difference]: Finished difference Result 384 states and 387 transitions. [2024-11-14 05:25:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2024-11-14 05:25:13,635 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 5.776119402985074) internal successors, (387), 66 states have internal predecessors, (387), 0 states have call successors, (0), 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 366 [2024-11-14 05:25:13,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 05:25:13,637 INFO L225 Difference]: With dead ends: 384 [2024-11-14 05:25:13,637 INFO L226 Difference]: Without dead ends: 382 [2024-11-14 05:25:13,638 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 1279 GetRequests, 1024 SyntacticMatches, 120 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8994 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6093, Invalid=12539, Unknown=0, NotChecked=0, Total=18632 [2024-11-14 05:25:13,638 INFO L432 NwaCegarLoop]: 69 mSDtfsCounter, 9 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 573 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 05:25:13,638 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 466 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 573 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 05:25:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-11-14 05:25:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 375. [2024-11-14 05:25:13,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 374 states have (on average 1.0080213903743316) internal successors, (377), 374 states have internal predecessors, (377), 0 states have call successors, (0), 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 05:25:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 377 transitions. [2024-11-14 05:25:13,671 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 377 transitions. Word has length 366 [2024-11-14 05:25:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 05:25:13,672 INFO L471 AbstractCegarLoop]: Abstraction has 375 states and 377 transitions. [2024-11-14 05:25:13,672 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 5.776119402985074) internal successors, (387), 66 states have internal predecessors, (387), 0 states have call successors, (0), 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 05:25:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 377 transitions. [2024-11-14 05:25:13,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2024-11-14 05:25:13,689 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 05:25:13,689 INFO L215 NwaCegarLoop]: trace histogram [62, 61, 61, 61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 05:25:13,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2024-11-14 05:25:13,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:13,890 INFO L396 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 05:25:13,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 05:25:13,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1381087518, now seen corresponding path program 88 times [2024-11-14 05:25:13,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 05:25:13,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080575232] [2024-11-14 05:25:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 05:25:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 05:25:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:25:22,190 INFO L134 CoverageAnalysis]: Checked inductivity of 11102 backedges. 7262 proven. 3840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 05:25:22,190 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 05:25:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080575232] [2024-11-14 05:25:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080575232] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 05:25:22,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515866612] [2024-11-14 05:25:22,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 05:25:22,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 05:25:22,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 05:25:22,193 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 05:25:22,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ff4ceb75-82c6-4c25-b08c-debce30e87ee/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-11-14 05:25:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 05:25:22,999 INFO L255 TraceCheckSpWp]: Trace formula consists of 1375 conjuncts, 124 conjuncts are in the unsatisfiable core [2024-11-14 05:25:23,002 INFO L278 TraceCheckSpWp]: Computing forward predicates...