./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/pr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 826ab2ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/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_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-tiling/pr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/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_9c8abb80-27ee-4421-9193-8683d9b12b5c/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 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 04:31:09,197 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 04:31:09,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 04:31:09,279 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 04:31:09,280 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 04:31:09,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 04:31:09,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 04:31:09,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 04:31:09,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 04:31:09,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 04:31:09,311 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 04:31:09,311 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 04:31:09,312 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 04:31:09,312 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 04:31:09,312 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 04:31:09,312 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 04:31:09,312 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 04:31:09,312 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 04:31:09,313 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 04:31:09,313 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 04:31:09,313 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 04:31:09,313 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 04:31:09,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 04:31:09,314 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 04:31:09,314 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 04:31:09,314 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 04:31:09,315 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 04:31:09,315 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 04:31:09,315 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 04:31:09,315 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 04:31:09,315 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 04:31:09,315 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 04:31:09,316 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 04:31:09,316 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 04:31:09,316 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 04:31:09,316 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 04:31:09,316 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 04:31:09,317 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 04:31:09,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:31:09,317 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 04:31:09,317 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 04:31:09,318 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 04:31:09,318 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 04:31:09,318 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 04:31:09,318 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 04:31:09,318 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 04:31:09,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 04:31:09,318 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_9c8abb80-27ee-4421-9193-8683d9b12b5c/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 -> 14a75e050103eb09182e049a798a738dec478e3acaa4fb01ae8649b715b8362f [2024-11-14 04:31:09,673 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 04:31:09,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 04:31:09,687 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 04:31:09,690 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 04:31:09,690 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 04:31:09,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/array-tiling/pr4.c Unable to find full path for "g++" [2024-11-14 04:31:11,869 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 04:31:12,228 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 04:31:12,229 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/sv-benchmarks/c/array-tiling/pr4.c [2024-11-14 04:31:12,241 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/data/e9f865ccc/ba9c97ebcf204a8d89ab7f0b3744f5fc/FLAG6665623f5 [2024-11-14 04:31:12,265 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/data/e9f865ccc/ba9c97ebcf204a8d89ab7f0b3744f5fc [2024-11-14 04:31:12,268 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 04:31:12,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 04:31:12,272 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 04:31:12,272 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 04:31:12,278 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 04:31:12,279 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,280 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15616bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12, skipping insertion in model container [2024-11-14 04:31:12,280 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,302 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 04:31:12,474 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_9c8abb80-27ee-4421-9193-8683d9b12b5c/sv-benchmarks/c/array-tiling/pr4.c[394,407] [2024-11-14 04:31:12,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:31:12,528 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 04:31:12,540 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_9c8abb80-27ee-4421-9193-8683d9b12b5c/sv-benchmarks/c/array-tiling/pr4.c[394,407] [2024-11-14 04:31:12,558 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 04:31:12,575 INFO L204 MainTranslator]: Completed translation [2024-11-14 04:31:12,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12 WrapperNode [2024-11-14 04:31:12,576 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 04:31:12,577 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 04:31:12,577 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 04:31:12,578 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 04:31:12,586 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,593 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,622 INFO L138 Inliner]: procedures = 15, calls = 28, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 82 [2024-11-14 04:31:12,623 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 04:31:12,626 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 04:31:12,626 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 04:31:12,626 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 04:31:12,637 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,638 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,643 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,645 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,659 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,670 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,674 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,676 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 04:31:12,681 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 04:31:12,681 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 04:31:12,682 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 04:31:12,683 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (1/1) ... [2024-11-14 04:31:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 04:31:12,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:12,734 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 04:31:12,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 04:31:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 04:31:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 04:31:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-14 04:31:12,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2024-11-14 04:31:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 04:31:12,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 04:31:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2024-11-14 04:31:12,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-14 04:31:12,885 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 04:31:12,887 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 04:31:13,210 INFO L? ?]: Removed 12 outVars from TransFormulas that were not future-live. [2024-11-14 04:31:13,210 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 04:31:13,379 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 04:31:13,380 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 04:31:13,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:31:13 BoogieIcfgContainer [2024-11-14 04:31:13,380 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 04:31:13,383 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 04:31:13,384 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 04:31:13,394 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 04:31:13,394 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 04:31:12" (1/3) ... [2024-11-14 04:31:13,395 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:31:13, skipping insertion in model container [2024-11-14 04:31:13,395 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 04:31:12" (2/3) ... [2024-11-14 04:31:13,397 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@668922 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 04:31:13, skipping insertion in model container [2024-11-14 04:31:13,397 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 04:31:13" (3/3) ... [2024-11-14 04:31:13,399 INFO L112 eAbstractionObserver]: Analyzing ICFG pr4.c [2024-11-14 04:31:13,423 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 04:31:13,428 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG pr4.c that has 1 procedures, 12 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 04:31:13,513 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 04:31:13,535 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;@7eaf33d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 04:31:13,535 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 04:31:13,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 04:31:13,550 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:13,550 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:13,551 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:13,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1137407830, now seen corresponding path program 1 times [2024-11-14 04:31:13,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:13,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653534450] [2024-11-14 04:31:13,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:13,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:13,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:14,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:14,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653534450] [2024-11-14 04:31:14,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653534450] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 04:31:14,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 04:31:14,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-14 04:31:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255911318] [2024-11-14 04:31:14,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 04:31:14,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 04:31:14,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:14,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 04:31:14,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:31:14,164 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:14,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:14,243 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2024-11-14 04:31:14,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-14 04:31:14,245 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 04:31:14,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:14,252 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:31:14,253 INFO L226 Difference]: Without dead ends: 10 [2024-11-14 04:31:14,255 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-14 04:31:14,258 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 12 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:14,259 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 14 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 04:31:14,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2024-11-14 04:31:14,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2024-11-14 04:31:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:14,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2024-11-14 04:31:14,301 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 7 [2024-11-14 04:31:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:14,302 INFO L471 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2024-11-14 04:31:14,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2024-11-14 04:31:14,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-14 04:31:14,303 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:14,303 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:14,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 04:31:14,303 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:14,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:14,304 INFO L85 PathProgramCache]: Analyzing trace with hash 893534866, now seen corresponding path program 1 times [2024-11-14 04:31:14,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:14,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493177870] [2024-11-14 04:31:14,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:14,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:16,080 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:16,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493177870] [2024-11-14 04:31:16,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493177870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:16,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830856400] [2024-11-14 04:31:16,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:16,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:16,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:16,086 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:16,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 04:31:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:16,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-11-14 04:31:16,237 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:16,684 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-14 04:31:17,070 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 103 [2024-11-14 04:31:17,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:17,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 82 [2024-11-14 04:31:17,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 29 [2024-11-14 04:31:17,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 174 [2024-11-14 04:31:18,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 87 [2024-11-14 04:31:18,295 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 169 [2024-11-14 04:31:18,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 230 [2024-11-14 04:31:18,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:18,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 61 [2024-11-14 04:31:18,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:18,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 61 [2024-11-14 04:31:18,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:18,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 61 [2024-11-14 04:31:19,040 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 51 [2024-11-14 04:31:19,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 43 [2024-11-14 04:31:19,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 38 [2024-11-14 04:31:19,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2024-11-14 04:31:19,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-14 04:31:19,692 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:19,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 162 treesize of output 98 [2024-11-14 04:31:19,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:19,765 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:20,036 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:20,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:31:20,608 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:20,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 210 [2024-11-14 04:31:20,815 INFO L349 Elim1Store]: treesize reduction 13, result has 86.6 percent of original size [2024-11-14 04:31:20,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 130 [2024-11-14 04:31:21,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:31:21,283 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:21,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 35 [2024-11-14 04:31:21,384 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:21,384 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 210 [2024-11-14 04:31:21,494 INFO L349 Elim1Store]: treesize reduction 13, result has 86.6 percent of original size [2024-11-14 04:31:21,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 130 [2024-11-14 04:31:21,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:21,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 18 [2024-11-14 04:31:21,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:21,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 18 [2024-11-14 04:31:21,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 6 [2024-11-14 04:31:21,890 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:31:21,938 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:31:22,018 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:31:22,018 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 178 treesize of output 93 [2024-11-14 04:31:22,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:22,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830856400] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:22,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1196829032] [2024-11-14 04:31:22,085 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2024-11-14 04:31:22,085 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:22,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:22,096 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:22,097 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:22,721 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:23,365 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '119#(and (= |ULTIMATE.start_main_~i~0#1| 0) (<= 1 ~CELLCOUNT~0))' at error location [2024-11-14 04:31:23,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:23,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:23,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 15 [2024-11-14 04:31:23,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591509916] [2024-11-14 04:31:23,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:23,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-14 04:31:23,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-14 04:31:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-14 04:31:23,370 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:24,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:24,466 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-14 04:31:24,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:31:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2024-11-14 04:31:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:24,467 INFO L225 Difference]: With dead ends: 24 [2024-11-14 04:31:24,467 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 04:31:24,468 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=130, Invalid=520, Unknown=0, NotChecked=0, Total=650 [2024-11-14 04:31:24,469 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:24,470 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 15 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:31:24,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 04:31:24,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2024-11-14 04:31:24,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:24,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2024-11-14 04:31:24,477 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 8 [2024-11-14 04:31:24,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:24,478 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2024-11-14 04:31:24,478 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:24,478 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2024-11-14 04:31:24,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-14 04:31:24,478 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:24,478 INFO L215 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:24,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 04:31:24,679 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2024-11-14 04:31:24,679 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:24,680 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:24,680 INFO L85 PathProgramCache]: Analyzing trace with hash -905233987, now seen corresponding path program 1 times [2024-11-14 04:31:24,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:24,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067508403] [2024-11-14 04:31:24,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:24,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:25,695 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:25,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067508403] [2024-11-14 04:31:25,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067508403] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:25,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440094124] [2024-11-14 04:31:25,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:25,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:25,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:25,700 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:25,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 04:31:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:25,805 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-14 04:31:25,817 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:25,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:25,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-14 04:31:26,132 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 74 [2024-11-14 04:31:26,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:31:26,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 93 [2024-11-14 04:31:26,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 82 [2024-11-14 04:31:26,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2024-11-14 04:31:26,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2024-11-14 04:31:26,368 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 28 [2024-11-14 04:31:26,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2024-11-14 04:31:26,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:26,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 94 [2024-11-14 04:31:26,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 94 treesize of output 78 [2024-11-14 04:31:26,462 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 70 [2024-11-14 04:31:26,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-14 04:31:27,118 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:27,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 129 treesize of output 81 [2024-11-14 04:31:27,197 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:27,198 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:27,403 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:27,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:31:27,694 INFO L349 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2024-11-14 04:31:27,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 148 [2024-11-14 04:31:27,805 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2024-11-14 04:31:27,867 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:27,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 22 [2024-11-14 04:31:27,930 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:27,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 165 [2024-11-14 04:31:27,995 INFO L349 Elim1Store]: treesize reduction 13, result has 79.0 percent of original size [2024-11-14 04:31:27,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 78 [2024-11-14 04:31:28,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 4 [2024-11-14 04:31:28,209 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 4 [2024-11-14 04:31:28,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 6 [2024-11-14 04:31:28,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:31:28,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:31:28,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 53 [2024-11-14 04:31:28,380 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:31:28,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 82 [2024-11-14 04:31:28,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:28,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440094124] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:28,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1658949273] [2024-11-14 04:31:28,417 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:31:28,417 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:28,418 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:28,418 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:28,418 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:28,950 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:29,405 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '269#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:31:29,405 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:29,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:29,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2024-11-14 04:31:29,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525576918] [2024-11-14 04:31:29,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:29,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-14 04:31:29,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:29,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-14 04:31:29,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2024-11-14 04:31:29,408 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:30,210 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-11-14 04:31:30,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-14 04:31:30,211 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2024-11-14 04:31:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:30,212 INFO L225 Difference]: With dead ends: 22 [2024-11-14 04:31:30,212 INFO L226 Difference]: Without dead ends: 20 [2024-11-14 04:31:30,212 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:31:30,213 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:30,214 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 16 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:31:30,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-11-14 04:31:30,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2024-11-14 04:31:30,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:30,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-11-14 04:31:30,221 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 11 [2024-11-14 04:31:30,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:30,222 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-11-14 04:31:30,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:30,222 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-11-14 04:31:30,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-11-14 04:31:30,223 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:30,223 INFO L215 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:30,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:30,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2024-11-14 04:31:30,424 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:30,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:30,425 INFO L85 PathProgramCache]: Analyzing trace with hash -180479587, now seen corresponding path program 2 times [2024-11-14 04:31:30,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:30,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985005147] [2024-11-14 04:31:30,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:30,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:31,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:31,310 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:31,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985005147] [2024-11-14 04:31:31,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985005147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:31,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220517519] [2024-11-14 04:31:31,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:31:31,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:31,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:31,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:31,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 04:31:31,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-14 04:31:31,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:31,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 04:31:31,455 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:31,494 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-14 04:31:31,527 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:31:31,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-14 04:31:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:31,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:32,109 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:32,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:31:32,170 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 34 [2024-11-14 04:31:32,191 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:31:32,191 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 12 [2024-11-14 04:31:32,201 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-14 04:31:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:32,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220517519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:32,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [587347218] [2024-11-14 04:31:32,227 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:31:32,227 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:32,227 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:32,228 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:32,228 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:32,861 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:33,312 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '460#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3))' at error location [2024-11-14 04:31:33,312 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:33,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:33,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 24 [2024-11-14 04:31:33,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003457330] [2024-11-14 04:31:33,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:33,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-14 04:31:33,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:33,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-14 04:31:33,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2024-11-14 04:31:33,316 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:34,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:34,985 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2024-11-14 04:31:34,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:31:34,987 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2024-11-14 04:31:34,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:34,989 INFO L225 Difference]: With dead ends: 38 [2024-11-14 04:31:34,989 INFO L226 Difference]: Without dead ends: 36 [2024-11-14 04:31:34,991 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:31:34,992 INFO L432 NwaCegarLoop]: 5 mSDtfsCounter, 49 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:34,995 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 47 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-11-14 04:31:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-11-14 04:31:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2024-11-14 04:31:35,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-14 04:31:35,010 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2024-11-14 04:31:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:35,010 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-14 04:31:35,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:35,011 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-14 04:31:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 04:31:35,011 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:35,011 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:35,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:35,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-14 04:31:35,212 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:35,212 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:35,213 INFO L85 PathProgramCache]: Analyzing trace with hash 636551890, now seen corresponding path program 3 times [2024-11-14 04:31:35,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:35,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700893717] [2024-11-14 04:31:35,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:35,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:35,623 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:35,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700893717] [2024-11-14 04:31:35,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700893717] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:35,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80283306] [2024-11-14 04:31:35,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:31:35,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:35,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:35,627 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:35,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 04:31:35,734 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:31:35,734 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:35,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-14 04:31:35,740 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:36,169 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:36,170 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:36,375 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 26 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:36,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80283306] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:36,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [340393342] [2024-11-14 04:31:36,378 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:31:36,378 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:36,378 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:36,378 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:36,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:36,918 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:37,298 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '713#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:31:37,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:37,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:37,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2024-11-14 04:31:37,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610922538] [2024-11-14 04:31:37,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:37,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-14 04:31:37,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:37,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-14 04:31:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2024-11-14 04:31:37,300 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:37,598 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-11-14 04:31:37,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 04:31:37,599 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 04:31:37,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:37,600 INFO L225 Difference]: With dead ends: 40 [2024-11-14 04:31:37,600 INFO L226 Difference]: Without dead ends: 22 [2024-11-14 04:31:37,601 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2024-11-14 04:31:37,602 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 40 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:37,602 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 62 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:31:37,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-11-14 04:31:37,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-11-14 04:31:37,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2024-11-14 04:31:37,612 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2024-11-14 04:31:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:37,612 INFO L471 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2024-11-14 04:31:37,613 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2024-11-14 04:31:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-14 04:31:37,613 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:37,613 INFO L215 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:37,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-14 04:31:37,814 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:37,814 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:37,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1827186410, now seen corresponding path program 4 times [2024-11-14 04:31:37,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:37,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82717537] [2024-11-14 04:31:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:37,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:37,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:39,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82717537] [2024-11-14 04:31:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82717537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829433267] [2024-11-14 04:31:39,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:31:39,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:39,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:39,165 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:39,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 04:31:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:39,301 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-14 04:31:39,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:39,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-14 04:31:39,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 102 [2024-11-14 04:31:39,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:39,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 72 [2024-11-14 04:31:39,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 75 [2024-11-14 04:31:39,823 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 29 [2024-11-14 04:31:40,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:40,003 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 187 [2024-11-14 04:31:40,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 165 treesize of output 173 [2024-11-14 04:31:40,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 152 [2024-11-14 04:31:40,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:40,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2024-11-14 04:31:40,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:40,277 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 14 [2024-11-14 04:31:40,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 141 treesize of output 123 [2024-11-14 04:31:40,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 113 [2024-11-14 04:31:40,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 28 [2024-11-14 04:31:40,404 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 74 [2024-11-14 04:31:40,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2024-11-14 04:31:40,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2024-11-14 04:31:40,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-14 04:31:40,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-14 04:31:41,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:41,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 74 [2024-11-14 04:31:41,411 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:41,412 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:41,837 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:41,837 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:31:42,371 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:42,371 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 210 [2024-11-14 04:31:42,594 INFO L349 Elim1Store]: treesize reduction 13, result has 86.6 percent of original size [2024-11-14 04:31:42,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 130 [2024-11-14 04:31:42,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 83 [2024-11-14 04:31:42,831 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:42,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 48 [2024-11-14 04:31:42,899 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 43 [2024-11-14 04:31:42,912 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:31:42,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:42,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 93 treesize of output 129 [2024-11-14 04:31:42,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 35 [2024-11-14 04:31:43,044 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 52 [2024-11-14 04:31:43,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 31 [2024-11-14 04:31:43,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2024-11-14 04:31:43,131 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 4 [2024-11-14 04:31:43,175 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:31:43,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 93 [2024-11-14 04:31:43,253 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:43,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829433267] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:43,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1675513469] [2024-11-14 04:31:43,256 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:31:43,256 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:43,256 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:43,256 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:43,257 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:43,716 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:44,234 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '964#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:31:44,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:44,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:44,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2024-11-14 04:31:44,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191365762] [2024-11-14 04:31:44,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:44,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-11-14 04:31:44,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:44,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-11-14 04:31:44,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1054, Unknown=0, NotChecked=0, Total=1190 [2024-11-14 04:31:44,237 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:47,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:47,308 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2024-11-14 04:31:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-14 04:31:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-14 04:31:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:47,309 INFO L225 Difference]: With dead ends: 54 [2024-11-14 04:31:47,309 INFO L226 Difference]: Without dead ends: 52 [2024-11-14 04:31:47,310 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=487, Invalid=2819, Unknown=0, NotChecked=0, Total=3306 [2024-11-14 04:31:47,311 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 146 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:47,311 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 68 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 292 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-11-14 04:31:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-14 04:31:47,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 31. [2024-11-14 04:31:47,320 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 04:31:47,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2024-11-14 04:31:47,321 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 21 [2024-11-14 04:31:47,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:47,321 INFO L471 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2024-11-14 04:31:47,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:47,321 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2024-11-14 04:31:47,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-11-14 04:31:47,321 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:47,322 INFO L215 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:47,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 04:31:47,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-14 04:31:47,522 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:47,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:47,523 INFO L85 PathProgramCache]: Analyzing trace with hash 710042809, now seen corresponding path program 5 times [2024-11-14 04:31:47,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:47,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828947507] [2024-11-14 04:31:47,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:47,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:48,832 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:48,832 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:48,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828947507] [2024-11-14 04:31:48,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828947507] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:48,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703153168] [2024-11-14 04:31:48,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:31:48,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:48,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:48,837 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:48,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 04:31:49,195 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-14 04:31:49,195 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:49,197 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-14 04:31:49,201 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:49,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:31:49,326 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-14 04:31:49,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-14 04:31:49,415 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 28 [2024-11-14 04:31:49,434 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 57 [2024-11-14 04:31:49,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 45 [2024-11-14 04:31:49,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 109 [2024-11-14 04:31:49,593 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2024-11-14 04:31:49,640 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 129 [2024-11-14 04:31:49,656 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:49,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 134 [2024-11-14 04:31:49,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 28 [2024-11-14 04:31:49,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 30 [2024-11-14 04:31:49,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-11-14 04:31:49,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-11-14 04:31:49,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 22 [2024-11-14 04:31:50,953 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:50,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 69 [2024-11-14 04:31:51,027 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:51,027 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:51,292 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,292 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:31:51,392 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 86 treesize of output 85 [2024-11-14 04:31:51,415 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 40 [2024-11-14 04:31:51,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:31:51,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 73 treesize of output 84 [2024-11-14 04:31:51,481 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:31:51,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 40 [2024-11-14 04:31:51,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 6 [2024-11-14 04:31:51,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:31:51,539 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:31:51,539 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 45 [2024-11-14 04:31:51,599 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:51,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703153168] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:51,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402817006] [2024-11-14 04:31:51,601 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:31:51,602 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:51,602 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:51,602 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:51,602 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:52,063 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:52,482 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1297#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:31:52,482 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:52,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 27 [2024-11-14 04:31:52,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554769458] [2024-11-14 04:31:52,482 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:52,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-14 04:31:52,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:52,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-14 04:31:52,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=871, Unknown=0, NotChecked=0, Total=992 [2024-11-14 04:31:52,484 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 04:31:55,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:55,714 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2024-11-14 04:31:55,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-14 04:31:55,715 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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) Word has length 24 [2024-11-14 04:31:55,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:55,716 INFO L225 Difference]: With dead ends: 71 [2024-11-14 04:31:55,716 INFO L226 Difference]: Without dead ends: 69 [2024-11-14 04:31:55,717 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=543, Invalid=3117, Unknown=0, NotChecked=0, Total=3660 [2024-11-14 04:31:55,718 INFO L432 NwaCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:55,718 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 56 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-11-14 04:31:55,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-11-14 04:31:55,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2024-11-14 04:31:55,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:55,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-14 04:31:55,734 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 24 [2024-11-14 04:31:55,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:55,734 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-14 04:31:55,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 04:31:55,734 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-14 04:31:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 04:31:55,735 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:55,735 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:55,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 04:31:55,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-14 04:31:55,935 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:55,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:55,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1436257450, now seen corresponding path program 6 times [2024-11-14 04:31:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:55,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998969356] [2024-11-14 04:31:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:55,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:55,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:31:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 78 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:56,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:31:56,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998969356] [2024-11-14 04:31:56,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998969356] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:31:56,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003702364] [2024-11-14 04:31:56,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:31:56,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:31:56,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:31:56,519 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:31:56,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 04:31:56,687 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:31:56,687 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:31:56,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 04:31:56,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:31:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:57,356 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:31:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:31:57,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003702364] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:31:57,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621315882] [2024-11-14 04:31:57,637 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:31:57,637 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:31:57,638 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:31:57,638 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:31:57,638 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:31:57,980 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:31:58,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1736#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:31:58,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:31:58,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:31:58,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 39 [2024-11-14 04:31:58,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796939328] [2024-11-14 04:31:58,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:31:58,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-11-14 04:31:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:31:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-11-14 04:31:58,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=1485, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 04:31:58,406 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:31:58,786 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2024-11-14 04:31:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 04:31:58,789 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 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 33 [2024-11-14 04:31:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:31:58,789 INFO L225 Difference]: With dead ends: 65 [2024-11-14 04:31:58,789 INFO L226 Difference]: Without dead ends: 35 [2024-11-14 04:31:58,790 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=564, Invalid=2088, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 04:31:58,791 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:31:58,791 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 84 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 04:31:58,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-11-14 04:31:58,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-11-14 04:31:58,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 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 04:31:58,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-11-14 04:31:58,810 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2024-11-14 04:31:58,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:31:58,810 INFO L471 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-11-14 04:31:58,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:31:58,810 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-11-14 04:31:58,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-14 04:31:58,811 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:31:58,811 INFO L215 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:31:58,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-14 04:31:59,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-11-14 04:31:59,012 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:31:59,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:31:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash -878482542, now seen corresponding path program 7 times [2024-11-14 04:31:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:31:59,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657925343] [2024-11-14 04:31:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:31:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:31:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:00,698 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:32:00,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657925343] [2024-11-14 04:32:00,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657925343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:32:00,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026491995] [2024-11-14 04:32:00,699 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:32:00,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:00,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:32:00,701 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:32:00,705 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 04:32:00,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:00,866 INFO L255 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 04:32:00,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:32:01,137 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-14 04:32:01,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 117 [2024-11-14 04:32:01,501 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 71 [2024-11-14 04:32:01,530 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:01,535 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:01,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2024-11-14 04:32:01,587 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:01,592 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:01,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2024-11-14 04:32:01,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 20 [2024-11-14 04:32:01,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2024-11-14 04:32:01,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 31 [2024-11-14 04:32:01,675 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 21 [2024-11-14 04:32:01,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 99 [2024-11-14 04:32:01,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 29 [2024-11-14 04:32:01,746 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-14 04:32:01,780 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-14 04:32:03,793 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:03,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 74 [2024-11-14 04:32:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:03,854 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:32:04,694 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:04,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:32:04,999 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:32:04,999 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-14 04:32:05,008 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-14 04:32:05,179 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:05,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026491995] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:32:05,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030694102] [2024-11-14 04:32:05,182 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:32:05,182 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:32:05,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:32:05,183 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:32:05,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:32:05,579 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:32:06,281 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2136#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:32:06,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:32:06,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:32:06,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 45 [2024-11-14 04:32:06,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788051242] [2024-11-14 04:32:06,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:32:06,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 04:32:06,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:32:06,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 04:32:06,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=2244, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 04:32:06,284 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:17,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:32:17,277 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2024-11-14 04:32:17,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-11-14 04:32:17,277 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 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 34 [2024-11-14 04:32:17,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:32:17,278 INFO L225 Difference]: With dead ends: 137 [2024-11-14 04:32:17,279 INFO L226 Difference]: Without dead ends: 135 [2024-11-14 04:32:17,283 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2810 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1304, Invalid=10038, Unknown=0, NotChecked=0, Total=11342 [2024-11-14 04:32:17,283 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 311 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:32:17,284 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 182 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2024-11-14 04:32:17,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-11-14 04:32:17,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 44. [2024-11-14 04:32:17,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:17,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2024-11-14 04:32:17,309 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 34 [2024-11-14 04:32:17,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:32:17,309 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2024-11-14 04:32:17,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 45 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:17,310 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2024-11-14 04:32:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-14 04:32:17,311 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:32:17,311 INFO L215 NwaCegarLoop]: trace histogram [10, 9, 9, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:32:17,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-14 04:32:17,515 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2024-11-14 04:32:17,515 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:32:17,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:32:17,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1632800579, now seen corresponding path program 8 times [2024-11-14 04:32:17,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:32:17,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687665292] [2024-11-14 04:32:17,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:32:17,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:32:17,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:18,978 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:18,978 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:32:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687665292] [2024-11-14 04:32:18,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687665292] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:32:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541091777] [2024-11-14 04:32:18,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:32:18,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:18,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:32:18,982 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:32:18,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 04:32:20,152 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-11-14 04:32:20,153 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:32:20,156 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-14 04:32:20,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:32:20,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:20,346 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-14 04:32:20,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 133 treesize of output 131 [2024-11-14 04:32:20,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 31 [2024-11-14 04:32:20,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2024-11-14 04:32:20,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 142 treesize of output 186 [2024-11-14 04:32:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:20,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 242 [2024-11-14 04:32:20,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:20,974 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:20,975 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 7 [2024-11-14 04:32:20,983 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:20,984 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:20,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 7 [2024-11-14 04:32:21,020 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:21,020 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:21,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 7 [2024-11-14 04:32:21,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:21,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:21,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:21,061 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:21,061 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 16 [2024-11-14 04:32:21,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:21,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:21,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:32:21,124 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:32:21,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 16 [2024-11-14 04:32:21,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 31 [2024-11-14 04:32:21,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 15 [2024-11-14 04:32:21,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2024-11-14 04:32:21,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 48 [2024-11-14 04:32:23,885 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:23,885 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 198 treesize of output 96 [2024-11-14 04:32:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:23,929 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:32:24,155 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:24,156 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:32:24,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 67 [2024-11-14 04:32:24,279 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:32:24,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 59 [2024-11-14 04:32:24,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-14 04:32:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541091777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:32:24,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [528836033] [2024-11-14 04:32:24,379 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:32:24,379 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:32:24,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:32:24,380 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:32:24,380 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:32:24,631 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:32:25,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2758#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:32:25,094 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:32:25,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:32:25,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 17] total 38 [2024-11-14 04:32:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427792239] [2024-11-14 04:32:25,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:32:25,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-14 04:32:25,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:32:25,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-14 04:32:25,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1621, Unknown=0, NotChecked=0, Total=1806 [2024-11-14 04:32:25,096 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:32:36,841 INFO L93 Difference]: Finished difference Result 166 states and 179 transitions. [2024-11-14 04:32:36,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2024-11-14 04:32:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 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 37 [2024-11-14 04:32:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:32:36,843 INFO L225 Difference]: With dead ends: 166 [2024-11-14 04:32:36,843 INFO L226 Difference]: Without dead ends: 164 [2024-11-14 04:32:36,846 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1382, Invalid=10390, Unknown=0, NotChecked=0, Total=11772 [2024-11-14 04:32:36,847 INFO L432 NwaCegarLoop]: 7 mSDtfsCounter, 390 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-11-14 04:32:36,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [390 Valid, 136 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-11-14 04:32:36,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-11-14 04:32:36,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 47. [2024-11-14 04:32:36,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:36,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-11-14 04:32:36,880 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 37 [2024-11-14 04:32:36,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:32:36,880 INFO L471 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-11-14 04:32:36,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1578947368421053) internal successors, (82), 38 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-11-14 04:32:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-14 04:32:36,881 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:32:36,881 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 1, 1, 1, 1, 1, 1] [2024-11-14 04:32:36,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-14 04:32:37,082 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:37,082 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:32:37,082 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:32:37,082 INFO L85 PathProgramCache]: Analyzing trace with hash 786213842, now seen corresponding path program 9 times [2024-11-14 04:32:37,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:32:37,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810054533] [2024-11-14 04:32:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:32:37,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:32:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 188 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:37,919 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:32:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810054533] [2024-11-14 04:32:37,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810054533] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:32:37,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958073977] [2024-11-14 04:32:37,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:32:37,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:37,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:32:37,921 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:32:37,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 04:32:38,123 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:32:38,123 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:32:38,125 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 04:32:38,128 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:32:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 222 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:39,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:32:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 222 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:39,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958073977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:32:39,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1134538378] [2024-11-14 04:32:39,723 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:32:39,724 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:32:39,724 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:32:39,724 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:32:39,724 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:32:40,094 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:32:40,623 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3512#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:32:40,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:32:40,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:32:40,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 19] total 54 [2024-11-14 04:32:40,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813399292] [2024-11-14 04:32:40,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:32:40,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-14 04:32:40,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:32:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-14 04:32:40,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=2668, Unknown=0, NotChecked=0, Total=3422 [2024-11-14 04:32:40,626 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:32:41,281 INFO L93 Difference]: Finished difference Result 90 states and 92 transitions. [2024-11-14 04:32:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-14 04:32:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2024-11-14 04:32:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:32:41,283 INFO L225 Difference]: With dead ends: 90 [2024-11-14 04:32:41,283 INFO L226 Difference]: Without dead ends: 48 [2024-11-14 04:32:41,284 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=999, Invalid=3693, Unknown=0, NotChecked=0, Total=4692 [2024-11-14 04:32:41,285 INFO L432 NwaCegarLoop]: 15 mSDtfsCounter, 68 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:32:41,285 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 116 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 04:32:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-14 04:32:41,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-14 04:32:41,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:41,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-11-14 04:32:41,329 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 46 [2024-11-14 04:32:41,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:32:41,329 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-11-14 04:32:41,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.425925925925926) internal successors, (131), 54 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:32:41,330 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-11-14 04:32:41,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-11-14 04:32:41,330 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:32:41,330 INFO L215 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:32:41,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 04:32:41,531 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:41,531 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:32:41,531 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:32:41,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1303115030, now seen corresponding path program 10 times [2024-11-14 04:32:41,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:32:41,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064512632] [2024-11-14 04:32:41,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:32:41,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:32:41,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:43,597 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:43,597 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:32:43,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064512632] [2024-11-14 04:32:43,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064512632] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:32:43,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981515176] [2024-11-14 04:32:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:32:43,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:32:43,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:32:43,601 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:32:43,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 04:32:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:32:43,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-14 04:32:43,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:32:44,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-14 04:32:44,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 67 [2024-11-14 04:32:44,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2024-11-14 04:32:44,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 04:32:44,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:32:44,515 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 57 [2024-11-14 04:32:44,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 04:32:44,556 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:32:44,583 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:32:44,627 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:44,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 7 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 166 [2024-11-14 04:32:44,664 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-11-14 04:32:44,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-14 04:32:44,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2024-11-14 04:32:44,880 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 30 [2024-11-14 04:32:44,884 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 20 [2024-11-14 04:32:44,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 196 treesize of output 204 [2024-11-14 04:32:44,925 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 195 treesize of output 173 [2024-11-14 04:32:45,162 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 111 [2024-11-14 04:32:45,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-14 04:32:45,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 1 [2024-11-14 04:32:45,202 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-14 04:32:45,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 17 [2024-11-14 04:32:49,855 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:49,855 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 110 [2024-11-14 04:32:49,941 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:49,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:32:50,992 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:50,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:32:51,464 INFO L349 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2024-11-14 04:32:51,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 148 [2024-11-14 04:32:51,493 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 4 [2024-11-14 04:32:51,544 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 4 [2024-11-14 04:32:51,632 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:32:51,686 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:51,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 165 [2024-11-14 04:32:51,738 INFO L349 Elim1Store]: treesize reduction 13, result has 79.0 percent of original size [2024-11-14 04:32:51,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 78 [2024-11-14 04:32:51,887 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:51,888 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2024-11-14 04:32:51,945 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:32:51,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2024-11-14 04:32:52,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 33 [2024-11-14 04:32:52,048 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:32:52,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 92 treesize of output 78 [2024-11-14 04:32:52,079 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2024-11-14 04:32:52,093 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:32:52,093 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 79 [2024-11-14 04:32:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:32:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981515176] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:32:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1264218844] [2024-11-14 04:32:52,317 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:32:52,317 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:32:52,318 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:32:52,318 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:32:52,318 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:32:52,670 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:32:53,374 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4061#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:32:53,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:32:53,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:32:53,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 21] total 60 [2024-11-14 04:32:53,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150783352] [2024-11-14 04:32:53,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:32:53,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 04:32:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:32:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 04:32:53,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 04:32:53,377 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 60 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:25,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:33:25,841 INFO L93 Difference]: Finished difference Result 265 states and 281 transitions. [2024-11-14 04:33:25,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-11-14 04:33:25,842 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 states have internal predecessors, (136), 0 states have call successors, (0), 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 47 [2024-11-14 04:33:25,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:33:25,843 INFO L225 Difference]: With dead ends: 265 [2024-11-14 04:33:25,843 INFO L226 Difference]: Without dead ends: 263 [2024-11-14 04:33:25,847 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8602 ImplicationChecksByTransitivity, 24.2s TimeCoverageRelationStatistics Valid=2538, Invalid=25854, Unknown=0, NotChecked=0, Total=28392 [2024-11-14 04:33:25,847 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 582 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2024-11-14 04:33:25,847 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [582 Valid, 238 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2024-11-14 04:33:25,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-11-14 04:33:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 57. [2024-11-14 04:33:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2024-11-14 04:33:25,902 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 47 [2024-11-14 04:33:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:33:25,902 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2024-11-14 04:33:25,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:33:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2024-11-14 04:33:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 04:33:25,903 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:33:25,903 INFO L215 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:33:25,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 04:33:26,104 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:26,104 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:33:26,104 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:33:26,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1104656199, now seen corresponding path program 11 times [2024-11-14 04:33:26,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:33:26,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401435997] [2024-11-14 04:33:26,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:33:26,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:33:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:33:28,516 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:33:28,516 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:33:28,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401435997] [2024-11-14 04:33:28,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401435997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:33:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409599130] [2024-11-14 04:33:28,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:33:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:33:28,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:33:28,519 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:33:28,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 04:33:37,745 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-11-14 04:33:37,745 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:33:37,754 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-11-14 04:33:37,759 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:33:37,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:33:37,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 44 [2024-11-14 04:33:38,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 134 [2024-11-14 04:33:38,142 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 149 [2024-11-14 04:33:38,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 37 [2024-11-14 04:33:38,243 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:33:38,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:33:38,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 22 [2024-11-14 04:33:38,268 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:33:38,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:33:38,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 28 [2024-11-14 04:33:38,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-14 04:33:38,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 54 [2024-11-14 04:33:38,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 37 [2024-11-14 04:33:38,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 21 [2024-11-14 04:33:40,718 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:33:40,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 66 [2024-11-14 04:33:40,796 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:33:40,796 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:33:41,988 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:33:41,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:33:42,243 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:33:42,243 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 27 [2024-11-14 04:33:42,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-14 04:33:42,472 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:33:42,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409599130] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:33:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [597216479] [2024-11-14 04:33:42,474 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:33:42,474 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:33:42,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:33:42,475 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:33:42,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:33:42,821 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:33:43,615 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5072#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:33:43,615 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:33:43,615 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:33:43,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 63 [2024-11-14 04:33:43,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654943541] [2024-11-14 04:33:43,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:33:43,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-11-14 04:33:43,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:33:43,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-11-14 04:33:43,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=4255, Unknown=0, NotChecked=0, Total=4556 [2024-11-14 04:33:43,618 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:34:20,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:34:20,777 INFO L93 Difference]: Finished difference Result 303 states and 320 transitions. [2024-11-14 04:34:20,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-11-14 04:34:20,778 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 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 04:34:20,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:34:20,779 INFO L225 Difference]: With dead ends: 303 [2024-11-14 04:34:20,779 INFO L226 Difference]: Without dead ends: 301 [2024-11-14 04:34:20,784 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9292 ImplicationChecksByTransitivity, 26.3s TimeCoverageRelationStatistics Valid=2840, Invalid=31942, Unknown=0, NotChecked=0, Total=34782 [2024-11-14 04:34:20,785 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 542 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 2216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:34:20,785 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 272 Invalid, 2216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2024-11-14 04:34:20,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2024-11-14 04:34:20,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 57. [2024-11-14 04:34:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:34:20,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-11-14 04:34:20,828 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 50 [2024-11-14 04:34:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:34:20,828 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-11-14 04:34:20,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.3015873015873014) internal successors, (145), 63 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:34:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-11-14 04:34:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-14 04:34:20,830 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:34:20,830 INFO L215 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:34:20,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 04:34:21,031 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:34:21,031 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:34:21,031 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:34:21,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1232796569, now seen corresponding path program 12 times [2024-11-14 04:34:21,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:34:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814557944] [2024-11-14 04:34:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:34:21,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:34:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:34:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:34:23,000 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:34:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814557944] [2024-11-14 04:34:23,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814557944] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:34:23,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828640115] [2024-11-14 04:34:23,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:34:23,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:34:23,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:34:23,002 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:34:23,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 04:34:23,267 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:34:23,267 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:34:23,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-14 04:34:23,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:34:23,507 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:34:23,517 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-14 04:34:25,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 53 [2024-11-14 04:34:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:34:25,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:34:27,372 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:34:27,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:34:27,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 41 [2024-11-14 04:34:27,421 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:34:27,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-14 04:34:27,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-14 04:34:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 355 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:34:27,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828640115] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:34:27,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2126630758] [2024-11-14 04:34:27,701 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:34:27,702 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:34:27,702 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:34:27,702 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:34:27,702 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:34:28,184 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:34:29,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6208#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3))' at error location [2024-11-14 04:34:29,042 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:34:29,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:34:29,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 69 [2024-11-14 04:34:29,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791241962] [2024-11-14 04:34:29,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:34:29,043 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-11-14 04:34:29,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:34:29,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-11-14 04:34:29,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=5114, Unknown=0, NotChecked=0, Total=5402 [2024-11-14 04:34:29,044 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 69 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 04:35:09,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:35:09,582 INFO L93 Difference]: Finished difference Result 396 states and 415 transitions. [2024-11-14 04:35:09,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2024-11-14 04:35:09,583 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 69 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) Word has length 56 [2024-11-14 04:35:09,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:35:09,585 INFO L225 Difference]: With dead ends: 396 [2024-11-14 04:35:09,585 INFO L226 Difference]: Without dead ends: 394 [2024-11-14 04:35:09,588 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16292 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=3714, Invalid=47588, Unknown=0, NotChecked=0, Total=51302 [2024-11-14 04:35:09,589 INFO L432 NwaCegarLoop]: 8 mSDtfsCounter, 845 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 2784 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 845 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 3144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 2784 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.0s IncrementalHoareTripleChecker+Time [2024-11-14 04:35:09,589 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [845 Valid, 362 Invalid, 3144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 2784 Invalid, 0 Unknown, 0 Unchecked, 19.0s Time] [2024-11-14 04:35:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2024-11-14 04:35:09,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 60. [2024-11-14 04:35:09,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-11-14 04:35:09,662 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2024-11-14 04:35:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:35:09,662 INFO L471 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-11-14 04:35:09,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.36231884057971) internal successors, (163), 69 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 04:35:09,663 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-11-14 04:35:09,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-11-14 04:35:09,664 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:35:09,664 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 1, 1, 1, 1, 1, 1] [2024-11-14 04:35:09,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 04:35:09,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 04:35:09,864 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:35:09,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:35:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash -17887402, now seen corresponding path program 13 times [2024-11-14 04:35:09,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:35:09,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968225426] [2024-11-14 04:35:09,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:35:09,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:35:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 346 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:35:11,148 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:35:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968225426] [2024-11-14 04:35:11,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968225426] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:35:11,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150313391] [2024-11-14 04:35:11,149 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:35:11,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:35:11,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:35:11,151 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:35:11,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 04:35:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:11,445 INFO L255 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-14 04:35:11,447 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:35:13,111 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 392 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:35:13,111 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:35:14,066 INFO L134 CoverageAnalysis]: Checked inductivity of 402 backedges. 392 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:35:14,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150313391] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:35:14,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [650057302] [2024-11-14 04:35:14,068 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:35:14,068 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:35:14,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:35:14,069 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:35:14,069 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:35:14,396 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:35:15,039 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7560#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:35:15,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:35:15,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:35:15,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 24] total 70 [2024-11-14 04:35:15,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194456957] [2024-11-14 04:35:15,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:35:15,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2024-11-14 04:35:15,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:35:15,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2024-11-14 04:35:15,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1239, Invalid=4311, Unknown=0, NotChecked=0, Total=5550 [2024-11-14 04:35:15,042 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 70 states, 70 states have (on average 2.442857142857143) internal successors, (171), 70 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 04:35:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:35:15,931 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2024-11-14 04:35:15,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 04:35:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.442857142857143) internal successors, (171), 70 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 59 [2024-11-14 04:35:15,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:35:15,933 INFO L225 Difference]: With dead ends: 115 [2024-11-14 04:35:15,933 INFO L226 Difference]: Without dead ends: 61 [2024-11-14 04:35:15,934 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3024 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1604, Invalid=5878, Unknown=0, NotChecked=0, Total=7482 [2024-11-14 04:35:15,935 INFO L432 NwaCegarLoop]: 19 mSDtfsCounter, 102 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:35:15,935 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 175 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:35:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-11-14 04:35:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2024-11-14 04:35:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:35:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2024-11-14 04:35:15,980 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2024-11-14 04:35:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:35:15,980 INFO L471 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2024-11-14 04:35:15,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.442857142857143) internal successors, (171), 70 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 04:35:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2024-11-14 04:35:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-14 04:35:15,981 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:35:15,981 INFO L215 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:35:16,000 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 04:35:16,182 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 04:35:16,182 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:35:16,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:35:16,182 INFO L85 PathProgramCache]: Analyzing trace with hash -437783406, now seen corresponding path program 14 times [2024-11-14 04:35:16,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:35:16,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648769508] [2024-11-14 04:35:16,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:35:16,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:35:16,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:35:19,169 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:35:19,170 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:35:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648769508] [2024-11-14 04:35:19,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648769508] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:35:19,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938839881] [2024-11-14 04:35:19,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:35:19,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:35:19,170 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:35:19,172 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:35:19,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 04:37:20,693 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2024-11-14 04:37:20,693 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:37:20,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-11-14 04:37:20,736 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:37:21,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 42 [2024-11-14 04:37:21,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 77 [2024-11-14 04:37:21,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2024-11-14 04:37:21,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-14 04:37:21,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 108 [2024-11-14 04:37:21,740 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 64 [2024-11-14 04:37:22,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 21 [2024-11-14 04:37:22,062 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-14 04:37:22,083 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 37 [2024-11-14 04:37:22,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 22 [2024-11-14 04:37:22,173 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:37:22,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 135 treesize of output 192 [2024-11-14 04:37:22,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 82 [2024-11-14 04:37:22,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2024-11-14 04:37:22,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2024-11-14 04:37:22,425 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 35 [2024-11-14 04:37:22,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2024-11-14 04:37:22,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 95 [2024-11-14 04:37:22,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 67 [2024-11-14 04:37:29,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:37:29,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 212 treesize of output 110 [2024-11-14 04:37:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:37:29,991 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:37:31,961 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:37:31,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:37:32,407 INFO L349 Elim1Store]: treesize reduction 11, result has 79.6 percent of original size [2024-11-14 04:37:32,407 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 148 [2024-11-14 04:37:32,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 4 [2024-11-14 04:37:32,589 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 9 [2024-11-14 04:37:32,612 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:37:32,612 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 140 treesize of output 165 [2024-11-14 04:37:32,652 INFO L349 Elim1Store]: treesize reduction 13, result has 79.0 percent of original size [2024-11-14 04:37:32,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 78 [2024-11-14 04:37:32,770 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:37:32,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2024-11-14 04:37:32,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:37:32,846 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-14 04:37:32,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 62 [2024-11-14 04:37:32,907 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:37:32,908 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 82 [2024-11-14 04:37:33,360 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 0 proven. 407 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:37:33,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938839881] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:37:33,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [909854797] [2024-11-14 04:37:33,361 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:37:33,361 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:37:33,363 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:37:33,363 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:37:33,363 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:37:33,671 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:37:34,731 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8258#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:37:34,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:37:34,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:37:34,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 26] total 75 [2024-11-14 04:37:34,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845344708] [2024-11-14 04:37:34,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:37:34,732 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-11-14 04:37:34,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:37:34,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-11-14 04:37:34,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=5963, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 04:37:34,734 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 75 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 04:38:36,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:38:36,353 INFO L93 Difference]: Finished difference Result 439 states and 460 transitions. [2024-11-14 04:38:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2024-11-14 04:38:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 75 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) Word has length 60 [2024-11-14 04:38:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:38:36,356 INFO L225 Difference]: With dead ends: 439 [2024-11-14 04:38:36,356 INFO L226 Difference]: Without dead ends: 437 [2024-11-14 04:38:36,359 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19305 ImplicationChecksByTransitivity, 48.5s TimeCoverageRelationStatistics Valid=4534, Invalid=57218, Unknown=0, NotChecked=0, Total=61752 [2024-11-14 04:38:36,360 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1031 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 2927 mSolverCounterSat, 408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1031 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 408 IncrementalHoareTripleChecker+Valid, 2927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.1s IncrementalHoareTripleChecker+Time [2024-11-14 04:38:36,360 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1031 Valid, 415 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [408 Valid, 2927 Invalid, 0 Unknown, 0 Unchecked, 19.1s Time] [2024-11-14 04:38:36,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2024-11-14 04:38:36,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 70. [2024-11-14 04:38:36,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:38:36,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2024-11-14 04:38:36,435 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 60 [2024-11-14 04:38:36,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:38:36,435 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2024-11-14 04:38:36,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.3333333333333335) internal successors, (175), 75 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 04:38:36,436 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2024-11-14 04:38:36,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-11-14 04:38:36,436 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:38:36,437 INFO L215 NwaCegarLoop]: trace histogram [18, 17, 17, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:38:36,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 04:38:36,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-14 04:38:36,638 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:38:36,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:38:36,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1815103421, now seen corresponding path program 15 times [2024-11-14 04:38:36,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:38:36,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39275447] [2024-11-14 04:38:36,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:38:36,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:38:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:38:39,532 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:38:39,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:38:39,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39275447] [2024-11-14 04:38:39,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39275447] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:38:39,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378585807] [2024-11-14 04:38:39,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:38:39,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:38:39,533 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:38:39,536 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:38:39,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 04:38:39,893 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:38:39,894 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:38:39,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-11-14 04:38:39,904 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:38:40,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:38:40,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-14 04:38:40,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 55 [2024-11-14 04:38:40,417 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2024-11-14 04:38:40,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:38:40,486 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 57 [2024-11-14 04:38:40,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2024-11-14 04:38:40,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:38:40,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-14 04:38:40,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 67 [2024-11-14 04:38:40,587 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-11-14 04:38:40,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 36 [2024-11-14 04:38:40,614 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 26 [2024-11-14 04:38:44,077 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:38:44,077 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 97 treesize of output 65 [2024-11-14 04:38:44,172 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:38:44,172 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:38:44,683 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:38:44,683 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:38:44,842 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:38:44,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 79 [2024-11-14 04:38:44,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2024-11-14 04:38:44,891 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:38:44,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 83 [2024-11-14 04:38:44,913 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:38:44,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 40 [2024-11-14 04:38:44,942 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 6 [2024-11-14 04:38:44,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:38:44,976 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:38:44,976 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 44 [2024-11-14 04:38:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:38:45,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378585807] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:38:45,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [626418558] [2024-11-14 04:38:45,296 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:38:45,296 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:38:45,296 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:38:45,297 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:38:45,297 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:38:45,644 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:38:46,506 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '9728#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:38:46,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:38:46,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:38:46,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 27] total 60 [2024-11-14 04:38:46,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822495086] [2024-11-14 04:38:46,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:38:46,508 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 04:38:46,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:38:46,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 04:38:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=3907, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 04:38:46,509 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 60 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:39,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:39:39,395 INFO L93 Difference]: Finished difference Result 488 states and 509 transitions. [2024-11-14 04:39:39,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2024-11-14 04:39:39,396 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 states have internal predecessors, (136), 0 states have call successors, (0), 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 63 [2024-11-14 04:39:39,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:39:39,398 INFO L225 Difference]: With dead ends: 488 [2024-11-14 04:39:39,398 INFO L226 Difference]: Without dead ends: 486 [2024-11-14 04:39:39,402 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21296 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=4579, Invalid=59683, Unknown=0, NotChecked=0, Total=64262 [2024-11-14 04:39:39,403 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1108 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 442 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1108 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 442 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:39:39,403 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1108 Valid, 385 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [442 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 21.3s Time] [2024-11-14 04:39:39,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2024-11-14 04:39:39,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 70. [2024-11-14 04:39:39,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:39,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2024-11-14 04:39:39,472 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 63 [2024-11-14 04:39:39,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:39:39,472 INFO L471 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2024-11-14 04:39:39,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.2666666666666666) internal successors, (136), 60 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:39:39,473 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2024-11-14 04:39:39,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-11-14 04:39:39,473 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:39:39,473 INFO L215 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:39:39,491 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-14 04:39:39,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-14 04:39:39,674 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:39:39,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:39:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1054910365, now seen corresponding path program 16 times [2024-11-14 04:39:39,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:39:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269177627] [2024-11-14 04:39:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:39:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:39:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:39:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:39:41,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:39:41,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269177627] [2024-11-14 04:39:41,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269177627] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:39:41,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690697797] [2024-11-14 04:39:41,881 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:39:41,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:39:41,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:39:41,883 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:39:41,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-14 04:39:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:39:42,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-11-14 04:39:42,250 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:39:42,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 40 [2024-11-14 04:39:42,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-14 04:39:44,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-14 04:39:44,728 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:39:44,728 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:39:46,742 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:39:46,742 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:39:46,799 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:39:46,800 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-14 04:39:47,215 INFO L134 CoverageAnalysis]: Checked inductivity of 566 backedges. 0 proven. 566 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:39:47,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690697797] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:39:47,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [524619185] [2024-11-14 04:39:47,217 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:39:47,217 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:39:47,218 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:39:47,218 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:39:47,218 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:39:47,504 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:39:48,497 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11365#(and (<= 1 ~CELLCOUNT~0) (<= 0 |ULTIMATE.start_main_~i~0#1|))' at error location [2024-11-14 04:39:48,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:39:48,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:39:48,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 29] total 84 [2024-11-14 04:39:48,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004296855] [2024-11-14 04:39:48,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:39:48,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-14 04:39:48,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:39:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-14 04:39:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=7477, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 04:39:48,500 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 84 states, 84 states have (on average 2.4047619047619047) internal successors, (202), 84 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:41:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:01,987 INFO L93 Difference]: Finished difference Result 606 states and 630 transitions. [2024-11-14 04:41:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 234 states. [2024-11-14 04:41:01,988 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.4047619047619047) internal successors, (202), 84 states have internal predecessors, (202), 0 states have call successors, (0), 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 69 [2024-11-14 04:41:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:01,991 INFO L225 Difference]: With dead ends: 606 [2024-11-14 04:41:01,991 INFO L226 Difference]: Without dead ends: 604 [2024-11-14 04:41:01,995 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30261 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=6659, Invalid=96061, Unknown=0, NotChecked=0, Total=102720 [2024-11-14 04:41:01,995 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1193 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 4628 mSolverCounterSat, 551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1193 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 5179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 551 IncrementalHoareTripleChecker+Valid, 4628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.5s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:01,996 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1193 Valid, 547 Invalid, 5179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [551 Valid, 4628 Invalid, 0 Unknown, 0 Unchecked, 29.5s Time] [2024-11-14 04:41:01,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2024-11-14 04:41:02,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 73. [2024-11-14 04:41:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:41:02,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-11-14 04:41:02,061 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2024-11-14 04:41:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:02,061 INFO L471 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-11-14 04:41:02,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.4047619047619047) internal successors, (202), 84 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:41:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-11-14 04:41:02,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-11-14 04:41:02,061 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:02,062 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 1, 1, 1, 1, 1, 1] [2024-11-14 04:41:02,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-14 04:41:02,262 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-14 04:41:02,262 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:41:02,262 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:02,262 INFO L85 PathProgramCache]: Analyzing trace with hash 563852498, now seen corresponding path program 17 times [2024-11-14 04:41:02,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:02,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225536579] [2024-11-14 04:41:02,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:02,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:02,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:03,212 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 552 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:03,213 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225536579] [2024-11-14 04:41:03,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225536579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:03,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506783595] [2024-11-14 04:41:03,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:41:03,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:03,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:03,215 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:03,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-14 04:41:35,799 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2024-11-14 04:41:35,799 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:41:35,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-14 04:41:35,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:37,357 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 610 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:37,357 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 610 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:38,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506783595] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:41:38,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [990974760] [2024-11-14 04:41:38,354 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:41:38,355 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:41:38,355 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:41:38,355 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:41:38,355 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:41:38,700 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:41:39,313 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13269#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3))' at error location [2024-11-14 04:41:39,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:41:39,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:41:39,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 29] total 84 [2024-11-14 04:41:39,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285955543] [2024-11-14 04:41:39,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:41:39,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-11-14 04:41:39,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:41:39,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-11-14 04:41:39,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1734, Invalid=6098, Unknown=0, NotChecked=0, Total=7832 [2024-11-14 04:41:39,315 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 84 states, 84 states have (on average 2.488095238095238) internal successors, (209), 84 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 04:41:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:41:40,340 INFO L93 Difference]: Finished difference Result 140 states and 142 transitions. [2024-11-14 04:41:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-14 04:41:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.488095238095238) internal successors, (209), 84 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) Word has length 72 [2024-11-14 04:41:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:41:40,341 INFO L225 Difference]: With dead ends: 140 [2024-11-14 04:41:40,341 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 04:41:40,342 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4341 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2199, Invalid=8307, Unknown=0, NotChecked=0, Total=10506 [2024-11-14 04:41:40,342 INFO L432 NwaCegarLoop]: 23 mSDtfsCounter, 88 mSDsluCounter, 256 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 600 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-14 04:41:40,342 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 279 Invalid, 600 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-14 04:41:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 04:41:40,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-14 04:41:40,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 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 04:41:40,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2024-11-14 04:41:40,408 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2024-11-14 04:41:40,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:41:40,408 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2024-11-14 04:41:40,408 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.488095238095238) internal successors, (209), 84 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 04:41:40,408 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2024-11-14 04:41:40,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 04:41:40,408 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:41:40,408 INFO L215 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:41:40,431 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-14 04:41:40,609 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:40,609 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:41:40,609 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:41:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1560661738, now seen corresponding path program 18 times [2024-11-14 04:41:40,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:41:40,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839147910] [2024-11-14 04:41:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:41:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:41:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:41:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:43,122 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:41:43,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839147910] [2024-11-14 04:41:43,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839147910] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:41:43,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079887082] [2024-11-14 04:41:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 04:41:43,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:41:43,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:41:43,124 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:41:43,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-14 04:41:43,491 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 04:41:43,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 04:41:43,495 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 78 conjuncts are in the unsatisfiable core [2024-11-14 04:41:43,498 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:41:43,956 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-14 04:41:44,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,212 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 7 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 158 treesize of output 196 [2024-11-14 04:41:44,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 39 [2024-11-14 04:41:44,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-14 04:41:44,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 181 treesize of output 224 [2024-11-14 04:41:44,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 8 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 180 [2024-11-14 04:41:44,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,438 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,439 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,442 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 12 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2024-11-14 04:41:44,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,508 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2024-11-14 04:41:44,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,602 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,603 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 4 select indices, 4 select index equivalence classes, 13 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 59 [2024-11-14 04:41:44,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 53 [2024-11-14 04:41:44,702 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:41:44,703 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 53 [2024-11-14 04:41:44,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 53 [2024-11-14 04:41:44,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 5 [2024-11-14 04:41:44,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:44,973 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 7 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 20 [2024-11-14 04:41:45,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-14 04:41:45,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2024-11-14 04:41:54,246 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:54,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 214 treesize of output 122 [2024-11-14 04:41:54,339 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:41:54,339 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:41:56,801 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:56,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:41:57,517 INFO L349 Elim1Store]: treesize reduction 33, result has 78.1 percent of original size [2024-11-14 04:41:57,518 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 293 treesize of output 525 [2024-11-14 04:41:58,007 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:58,007 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 74 treesize of output 48 [2024-11-14 04:41:58,064 INFO L349 Elim1Store]: treesize reduction 11, result has 85.5 percent of original size [2024-11-14 04:41:58,064 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 125 treesize of output 161 [2024-11-14 04:41:58,116 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:58,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 22 [2024-11-14 04:41:58,155 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:41:58,259 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:58,259 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 353 treesize of output 433 [2024-11-14 04:41:58,383 INFO L349 Elim1Store]: treesize reduction 39, result has 77.7 percent of original size [2024-11-14 04:41:58,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 12 case distinctions, treesize of input 118 treesize of output 392 [2024-11-14 04:41:58,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:58,967 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 18 [2024-11-14 04:41:59,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 9 [2024-11-14 04:41:59,112 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 63 [2024-11-14 04:41:59,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 9 [2024-11-14 04:41:59,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,203 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 9 [2024-11-14 04:41:59,222 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 269 treesize of output 252 [2024-11-14 04:41:59,250 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:59,251 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 189 treesize of output 182 [2024-11-14 04:41:59,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,282 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:59,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 204 treesize of output 201 [2024-11-14 04:41:59,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 18 [2024-11-14 04:41:59,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 9 [2024-11-14 04:41:59,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,499 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 63 [2024-11-14 04:41:59,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:41:59,516 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 9 [2024-11-14 04:41:59,606 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:59,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 245 treesize of output 241 [2024-11-14 04:41:59,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 6 [2024-11-14 04:41:59,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2024-11-14 04:41:59,813 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:41:59,845 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 13 [2024-11-14 04:41:59,869 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 22 [2024-11-14 04:41:59,922 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:41:59,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 35 [2024-11-14 04:41:59,985 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:41:59,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 366 treesize of output 165 [2024-11-14 04:42:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 0 proven. 631 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:42:00,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079887082] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:42:00,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925125] [2024-11-14 04:42:00,459 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:42:00,459 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:42:00,459 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:42:00,459 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:42:00,459 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:42:00,783 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:42:01,684 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14116#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3))' at error location [2024-11-14 04:42:01,684 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:42:01,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:42:01,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 31] total 90 [2024-11-14 04:42:01,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310848317] [2024-11-14 04:42:01,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:42:01,684 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-11-14 04:42:01,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:42:01,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-11-14 04:42:01,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=8531, Unknown=0, NotChecked=0, Total=8930 [2024-11-14 04:42:01,686 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 90 states, 90 states have (on average 2.3777777777777778) internal successors, (214), 90 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:43:34,236 INFO L93 Difference]: Finished difference Result 660 states and 686 transitions. [2024-11-14 04:43:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2024-11-14 04:43:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.3777777777777778) internal successors, (214), 90 states have internal predecessors, (214), 0 states have call successors, (0), 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 73 [2024-11-14 04:43:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:43:34,239 INFO L225 Difference]: With dead ends: 660 [2024-11-14 04:43:34,239 INFO L226 Difference]: Without dead ends: 658 [2024-11-14 04:43:34,242 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39351 ImplicationChecksByTransitivity, 70.7s TimeCoverageRelationStatistics Valid=7569, Invalid=112493, Unknown=0, NotChecked=0, Total=120062 [2024-11-14 04:43:34,242 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1471 mSDsluCounter, 602 mSDsCounter, 0 mSdLazyCounter, 4682 mSolverCounterSat, 633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1471 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 5315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 633 IncrementalHoareTripleChecker+Valid, 4682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.2s IncrementalHoareTripleChecker+Time [2024-11-14 04:43:34,242 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1471 Valid, 612 Invalid, 5315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [633 Valid, 4682 Invalid, 0 Unknown, 0 Unchecked, 28.2s Time] [2024-11-14 04:43:34,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2024-11-14 04:43:34,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 86. [2024-11-14 04:43:34,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.035294117647059) internal successors, (88), 85 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 04:43:34,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2024-11-14 04:43:34,325 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 73 [2024-11-14 04:43:34,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:43:34,325 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2024-11-14 04:43:34,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.3777777777777778) internal successors, (214), 90 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:43:34,326 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2024-11-14 04:43:34,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-11-14 04:43:34,326 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:43:34,326 INFO L215 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:43:34,341 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-14 04:43:34,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:34,527 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:43:34,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:43:34,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1793223222, now seen corresponding path program 19 times [2024-11-14 04:43:34,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:43:34,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949326102] [2024-11-14 04:43:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:43:34,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:43:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:43:36,895 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:43:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949326102] [2024-11-14 04:43:36,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949326102] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:43:36,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564171370] [2024-11-14 04:43:36,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 04:43:36,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:43:36,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:43:36,898 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:43:36,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-14 04:43:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:43:37,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 77 conjuncts are in the unsatisfiable core [2024-11-14 04:43:37,294 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 04:43:37,659 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 38 [2024-11-14 04:43:37,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 60 [2024-11-14 04:43:37,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 94 [2024-11-14 04:43:37,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 50 [2024-11-14 04:43:37,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-14 04:43:37,783 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 27 [2024-11-14 04:43:37,807 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-14 04:43:37,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2024-11-14 04:43:37,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 23 [2024-11-14 04:43:37,835 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 14 [2024-11-14 04:43:37,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-14 04:43:41,642 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:43:41,642 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 68 [2024-11-14 04:43:41,724 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:43:41,725 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 04:43:43,898 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-14 04:43:43,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 55 [2024-11-14 04:43:43,976 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-14 04:43:43,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2024-11-14 04:43:43,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 4 [2024-11-14 04:43:44,403 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 0 proven. 758 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:43:44,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564171370] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 04:43:44,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [386932241] [2024-11-14 04:43:44,405 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2024-11-14 04:43:44,405 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 04:43:44,405 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 04:43:44,405 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 04:43:44,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 04:43:44,737 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 04:43:45,690 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '16204#(and (= |ULTIMATE.start_main_~CCCELVOL3~0#1| 7) (= |ULTIMATE.start_main_~CCCELVOL4~0#1| 5) (= |ULTIMATE.start_main_~CCCELVOL1~0#1| 1) (<= 1 ~CELLCOUNT~0) (= |ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 0 |ULTIMATE.start_main_~i~0#1|) (= |ULTIMATE.start_main_~CCCELVOL2~0#1| 3))' at error location [2024-11-14 04:43:45,691 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 04:43:45,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 04:43:45,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 33] total 96 [2024-11-14 04:43:45,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505928840] [2024-11-14 04:43:45,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 04:43:45,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-11-14 04:43:45,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 04:43:45,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-11-14 04:43:45,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=9715, Unknown=0, NotChecked=0, Total=10100 [2024-11-14 04:43:45,692 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 96 states, 96 states have (on average 2.4166666666666665) internal successors, (232), 96 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:45:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 04:45:18,097 INFO L93 Difference]: Finished difference Result 789 states and 816 transitions. [2024-11-14 04:45:18,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 300 states. [2024-11-14 04:45:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.4166666666666665) internal successors, (232), 96 states have internal predecessors, (232), 0 states have call successors, (0), 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 79 [2024-11-14 04:45:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 04:45:18,100 INFO L225 Difference]: With dead ends: 789 [2024-11-14 04:45:18,100 INFO L226 Difference]: Without dead ends: 787 [2024-11-14 04:45:18,107 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 169 SyntacticMatches, 1 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53735 ImplicationChecksByTransitivity, 65.6s TimeCoverageRelationStatistics Valid=8798, Invalid=150004, Unknown=0, NotChecked=0, Total=158802 [2024-11-14 04:45:18,108 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 1526 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 5321 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 6119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 5321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.3s IncrementalHoareTripleChecker+Time [2024-11-14 04:45:18,109 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1526 Valid, 668 Invalid, 6119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 5321 Invalid, 0 Unknown, 0 Unchecked, 31.3s Time] [2024-11-14 04:45:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2024-11-14 04:45:18,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 86. [2024-11-14 04:45:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 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 04:45:18,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2024-11-14 04:45:18,205 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 79 [2024-11-14 04:45:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 04:45:18,205 INFO L471 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2024-11-14 04:45:18,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.4166666666666665) internal successors, (232), 96 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 04:45:18,205 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2024-11-14 04:45:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-11-14 04:45:18,206 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 04:45:18,206 INFO L215 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 1, 1, 1, 1, 1, 1] [2024-11-14 04:45:18,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-14 04:45:18,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:18,406 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 04:45:18,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 04:45:18,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2067575978, now seen corresponding path program 20 times [2024-11-14 04:45:18,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 04:45:18,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131272946] [2024-11-14 04:45:18,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 04:45:18,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 04:45:18,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 04:45:19,914 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 806 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 04:45:19,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 04:45:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131272946] [2024-11-14 04:45:19,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131272946] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 04:45:19,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109269615] [2024-11-14 04:45:19,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 04:45:19,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 04:45:19,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 04:45:19,918 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 04:45:19,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9c8abb80-27ee-4421-9193-8683d9b12b5c/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process