./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.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_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/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_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/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_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/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 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-826ab2b [2024-11-14 03:32:01,192 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-14 03:32:01,271 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-14 03:32:01,277 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-14 03:32:01,277 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-14 03:32:01,301 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-14 03:32:01,302 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-14 03:32:01,302 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-14 03:32:01,303 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-14 03:32:01,303 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-14 03:32:01,303 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-14 03:32:01,303 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-14 03:32:01,304 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-14 03:32:01,304 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-14 03:32:01,304 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-14 03:32:01,304 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-14 03:32:01,304 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-14 03:32:01,304 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-14 03:32:01,305 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-14 03:32:01,305 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-14 03:32:01,305 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-14 03:32:01,305 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-14 03:32:01,306 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-14 03:32:01,306 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-14 03:32:01,306 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-14 03:32:01,306 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-14 03:32:01,306 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-14 03:32:01,306 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-14 03:32:01,307 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-14 03:32:01,307 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-14 03:32:01,307 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-14 03:32:01,307 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-14 03:32:01,307 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-14 03:32:01,307 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-14 03:32:01,308 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-14 03:32:01,308 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-14 03:32:01,308 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-14 03:32:01,308 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-14 03:32:01,308 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:32:01,308 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-14 03:32:01,309 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-14 03:32:01,309 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-14 03:32:01,309 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-14 03:32:01,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-14 03:32:01,309 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-14 03:32:01,309 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-14 03:32:01,310 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-14 03:32:01,310 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_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/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 -> 7a1978d5df6cab978f117700980416150440efa7bda2d4cde0711b48b83f0666 [2024-11-14 03:32:01,664 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-14 03:32:01,678 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-14 03:32:01,684 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-14 03:32:01,686 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-14 03:32:01,687 INFO L274 PluginConnector]: CDTParser initialized [2024-11-14 03:32:01,689 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/../../sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c Unable to find full path for "g++" [2024-11-14 03:32:03,855 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-14 03:32:04,105 INFO L384 CDTParser]: Found 1 translation units. [2024-11-14 03:32:04,107 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c [2024-11-14 03:32:04,120 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/data/c21956715/e8adbdc4dee24a7daa2a1fa30923c3d8/FLAG8e09b5935 [2024-11-14 03:32:04,140 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/data/c21956715/e8adbdc4dee24a7daa2a1fa30923c3d8 [2024-11-14 03:32:04,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-14 03:32:04,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-14 03:32:04,146 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-14 03:32:04,146 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-14 03:32:04,151 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-14 03:32:04,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,154 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44f20b98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04, skipping insertion in model container [2024-11-14 03:32:04,154 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,169 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-14 03:32:04,361 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_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2024-11-14 03:32:04,382 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:32:04,392 INFO L200 MainTranslator]: Completed pre-run [2024-11-14 03:32:04,404 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_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/sv-benchmarks/c/loops-crafted-1/mono-crafted_13.c[319,332] [2024-11-14 03:32:04,408 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-14 03:32:04,424 INFO L204 MainTranslator]: Completed translation [2024-11-14 03:32:04,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04 WrapperNode [2024-11-14 03:32:04,425 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-14 03:32:04,426 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-14 03:32:04,426 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-14 03:32:04,427 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-14 03:32:04,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,441 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,456 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2024-11-14 03:32:04,456 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-14 03:32:04,457 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-14 03:32:04,457 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-14 03:32:04,457 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-14 03:32:04,465 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,465 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,466 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,466 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,472 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,473 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,474 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,475 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-14 03:32:04,476 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-14 03:32:04,476 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-14 03:32:04,476 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-14 03:32:04,477 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (1/1) ... [2024-11-14 03:32:04,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-14 03:32:04,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:04,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-14 03:32:04,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-14 03:32:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-14 03:32:04,557 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-14 03:32:04,558 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-14 03:32:04,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-14 03:32:04,646 INFO L238 CfgBuilder]: Building ICFG [2024-11-14 03:32:04,648 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-14 03:32:04,819 INFO L? ?]: Removed 9 outVars from TransFormulas that were not future-live. [2024-11-14 03:32:04,819 INFO L287 CfgBuilder]: Performing block encoding [2024-11-14 03:32:04,901 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-14 03:32:04,902 INFO L316 CfgBuilder]: Removed 2 assume(true) statements. [2024-11-14 03:32:04,902 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:32:04 BoogieIcfgContainer [2024-11-14 03:32:04,902 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-14 03:32:04,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-14 03:32:04,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-14 03:32:04,915 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-14 03:32:04,916 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.11 03:32:04" (1/3) ... [2024-11-14 03:32:04,917 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f1b7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:32:04, skipping insertion in model container [2024-11-14 03:32:04,917 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.11 03:32:04" (2/3) ... [2024-11-14 03:32:04,918 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28f1b7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.11 03:32:04, skipping insertion in model container [2024-11-14 03:32:04,918 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.11 03:32:04" (3/3) ... [2024-11-14 03:32:04,920 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_13.c [2024-11-14 03:32:04,941 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-14 03:32:04,944 INFO L154 ceAbstractionStarter]: Applying trace abstraction to ICFG mono-crafted_13.c that has 1 procedures, 8 locations, 1 initial locations, 2 loop locations, and 1 error locations. [2024-11-14 03:32:05,027 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-14 03:32:05,050 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;@27f1168, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-14 03:32:05,050 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-14 03:32:05,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:05,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-14 03:32:05,065 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:05,066 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-14 03:32:05,066 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:05,077 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:05,077 INFO L85 PathProgramCache]: Analyzing trace with hash 71637842, now seen corresponding path program 1 times [2024-11-14 03:32:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568697953] [2024-11-14 03:32:05,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:05,311 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 03:32:05,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:05,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568697953] [2024-11-14 03:32:05,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568697953] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-14 03:32:05,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-14 03:32:05,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-14 03:32:05,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924072039] [2024-11-14 03:32:05,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:32:05,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-14 03:32:05,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:05,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-14 03:32:05,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:32:05,353 INFO L87 Difference]: Start difference. First operand has 8 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 7 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:05,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:05,391 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2024-11-14 03:32:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:32:05,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-14 03:32:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:05,402 INFO L225 Difference]: With dead ends: 15 [2024-11-14 03:32:05,402 INFO L226 Difference]: Without dead ends: 7 [2024-11-14 03:32:05,405 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-14 03:32:05,409 INFO L432 NwaCegarLoop]: 4 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:05,410 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:32:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2024-11-14 03:32:05,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2024-11-14 03:32:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:05,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 8 transitions. [2024-11-14 03:32:05,452 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 8 transitions. Word has length 5 [2024-11-14 03:32:05,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:05,452 INFO L471 AbstractCegarLoop]: Abstraction has 7 states and 8 transitions. [2024-11-14 03:32:05,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:05,454 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 8 transitions. [2024-11-14 03:32:05,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-14 03:32:05,454 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:05,454 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-14 03:32:05,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-14 03:32:05,456 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:05,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:05,457 INFO L85 PathProgramCache]: Analyzing trace with hash -2072449045, now seen corresponding path program 1 times [2024-11-14 03:32:05,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:05,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284640611] [2024-11-14 03:32:05,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:05,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:05,666 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 03:32:05,666 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:05,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284640611] [2024-11-14 03:32:05,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284640611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:05,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133852385] [2024-11-14 03:32:05,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:05,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:05,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:05,675 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:05,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-14 03:32:05,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:05,738 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-14 03:32:05,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:05,878 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 03:32:05,879 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:06,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:06,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133852385] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:06,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-14 03:32:06,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2024-11-14 03:32:06,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288774006] [2024-11-14 03:32:06,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-14 03:32:06,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-14 03:32:06,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:06,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-14 03:32:06,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:32:06,072 INFO L87 Difference]: Start difference. First operand 7 states and 8 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:06,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:06,096 INFO L93 Difference]: Finished difference Result 11 states and 12 transitions. [2024-11-14 03:32:06,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-14 03:32:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2024-11-14 03:32:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:06,097 INFO L225 Difference]: With dead ends: 11 [2024-11-14 03:32:06,097 INFO L226 Difference]: Without dead ends: 8 [2024-11-14 03:32:06,097 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-11-14 03:32:06,098 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:06,099 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 6 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:32:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2024-11-14 03:32:06,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2024-11-14 03:32:06,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:06,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2024-11-14 03:32:06,103 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 6 [2024-11-14 03:32:06,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:06,104 INFO L471 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2024-11-14 03:32:06,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:06,104 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2024-11-14 03:32:06,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-14 03:32:06,105 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:06,105 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-14 03:32:06,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-14 03:32:06,306 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:06,306 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:06,306 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:06,307 INFO L85 PathProgramCache]: Analyzing trace with hash 177861541, now seen corresponding path program 1 times [2024-11-14 03:32:06,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:06,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805065374] [2024-11-14 03:32:06,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:06,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:06,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:06,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805065374] [2024-11-14 03:32:06,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805065374] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:06,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291076001] [2024-11-14 03:32:06,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:06,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:06,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:06,404 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:06,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-14 03:32:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:06,452 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-11-14 03:32:06,453 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:06,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:06,468 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:06,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291076001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:06,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15781401] [2024-11-14 03:32:06,555 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:06,556 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:06,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:06,565 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:06,565 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:06,854 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:06,937 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '153#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_39| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_39| 2) 0))))' at error location [2024-11-14 03:32:06,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:06,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:06,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2024-11-14 03:32:06,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520919523] [2024-11-14 03:32:06,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:06,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-14 03:32:06,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:06,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-14 03:32:06,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:32:06,940 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:06,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:06,972 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2024-11-14 03:32:06,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-14 03:32:06,972 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2024-11-14 03:32:06,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:06,974 INFO L225 Difference]: With dead ends: 16 [2024-11-14 03:32:06,974 INFO L226 Difference]: Without dead ends: 11 [2024-11-14 03:32:06,974 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-11-14 03:32:06,975 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:06,977 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:32:06,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-11-14 03:32:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-11-14 03:32:06,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2024-11-14 03:32:06,983 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 7 [2024-11-14 03:32:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:06,984 INFO L471 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2024-11-14 03:32:06,984 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2024-11-14 03:32:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-11-14 03:32:06,985 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:06,985 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2024-11-14 03:32:07,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-14 03:32:07,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:07,185 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:07,186 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:07,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1062346462, now seen corresponding path program 2 times [2024-11-14 03:32:07,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:07,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826942394] [2024-11-14 03:32:07,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:07,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:07,606 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:07,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826942394] [2024-11-14 03:32:07,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826942394] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:07,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313103020] [2024-11-14 03:32:07,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:32:07,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:07,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:07,612 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:07,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-14 03:32:07,688 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-14 03:32:07,688 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:07,689 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-14 03:32:07,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:07,722 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:07,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313103020] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:07,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [569018420] [2024-11-14 03:32:07,997 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:07,997 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:07,997 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:07,997 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:07,997 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:08,173 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:08,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '266#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_55| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_55| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_55|))) (exists ((|v_ULTIMATE.start_main_~x~0#1_55| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_55| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_55| 1) 0)))))' at error location [2024-11-14 03:32:08,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:08,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:08,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-14 03:32:08,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436470655] [2024-11-14 03:32:08,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:08,308 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-14 03:32:08,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:08,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-14 03:32:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:32:08,311 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:08,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:08,367 INFO L93 Difference]: Finished difference Result 22 states and 29 transitions. [2024-11-14 03:32:08,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-14 03:32:08,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-11-14 03:32:08,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:08,369 INFO L225 Difference]: With dead ends: 22 [2024-11-14 03:32:08,369 INFO L226 Difference]: Without dead ends: 17 [2024-11-14 03:32:08,369 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-11-14 03:32:08,370 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:08,370 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 9 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-14 03:32:08,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-11-14 03:32:08,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-11-14 03:32:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-11-14 03:32:08,378 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 10 [2024-11-14 03:32:08,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:08,379 INFO L471 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-11-14 03:32:08,379 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:08,379 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-11-14 03:32:08,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-11-14 03:32:08,380 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:08,380 INFO L215 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2024-11-14 03:32:08,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-14 03:32:08,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:08,581 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:08,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:08,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2127619714, now seen corresponding path program 3 times [2024-11-14 03:32:08,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:08,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740558000] [2024-11-14 03:32:08,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:08,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:09,356 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:09,357 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740558000] [2024-11-14 03:32:09,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740558000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:09,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937596879] [2024-11-14 03:32:09,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:32:09,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:09,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:09,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:09,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-14 03:32:09,433 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:32:09,433 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:09,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-14 03:32:09,443 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-14 03:32:09,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937596879] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1315115004] [2024-11-14 03:32:10,796 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:10,796 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:10,797 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:10,797 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:10,797 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:10,916 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:11,094 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '463#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_83| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_83| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_83|))) (exists ((|v_ULTIMATE.start_main_~x~0#1_83| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_83| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_83| 1) 0)))))' at error location [2024-11-14 03:32:11,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:11,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:11,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 14] total 36 [2024-11-14 03:32:11,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313165243] [2024-11-14 03:32:11,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:11,096 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-11-14 03:32:11,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:11,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-11-14 03:32:11,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2024-11-14 03:32:11,100 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:11,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:11,324 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2024-11-14 03:32:11,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-14 03:32:11,325 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2024-11-14 03:32:11,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:11,326 INFO L225 Difference]: With dead ends: 24 [2024-11-14 03:32:11,326 INFO L226 Difference]: Without dead ends: 19 [2024-11-14 03:32:11,327 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 688 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2024-11-14 03:32:11,328 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:11,328 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:11,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-11-14 03:32:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-11-14 03:32:11,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 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 03:32:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2024-11-14 03:32:11,333 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2024-11-14 03:32:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:11,333 INFO L471 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2024-11-14 03:32:11,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 36 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:11,334 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2024-11-14 03:32:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-11-14 03:32:11,334 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:11,334 INFO L215 NwaCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1] [2024-11-14 03:32:11,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-14 03:32:11,538 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:11,539 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:11,539 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:11,539 INFO L85 PathProgramCache]: Analyzing trace with hash 2114827147, now seen corresponding path program 4 times [2024-11-14 03:32:11,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:11,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996458945] [2024-11-14 03:32:11,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:11,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:12,145 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:32:12,145 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996458945] [2024-11-14 03:32:12,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996458945] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:12,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174914455] [2024-11-14 03:32:12,146 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:32:12,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:12,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:12,148 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:12,151 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-14 03:32:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:12,221 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-14 03:32:12,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:12,547 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-14 03:32:12,547 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:13,493 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:13,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174914455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:13,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1010683976] [2024-11-14 03:32:13,496 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:13,496 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:13,496 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:13,497 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:13,497 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:13,603 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:13,770 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '688#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_114| Int)) (and (<= (+ |v_ULTIMATE.start_main_~x~0#1_114| 1) 0) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_114| 2) 0)))) (exists ((|v_ULTIMATE.start_main_~x~0#1_114| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_114|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_114| 2) 0))))))' at error location [2024-11-14 03:32:13,770 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:13,770 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:13,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16] total 40 [2024-11-14 03:32:13,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677890927] [2024-11-14 03:32:13,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:13,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-11-14 03:32:13,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:13,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-11-14 03:32:13,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=1235, Unknown=0, NotChecked=0, Total=1892 [2024-11-14 03:32:13,774 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 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 03:32:13,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:13,985 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2024-11-14 03:32:13,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-14 03:32:13,987 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 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 18 [2024-11-14 03:32:13,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:13,987 INFO L225 Difference]: With dead ends: 27 [2024-11-14 03:32:13,987 INFO L226 Difference]: Without dead ends: 21 [2024-11-14 03:32:13,989 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=738, Invalid=1332, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:32:13,989 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:13,990 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:13,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-11-14 03:32:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-11-14 03:32:14,001 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 03:32:14,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-11-14 03:32:14,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2024-11-14 03:32:14,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:14,002 INFO L471 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-11-14 03:32:14,004 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 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 03:32:14,004 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-11-14 03:32:14,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-11-14 03:32:14,004 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:14,005 INFO L215 NwaCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1] [2024-11-14 03:32:14,030 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-14 03:32:14,205 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:14,205 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:14,206 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1454438622, now seen corresponding path program 5 times [2024-11-14 03:32:14,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:14,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949228767] [2024-11-14 03:32:14,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:14,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:14,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:14,835 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:32:14,835 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949228767] [2024-11-14 03:32:14,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949228767] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:14,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554204079] [2024-11-14 03:32:14,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:32:14,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:14,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:14,838 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:14,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-14 03:32:14,919 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-11-14 03:32:14,920 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:14,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-14 03:32:14,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:15,269 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-14 03:32:15,269 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:16,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554204079] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:16,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [805427139] [2024-11-14 03:32:16,237 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:16,238 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:16,238 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:16,238 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:16,238 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:16,312 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:16,452 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '939#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_148| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_148| 2) 0))))' at error location [2024-11-14 03:32:16,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:16,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:16,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 18] total 44 [2024-11-14 03:32:16,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212139689] [2024-11-14 03:32:16,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:16,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-11-14 03:32:16,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:16,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-11-14 03:32:16,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=1471, Unknown=0, NotChecked=0, Total=2256 [2024-11-14 03:32:16,457 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:16,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:16,679 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-11-14 03:32:16,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-14 03:32:16,682 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2024-11-14 03:32:16,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:16,682 INFO L225 Difference]: With dead ends: 30 [2024-11-14 03:32:16,682 INFO L226 Difference]: Without dead ends: 23 [2024-11-14 03:32:16,684 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=874, Invalid=1576, Unknown=0, NotChecked=0, Total=2450 [2024-11-14 03:32:16,684 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:16,685 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:16,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-11-14 03:32:16,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-11-14 03:32:16,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:16,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-11-14 03:32:16,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2024-11-14 03:32:16,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:16,692 INFO L471 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-11-14 03:32:16,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 44 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:16,693 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-11-14 03:32:16,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-14 03:32:16,693 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:16,693 INFO L215 NwaCegarLoop]: trace histogram [13, 4, 1, 1, 1, 1, 1] [2024-11-14 03:32:16,716 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-14 03:32:16,897 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:16,898 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:16,898 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:16,898 INFO L85 PathProgramCache]: Analyzing trace with hash 452234155, now seen corresponding path program 6 times [2024-11-14 03:32:16,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:16,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704573924] [2024-11-14 03:32:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:16,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:32:17,728 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:17,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704573924] [2024-11-14 03:32:17,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704573924] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:17,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715943588] [2024-11-14 03:32:17,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:32:17,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:17,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:17,731 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:17,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-14 03:32:17,802 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:32:17,802 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:17,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-14 03:32:17,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-14 03:32:18,174 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:19,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715943588] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:19,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [300003438] [2024-11-14 03:32:19,191 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:19,191 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:19,192 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:19,192 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:19,192 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:19,258 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:19,388 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1216#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_185| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_185| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_185|))) (exists ((|v_ULTIMATE.start_main_~x~0#1_185| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_185| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_185| 1) 0)))))' at error location [2024-11-14 03:32:19,388 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:19,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:19,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 20] total 48 [2024-11-14 03:32:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093121901] [2024-11-14 03:32:19,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:19,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-11-14 03:32:19,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:19,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-11-14 03:32:19,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2024-11-14 03:32:19,391 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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 03:32:19,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:19,700 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2024-11-14 03:32:19,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-14 03:32:19,700 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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 22 [2024-11-14 03:32:19,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:19,701 INFO L225 Difference]: With dead ends: 34 [2024-11-14 03:32:19,701 INFO L226 Difference]: Without dead ends: 26 [2024-11-14 03:32:19,702 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1031, Invalid=1939, Unknown=0, NotChecked=0, Total=2970 [2024-11-14 03:32:19,703 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:19,703 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:19,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-11-14 03:32:19,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-11-14 03:32:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-11-14 03:32:19,720 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2024-11-14 03:32:19,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:19,720 INFO L471 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-11-14 03:32:19,721 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 48 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 03:32:19,721 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-11-14 03:32:19,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-14 03:32:19,721 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:19,721 INFO L215 NwaCegarLoop]: trace histogram [15, 5, 1, 1, 1, 1, 1] [2024-11-14 03:32:19,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-14 03:32:19,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:19,923 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:19,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:19,924 INFO L85 PathProgramCache]: Analyzing trace with hash -352724219, now seen corresponding path program 7 times [2024-11-14 03:32:19,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:19,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796565183] [2024-11-14 03:32:19,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:19,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-14 03:32:20,686 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796565183] [2024-11-14 03:32:20,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796565183] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:20,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390522573] [2024-11-14 03:32:20,687 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:32:20,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:20,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:20,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:20,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-14 03:32:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:20,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-14 03:32:20,775 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:21,319 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:21,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 120 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:27,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390522573] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:27,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1803173117] [2024-11-14 03:32:27,549 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:27,550 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:27,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:27,550 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:27,550 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:27,616 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:27,792 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1538#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_227| Int)) (and (<= (+ |v_ULTIMATE.start_main_~x~0#1_227| 1) 0) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_227| 2) 0)))) (exists ((|v_ULTIMATE.start_main_~x~0#1_227| Int)) (and (<= 0 |v_ULTIMATE.start_main_~x~0#1_227|) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_227| 2) 0))))))' at error location [2024-11-14 03:32:27,792 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:27,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 22, 22] total 59 [2024-11-14 03:32:27,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891224306] [2024-11-14 03:32:27,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:27,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-11-14 03:32:27,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:27,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-11-14 03:32:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1171, Invalid=2735, Unknown=0, NotChecked=0, Total=3906 [2024-11-14 03:32:27,796 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 60 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:27,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:27,936 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2024-11-14 03:32:27,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-14 03:32:27,937 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2024-11-14 03:32:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:27,937 INFO L225 Difference]: With dead ends: 43 [2024-11-14 03:32:27,937 INFO L226 Difference]: Without dead ends: 34 [2024-11-14 03:32:27,939 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1609 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1277, Invalid=2883, Unknown=0, NotChecked=0, Total=4160 [2024-11-14 03:32:27,939 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:27,939 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:27,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-14 03:32:27,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-14 03:32:27,955 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 03:32:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2024-11-14 03:32:27,956 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 25 [2024-11-14 03:32:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:27,956 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2024-11-14 03:32:27,957 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 59 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2024-11-14 03:32:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-14 03:32:27,957 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:27,958 INFO L215 NwaCegarLoop]: trace histogram [16, 12, 1, 1, 1, 1, 1] [2024-11-14 03:32:27,979 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-14 03:32:28,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:28,162 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:28,162 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash 535432530, now seen corresponding path program 8 times [2024-11-14 03:32:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:28,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931575709] [2024-11-14 03:32:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:28,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:28,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-11-14 03:32:28,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:28,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931575709] [2024-11-14 03:32:28,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931575709] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:28,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657214031] [2024-11-14 03:32:28,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:32:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:28,985 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:28,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-14 03:32:29,088 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-11-14 03:32:29,089 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:29,096 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-14 03:32:29,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 214 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:30,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 136 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:37,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657214031] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:37,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1148794719] [2024-11-14 03:32:37,798 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:37,798 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:37,798 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:37,798 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:37,799 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:37,862 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:38,057 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1957#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_278| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_278| 2) 0))))' at error location [2024-11-14 03:32:38,057 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:38,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:38,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 30, 30] total 76 [2024-11-14 03:32:38,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697260998] [2024-11-14 03:32:38,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:38,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-11-14 03:32:38,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:38,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-11-14 03:32:38,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1943, Invalid=4377, Unknown=0, NotChecked=0, Total=6320 [2024-11-14 03:32:38,061 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 77 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:38,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:38,248 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-11-14 03:32:38,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-11-14 03:32:38,250 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 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 03:32:38,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:38,252 INFO L225 Difference]: With dead ends: 65 [2024-11-14 03:32:38,252 INFO L226 Difference]: Without dead ends: 49 [2024-11-14 03:32:38,254 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=2082, Invalid=4560, Unknown=0, NotChecked=0, Total=6642 [2024-11-14 03:32:38,256 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:38,257 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:38,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-11-14 03:32:38,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-11-14 03:32:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-11-14 03:32:38,287 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 33 [2024-11-14 03:32:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:38,287 INFO L471 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-11-14 03:32:38,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0909090909090908) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:38,288 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-11-14 03:32:38,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-11-14 03:32:38,288 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:38,288 INFO L215 NwaCegarLoop]: trace histogram [26, 17, 1, 1, 1, 1, 1] [2024-11-14 03:32:38,303 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-14 03:32:38,490 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:38,490 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:38,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:38,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2068888277, now seen corresponding path program 9 times [2024-11-14 03:32:38,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:38,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127413811] [2024-11-14 03:32:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:38,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:39,405 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 03:32:39,406 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127413811] [2024-11-14 03:32:39,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127413811] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:39,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863500684] [2024-11-14 03:32:39,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:32:39,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:39,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:39,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:39,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-14 03:32:39,510 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:32:39,510 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:39,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-14 03:32:39,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:39,941 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-11-14 03:32:39,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 0 proven. 504 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:41,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863500684] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:41,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1962992229] [2024-11-14 03:32:41,912 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:41,912 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:41,913 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:41,913 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:41,913 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:41,962 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:42,096 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2546#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_345| Int)) (not (= (mod |v_ULTIMATE.start_main_~x~0#1_345| 2) 0))))' at error location [2024-11-14 03:32:42,096 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:42,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:42,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 46] total 82 [2024-11-14 03:32:42,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895792820] [2024-11-14 03:32:42,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:42,097 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-11-14 03:32:42,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:42,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-11-14 03:32:42,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2436, Invalid=4874, Unknown=0, NotChecked=0, Total=7310 [2024-11-14 03:32:42,101 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 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 03:32:42,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:42,334 INFO L93 Difference]: Finished difference Result 81 states and 84 transitions. [2024-11-14 03:32:42,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-14 03:32:42,335 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2024-11-14 03:32:42,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:42,335 INFO L225 Difference]: With dead ends: 81 [2024-11-14 03:32:42,336 INFO L226 Difference]: Without dead ends: 51 [2024-11-14 03:32:42,338 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2589, Invalid=5067, Unknown=0, NotChecked=0, Total=7656 [2024-11-14 03:32:42,338 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:42,339 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:42,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-11-14 03:32:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-11-14 03:32:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:32:42,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-11-14 03:32:42,361 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2024-11-14 03:32:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:42,362 INFO L471 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-11-14 03:32:42,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 82 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 03:32:42,362 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-11-14 03:32:42,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-11-14 03:32:42,363 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:42,363 INFO L215 NwaCegarLoop]: trace histogram [27, 18, 1, 1, 1, 1, 1] [2024-11-14 03:32:42,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-14 03:32:42,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:42,563 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:42,564 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:42,564 INFO L85 PathProgramCache]: Analyzing trace with hash -603432578, now seen corresponding path program 10 times [2024-11-14 03:32:42,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:42,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33378766] [2024-11-14 03:32:42,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:42,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-14 03:32:43,588 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:43,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33378766] [2024-11-14 03:32:43,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33378766] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:43,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813089539] [2024-11-14 03:32:43,588 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:32:43,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:43,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:43,591 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:43,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-14 03:32:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:43,721 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-14 03:32:43,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-11-14 03:32:44,233 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:46,550 INFO L134 CoverageAnalysis]: Checked inductivity of 549 backedges. 0 proven. 549 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:46,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813089539] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:46,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [148753724] [2024-11-14 03:32:46,551 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:46,551 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:46,552 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:46,552 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:46,552 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:46,611 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:46,771 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3187#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_415| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_415| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_415| 1) 0))) (exists ((|v_ULTIMATE.start_main_~x~0#1_415| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_415| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_415|)))))' at error location [2024-11-14 03:32:46,771 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:46,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:46,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 48] total 86 [2024-11-14 03:32:46,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968921832] [2024-11-14 03:32:46,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:46,772 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-14 03:32:46,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:46,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-14 03:32:46,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2678, Invalid=5332, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 03:32:46,777 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 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 03:32:47,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:47,041 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2024-11-14 03:32:47,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-11-14 03:32:47,041 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 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 50 [2024-11-14 03:32:47,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:47,042 INFO L225 Difference]: With dead ends: 84 [2024-11-14 03:32:47,042 INFO L226 Difference]: Without dead ends: 53 [2024-11-14 03:32:47,043 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3755 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2839, Invalid=5533, Unknown=0, NotChecked=0, Total=8372 [2024-11-14 03:32:47,044 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:47,044 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:47,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-11-14 03:32:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-11-14 03:32:47,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 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 03:32:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-11-14 03:32:47,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2024-11-14 03:32:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:47,066 INFO L471 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-11-14 03:32:47,067 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 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 03:32:47,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-11-14 03:32:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-11-14 03:32:47,067 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:47,067 INFO L215 NwaCegarLoop]: trace histogram [28, 19, 1, 1, 1, 1, 1] [2024-11-14 03:32:47,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-14 03:32:47,268 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-14 03:32:47,268 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:47,268 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:47,268 INFO L85 PathProgramCache]: Analyzing trace with hash 563703115, now seen corresponding path program 11 times [2024-11-14 03:32:47,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:47,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747170341] [2024-11-14 03:32:47,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:47,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:47,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:48,411 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-14 03:32:48,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:48,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747170341] [2024-11-14 03:32:48,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747170341] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:48,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384062327] [2024-11-14 03:32:48,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:32:48,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:48,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:48,415 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:48,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-14 03:32:48,540 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-11-14 03:32:48,540 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:48,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-14 03:32:48,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-14 03:32:48,603 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:32:49,631 INFO L134 CoverageAnalysis]: Checked inductivity of 596 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-14 03:32:49,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384062327] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:32:49,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [923216243] [2024-11-14 03:32:49,633 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:32:49,633 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:32:49,633 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:32:49,633 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:32:49,634 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:32:49,697 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:32:49,799 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3806#(and (or (exists ((|v_ULTIMATE.start_main_~x~0#1_488| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_488| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_488| 1) 0))) (exists ((|v_ULTIMATE.start_main_~x~0#1_488| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_488| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_488|)))) (<= 1 |#StackHeapBarrier|))' at error location [2024-11-14 03:32:49,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:32:49,799 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:32:49,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 42 [2024-11-14 03:32:49,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367098162] [2024-11-14 03:32:49,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:32:49,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-11-14 03:32:49,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:32:49,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-11-14 03:32:49,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:32:49,801 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 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 03:32:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:32:49,907 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2024-11-14 03:32:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-11-14 03:32:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2024-11-14 03:32:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:32:49,908 INFO L225 Difference]: With dead ends: 106 [2024-11-14 03:32:49,908 INFO L226 Difference]: Without dead ends: 74 [2024-11-14 03:32:49,908 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=911, Invalid=1159, Unknown=0, NotChecked=0, Total=2070 [2024-11-14 03:32:49,909 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:32:49,909 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:32:49,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-11-14 03:32:49,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-11-14 03:32:49,935 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 03:32:49,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2024-11-14 03:32:49,936 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 52 [2024-11-14 03:32:49,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:32:49,936 INFO L471 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2024-11-14 03:32:49,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 42 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 03:32:49,937 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2024-11-14 03:32:49,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-11-14 03:32:49,938 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:32:49,938 INFO L215 NwaCegarLoop]: trace histogram [40, 28, 1, 1, 1, 1, 1] [2024-11-14 03:32:49,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-14 03:32:50,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-14 03:32:50,141 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:32:50,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:32:50,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1474335022, now seen corresponding path program 12 times [2024-11-14 03:32:50,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:32:50,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817516463] [2024-11-14 03:32:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:32:50,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:32:50,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:32:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2024-11-14 03:32:53,517 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:32:53,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817516463] [2024-11-14 03:32:53,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817516463] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:32:53,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998964362] [2024-11-14 03:32:53,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:32:53,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:32:53,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:32:53,520 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:32:53,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-14 03:32:53,651 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:32:53,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:32:53,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-11-14 03:32:53,664 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:32:56,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 0 proven. 1226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:32:56,611 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:35:13,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1226 backedges. 820 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:35:13,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998964362] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:35:13,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1299031624] [2024-11-14 03:35:13,409 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:35:13,409 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:35:13,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:35:13,410 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:35:13,410 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:35:13,468 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:35:13,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4771#(and (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_~x~0#1_603| Int)) (not (= 0 (mod |v_ULTIMATE.start_main_~x~0#1_603| 2)))))' at error location [2024-11-14 03:35:13,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:35:13,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:35:13,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 70, 70] total 180 [2024-11-14 03:35:13,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699225712] [2024-11-14 03:35:13,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:35:13,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 181 states [2024-11-14 03:35:13,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:13,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 181 interpolants. [2024-11-14 03:35:13,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10575, Invalid=23097, Unknown=0, NotChecked=0, Total=33672 [2024-11-14 03:35:13,945 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 181 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 180 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:35:14,673 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2024-11-14 03:35:14,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2024-11-14 03:35:14,675 INFO L78 Accepts]: Start accepts. Automaton has has 181 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 180 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2024-11-14 03:35:14,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:14,676 INFO L225 Difference]: With dead ends: 137 [2024-11-14 03:35:14,676 INFO L226 Difference]: Without dead ends: 105 [2024-11-14 03:35:14,680 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13240 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=10898, Invalid=23512, Unknown=0, NotChecked=0, Total=34410 [2024-11-14 03:35:14,681 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:14,682 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-14 03:35:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-11-14 03:35:14,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-11-14 03:35:14,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-11-14 03:35:14,746 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 73 [2024-11-14 03:35:14,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:14,746 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-11-14 03:35:14,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 181 states, 181 states have (on average 1.0386740331491713) internal successors, (188), 180 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:14,746 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-11-14 03:35:14,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-11-14 03:35:14,747 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:14,748 INFO L215 NwaCegarLoop]: trace histogram [58, 41, 1, 1, 1, 1, 1] [2024-11-14 03:35:14,766 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-14 03:35:14,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-14 03:35:14,948 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:14,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1663267755, now seen corresponding path program 13 times [2024-11-14 03:35:14,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:14,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264202544] [2024-11-14 03:35:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-14 03:35:19,109 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264202544] [2024-11-14 03:35:19,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264202544] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:35:19,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579955083] [2024-11-14 03:35:19,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-14 03:35:19,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:19,109 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:19,111 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:35:19,112 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-14 03:35:19,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:19,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-14 03:35:19,349 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:35:19,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-14 03:35:19,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:35:23,357 INFO L134 CoverageAnalysis]: Checked inductivity of 2572 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-14 03:35:23,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579955083] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:35:23,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [916674854] [2024-11-14 03:35:23,359 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:35:23,359 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:35:23,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:35:23,360 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:35:23,360 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:35:23,437 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:35:23,622 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5956#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_750| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_750| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_750| 1) 0))) (exists ((|v_ULTIMATE.start_main_~x~0#1_750| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_750| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_750|)))))' at error location [2024-11-14 03:35:23,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:35:23,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:35:23,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 86 [2024-11-14 03:35:23,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112674415] [2024-11-14 03:35:23,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:35:23,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2024-11-14 03:35:23,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:35:23,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2024-11-14 03:35:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3749, Invalid=4261, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 03:35:23,629 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 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 03:35:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:35:23,918 INFO L93 Difference]: Finished difference Result 210 states and 254 transitions. [2024-11-14 03:35:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2024-11-14 03:35:23,919 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 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 104 [2024-11-14 03:35:23,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:35:23,921 INFO L225 Difference]: With dead ends: 210 [2024-11-14 03:35:23,921 INFO L226 Difference]: Without dead ends: 148 [2024-11-14 03:35:23,923 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3749, Invalid=4261, Unknown=0, NotChecked=0, Total=8010 [2024-11-14 03:35:23,925 INFO L432 NwaCegarLoop]: 3 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-14 03:35:23,926 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 11 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-14 03:35:23,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2024-11-14 03:35:24,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2024-11-14 03:35:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:35:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2024-11-14 03:35:24,014 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 104 [2024-11-14 03:35:24,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:35:24,015 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2024-11-14 03:35:24,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 86 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 03:35:24,015 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2024-11-14 03:35:24,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-11-14 03:35:24,018 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:35:24,018 INFO L215 NwaCegarLoop]: trace histogram [84, 58, 1, 1, 1, 1, 1] [2024-11-14 03:35:24,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-14 03:35:24,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-14 03:35:24,219 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:35:24,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:35:24,219 INFO L85 PathProgramCache]: Analyzing trace with hash -926954990, now seen corresponding path program 14 times [2024-11-14 03:35:24,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:35:24,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827845107] [2024-11-14 03:35:24,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:35:24,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:35:24,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:35:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-14 03:35:37,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:35:37,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827845107] [2024-11-14 03:35:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827845107] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:35:37,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647260453] [2024-11-14 03:35:37,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-14 03:35:37,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:35:37,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:35:37,109 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:35:37,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-14 03:35:37,611 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 43 check-sat command(s) [2024-11-14 03:35:37,611 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:35:37,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 147 conjuncts are in the unsatisfiable core [2024-11-14 03:35:37,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:35:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-14 03:35:42,820 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:36:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 0 proven. 5281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:08,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647260453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-14 03:36:08,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [465345392] [2024-11-14 03:36:08,608 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2024-11-14 03:36:08,608 INFO L166 IcfgInterpreter]: Building call graph [2024-11-14 03:36:08,608 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-14 03:36:08,608 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-14 03:36:08,608 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-14 03:36:08,662 INFO L180 IcfgInterpreter]: Interpretation finished [2024-11-14 03:36:09,257 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7856#(and (<= 1 |#StackHeapBarrier|) (or (exists ((|v_ULTIMATE.start_main_~x~0#1_983| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_983| 2) 0)) (<= (+ |v_ULTIMATE.start_main_~x~0#1_983| 1) 0))) (exists ((|v_ULTIMATE.start_main_~x~0#1_983| Int)) (and (not (= (mod |v_ULTIMATE.start_main_~x~0#1_983| 2) 0)) (<= 0 |v_ULTIMATE.start_main_~x~0#1_983|)))))' at error location [2024-11-14 03:36:09,257 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2024-11-14 03:36:09,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-14 03:36:09,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86, 145] total 315 [2024-11-14 03:36:09,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858468346] [2024-11-14 03:36:09,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-14 03:36:09,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 316 states [2024-11-14 03:36:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-14 03:36:09,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 316 interpolants. [2024-11-14 03:36:09,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36752, Invalid=64690, Unknown=0, NotChecked=0, Total=101442 [2024-11-14 03:36:09,275 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 316 states, 316 states have (on average 1.0158227848101267) internal successors, (321), 315 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-14 03:36:14,088 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2024-11-14 03:36:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2024-11-14 03:36:14,089 INFO L78 Accepts]: Start accepts. Automaton has has 316 states, 316 states have (on average 1.0158227848101267) internal successors, (321), 315 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2024-11-14 03:36:14,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-14 03:36:14,091 INFO L225 Difference]: With dead ends: 212 [2024-11-14 03:36:14,091 INFO L226 Difference]: Without dead ends: 150 [2024-11-14 03:36:14,095 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49346 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=37355, Invalid=65365, Unknown=0, NotChecked=0, Total=102720 [2024-11-14 03:36:14,096 INFO L432 NwaCegarLoop]: 2 mSDtfsCounter, 0 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-14 03:36:14,096 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 178 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-14 03:36:14,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-11-14 03:36:14,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2024-11-14 03:36:14,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2024-11-14 03:36:14,152 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2024-11-14 03:36:14,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-14 03:36:14,153 INFO L471 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2024-11-14 03:36:14,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 316 states, 316 states have (on average 1.0158227848101267) internal successors, (321), 315 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-14 03:36:14,153 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2024-11-14 03:36:14,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2024-11-14 03:36:14,155 INFO L207 NwaCegarLoop]: Found error trace [2024-11-14 03:36:14,155 INFO L215 NwaCegarLoop]: trace histogram [85, 59, 1, 1, 1, 1, 1] [2024-11-14 03:36:14,170 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-14 03:36:14,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:14,356 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-14 03:36:14,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-14 03:36:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1910885211, now seen corresponding path program 15 times [2024-11-14 03:36:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-14 03:36:14,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151522359] [2024-11-14 03:36:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-14 03:36:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-14 03:36:14,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-14 03:36:26,933 INFO L134 CoverageAnalysis]: Checked inductivity of 5425 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-14 03:36:26,934 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-14 03:36:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151522359] [2024-11-14 03:36:26,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151522359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-14 03:36:26,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679551616] [2024-11-14 03:36:26,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-14 03:36:26,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-14 03:36:26,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 [2024-11-14 03:36:26,936 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-14 03:36:26,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_21c0e321-39c3-470b-8cb2-2c5aff49bfd9/bin/utaipan-verify-sOmjnqqW8E/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-14 03:36:27,205 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-14 03:36:27,205 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-14 03:36:27,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 148 conjuncts are in the unsatisfiable core [2024-11-14 03:36:27,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-14 03:36:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5425 backedges. 0 proven. 5425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-14 03:36:41,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-14 03:44:01,086 WARN L286 SmtUtils]: Spent 5.59s on a formula simplification. DAG size of input: 361 DAG size of output: 357 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)