./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/LarrazOliverasRodriguez-CarbonellRubio-FMCAD2013-Fig1.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/LarrazOliverasRodriguez-CarbonellRubio-FMCAD2013-Fig1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 33be026e9ca846df0a8faa91fc9c2bbf64ee20dbba0f4f48a9cd42fbefb372d5 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:58:34,633 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:58:34,708 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-12-02 19:58:34,714 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:58:34,715 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:58:34,739 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:58:34,740 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:58:34,741 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:58:34,741 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:58:34,742 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:58:34,742 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:58:34,743 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:58:34,743 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:58:34,744 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:58:34,744 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:58:34,745 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:58:34,745 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:58:34,746 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:58:34,746 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:58:34,747 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:58:34,747 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:58:34,748 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:58:34,749 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:58:34,749 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:58:34,750 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:58:34,750 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:58:34,751 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:58:34,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:58:34,752 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:58:34,752 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 19:58:34,752 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:58:34,753 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:58:34,753 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:58:34,753 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:58:34,754 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:58:34,754 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:58:34,754 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:58:34,754 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:58:34,754 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:58:34,755 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:58:34,755 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:58:34,755 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:58:34,755 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:58:34,755 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:58:34,756 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:58:34,756 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:58:34,756 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 33be026e9ca846df0a8faa91fc9c2bbf64ee20dbba0f4f48a9cd42fbefb372d5 [2023-12-02 19:58:34,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:58:34,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:58:34,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:58:34,992 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:58:34,992 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:58:34,994 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-crafted-lit/LarrazOliverasRodriguez-CarbonellRubio-FMCAD2013-Fig1.c [2023-12-02 19:58:37,759 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:58:37,932 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:58:37,932 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/sv-benchmarks/c/termination-crafted-lit/LarrazOliverasRodriguez-CarbonellRubio-FMCAD2013-Fig1.c [2023-12-02 19:58:37,939 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/data/6225e2b6c/29f577eb292340e7b62db7460f213e61/FLAGbbf1a1602 [2023-12-02 19:58:37,956 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/data/6225e2b6c/29f577eb292340e7b62db7460f213e61 [2023-12-02 19:58:37,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:58:37,960 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:58:37,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:58:37,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:58:37,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:58:37,968 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:58:37" (1/1) ... [2023-12-02 19:58:37,970 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16200a7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:37, skipping insertion in model container [2023-12-02 19:58:37,970 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:58:37" (1/1) ... [2023-12-02 19:58:37,992 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:58:38,143 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:58:38,149 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:58:38,160 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:58:38,175 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:58:38,175 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38 WrapperNode [2023-12-02 19:58:38,175 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:58:38,177 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:58:38,177 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:58:38,177 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:58:38,184 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,187 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,202 INFO L138 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 40 [2023-12-02 19:58:38,202 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:58:38,203 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:58:38,203 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:58:38,203 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:58:38,210 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,210 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,211 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,211 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,213 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,218 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,219 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,220 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,222 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:58:38,223 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:58:38,223 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:58:38,224 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:58:38,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (1/1) ... [2023-12-02 19:58:38,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:58:38,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:38,257 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:58:38,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:58:38,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:58:38,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:58:38,372 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:58:38,374 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:58:38,493 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:58:38,522 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:58:38,523 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-02 19:58:38,525 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:58:38 BoogieIcfgContainer [2023-12-02 19:58:38,525 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:58:38,529 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:58:38,529 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:58:38,533 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:58:38,533 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:58:37" (1/3) ... [2023-12-02 19:58:38,534 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5489e529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:58:38, skipping insertion in model container [2023-12-02 19:58:38,534 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:58:38" (2/3) ... [2023-12-02 19:58:38,535 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5489e529 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:58:38, skipping insertion in model container [2023-12-02 19:58:38,535 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:58:38" (3/3) ... [2023-12-02 19:58:38,536 INFO L112 eAbstractionObserver]: Analyzing ICFG LarrazOliverasRodriguez-CarbonellRubio-FMCAD2013-Fig1.c [2023-12-02 19:58:38,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:58:38,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-12-02 19:58:38,616 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:58:38,625 INFO L357 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, mHoare=true, 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;@1566d7bf, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:58:38,625 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-12-02 19:58:38,630 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 21 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) [2023-12-02 19:58:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 19:58:38,637 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:38,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 19:58:38,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:38,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:38,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2537489, now seen corresponding path program 1 times [2023-12-02 19:58:38,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:38,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573216222] [2023-12-02 19:58:38,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:38,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:38,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:38,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:38,827 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:38,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573216222] [2023-12-02 19:58:38,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573216222] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:38,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:38,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:58:38,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018559954] [2023-12-02 19:58:38,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:38,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:58:38,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:38,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:58:38,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:58:38,874 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 21 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) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:38,936 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-12-02 19:58:38,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:58:38,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 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 4 [2023-12-02 19:58:38,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:38,947 INFO L225 Difference]: With dead ends: 27 [2023-12-02 19:58:38,947 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 19:58:38,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:58:38,954 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 3 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:38,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:38,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 19:58:38,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-02 19:58:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-12-02 19:58:38,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2023-12-02 19:58:38,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:38,984 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-12-02 19:58:38,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-12-02 19:58:38,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:58:38,985 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:38,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:58:38,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:58:38,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:38,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:38,987 INFO L85 PathProgramCache]: Analyzing trace with hash 78662207, now seen corresponding path program 1 times [2023-12-02 19:58:38,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:38,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949023925] [2023-12-02 19:58:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:38,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,027 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949023925] [2023-12-02 19:58:39,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949023925] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:58:39,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930523935] [2023-12-02 19:58:39,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:58:39,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:58:39,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:58:39,031 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) 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) [2023-12-02 19:58:39,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,059 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2023-12-02 19:58:39,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:58:39,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) 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 [2023-12-02 19:58:39,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,061 INFO L225 Difference]: With dead ends: 22 [2023-12-02 19:58:39,061 INFO L226 Difference]: Without dead ends: 21 [2023-12-02 19:58:39,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:58:39,063 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 14 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-02 19:58:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-02 19:58:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.5714285714285714) 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) [2023-12-02 19:58:39,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-12-02 19:58:39,071 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 5 [2023-12-02 19:58:39,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,071 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-12-02 19:58:39,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) 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) [2023-12-02 19:58:39,072 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-12-02 19:58:39,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:58:39,073 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:58:39,073 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1715027665, now seen corresponding path program 1 times [2023-12-02 19:58:39,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075161933] [2023-12-02 19:58:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075161933] [2023-12-02 19:58:39,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075161933] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 19:58:39,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103075160] [2023-12-02 19:58:39,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 19:58:39,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 19:58:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:58:39,164 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,278 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2023-12-02 19:58:39,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:58:39,278 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:58:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,280 INFO L225 Difference]: With dead ends: 41 [2023-12-02 19:58:39,280 INFO L226 Difference]: Without dead ends: 40 [2023-12-02 19:58:39,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-02 19:58:39,282 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 22 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 17 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:58:39,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-02 19:58:39,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2023-12-02 19:58:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.619047619047619) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-12-02 19:58:39,289 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2023-12-02 19:58:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,290 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-12-02 19:58:39,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-12-02 19:58:39,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:58:39,291 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:58:39,291 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1715028575, now seen corresponding path program 1 times [2023-12-02 19:58:39,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535875787] [2023-12-02 19:58:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535875787] [2023-12-02 19:58:39,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535875787] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:58:39,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922125832] [2023-12-02 19:58:39,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:58:39,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:58:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,345 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,407 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2023-12-02 19:58:39,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:58:39,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-02 19:58:39,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,410 INFO L225 Difference]: With dead ends: 58 [2023-12-02 19:58:39,410 INFO L226 Difference]: Without dead ends: 56 [2023-12-02 19:58:39,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,412 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 24 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 19 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:39,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-12-02 19:58:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2023-12-02 19:58:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2023-12-02 19:58:39,426 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 7 [2023-12-02 19:58:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,427 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2023-12-02 19:58:39,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,427 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2023-12-02 19:58:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:58:39,427 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,428 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:58:39,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1626249991, now seen corresponding path program 1 times [2023-12-02 19:58:39,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187985916] [2023-12-02 19:58:39,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,506 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187985916] [2023-12-02 19:58:39,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187985916] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:58:39,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191470423] [2023-12-02 19:58:39,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:58:39,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:58:39,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,509 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2023-12-02 19:58:39,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,560 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2023-12-02 19:58:39,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:58:39,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 19:58:39,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,562 INFO L225 Difference]: With dead ends: 60 [2023-12-02 19:58:39,563 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 19:58:39,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,564 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 17 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:39,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 19:58:39,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 53. [2023-12-02 19:58:39,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.565217391304348) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2023-12-02 19:58:39,578 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 8 [2023-12-02 19:58:39,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,578 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2023-12-02 19:58:39,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2023-12-02 19:58:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2023-12-02 19:58:39,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:58:39,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,579 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:58:39,580 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1626278212, now seen corresponding path program 1 times [2023-12-02 19:58:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591700002] [2023-12-02 19:58:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,619 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591700002] [2023-12-02 19:58:39,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591700002] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:58:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306895028] [2023-12-02 19:58:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:58:39,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:58:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,622 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2023-12-02 19:58:39,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,682 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2023-12-02 19:58:39,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:58:39,683 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 19:58:39,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,684 INFO L225 Difference]: With dead ends: 97 [2023-12-02 19:58:39,684 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 19:58:39,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,686 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:39,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 19:58:39,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 85. [2023-12-02 19:58:39,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 78 states have (on average 1.5384615384615385) internal successors, (120), 84 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2023-12-02 19:58:39,703 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 8 [2023-12-02 19:58:39,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,703 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2023-12-02 19:58:39,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2023-12-02 19:58:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2023-12-02 19:58:39,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 19:58:39,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,704 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:58:39,705 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1124983043, now seen corresponding path program 1 times [2023-12-02 19:58:39,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470525101] [2023-12-02 19:58:39,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,742 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470525101] [2023-12-02 19:58:39,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470525101] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:58:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688579059] [2023-12-02 19:58:39,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:58:39,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:58:39,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:58:39,744 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2023-12-02 19:58:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,773 INFO L93 Difference]: Finished difference Result 85 states and 120 transitions. [2023-12-02 19:58:39,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:58:39,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) Word has length 9 [2023-12-02 19:58:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,775 INFO L225 Difference]: With dead ends: 85 [2023-12-02 19:58:39,775 INFO L226 Difference]: Without dead ends: 84 [2023-12-02 19:58:39,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-02 19:58:39,776 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:39,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-12-02 19:58:39,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2023-12-02 19:58:39,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.4615384615384615) internal successors, (114), 83 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 114 transitions. [2023-12-02 19:58:39,791 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 114 transitions. Word has length 9 [2023-12-02 19:58:39,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,791 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 114 transitions. [2023-12-02 19:58:39,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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) [2023-12-02 19:58:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 114 transitions. [2023-12-02 19:58:39,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-02 19:58:39,792 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,792 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:58:39,793 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,793 INFO L85 PathProgramCache]: Analyzing trace with hash 514736030, now seen corresponding path program 1 times [2023-12-02 19:58:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315327909] [2023-12-02 19:58:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,820 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315327909] [2023-12-02 19:58:39,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315327909] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:58:39,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:58:39,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:58:39,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895060693] [2023-12-02 19:58:39,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:58:39,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:58:39,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:39,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:58:39,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:58:39,822 INFO L87 Difference]: Start difference. First operand 84 states and 114 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2023-12-02 19:58:39,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:39,838 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2023-12-02 19:58:39,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:58:39,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-12-02 19:58:39,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:39,839 INFO L225 Difference]: With dead ends: 84 [2023-12-02 19:58:39,839 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 19:58:39,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:58:39,841 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:39,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 12 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:58:39,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 19:58:39,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2023-12-02 19:58:39,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 82 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 108 transitions. [2023-12-02 19:58:39,854 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 108 transitions. Word has length 10 [2023-12-02 19:58:39,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:39,855 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 108 transitions. [2023-12-02 19:58:39,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 2 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) [2023-12-02 19:58:39,855 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 108 transitions. [2023-12-02 19:58:39,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-02 19:58:39,856 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:39,856 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-02 19:58:39,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 19:58:39,856 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:39,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:39,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1939177669, now seen corresponding path program 1 times [2023-12-02 19:58:39,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:39,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155360878] [2023-12-02 19:58:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:39,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:39,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155360878] [2023-12-02 19:58:39,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155360878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:39,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006454102] [2023-12-02 19:58:39,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:39,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:39,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:39,922 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:39,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:58:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:39,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:58:39,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:40,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:40,083 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:40,160 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:40,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006454102] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:40,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479898161] [2023-12-02 19:58:40,180 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:58:40,180 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:40,184 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:40,190 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:40,190 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:40,463 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:40,745 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1204#(and (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= (+ 2147483649 |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|) 0) (<= |ULTIMATE.start_main_~z~0#1| 10000))' at error location [2023-12-02 19:58:40,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:40,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:40,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-02 19:58:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182109405] [2023-12-02 19:58:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:58:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:58:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2023-12-02 19:58:40,753 INFO L87 Difference]: Start difference. First operand 83 states and 108 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:41,290 INFO L93 Difference]: Finished difference Result 213 states and 297 transitions. [2023-12-02 19:58:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-12-02 19:58:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-02 19:58:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:41,292 INFO L225 Difference]: With dead ends: 213 [2023-12-02 19:58:41,292 INFO L226 Difference]: Without dead ends: 210 [2023-12-02 19:58:41,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1329, Unknown=0, NotChecked=0, Total=1722 [2023-12-02 19:58:41,295 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 199 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:41,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 21 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:58:41,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-12-02 19:58:41,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 109. [2023-12-02 19:58:41,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 106 states have (on average 1.2830188679245282) internal successors, (136), 108 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:41,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 136 transitions. [2023-12-02 19:58:41,313 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 136 transitions. Word has length 13 [2023-12-02 19:58:41,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:41,314 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 136 transitions. [2023-12-02 19:58:41,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:41,314 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 136 transitions. [2023-12-02 19:58:41,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 19:58:41,314 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:41,315 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 19:58:41,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:58:41,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:41,519 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:41,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:41,519 INFO L85 PathProgramCache]: Analyzing trace with hash -15034333, now seen corresponding path program 1 times [2023-12-02 19:58:41,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:41,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162979045] [2023-12-02 19:58:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:41,583 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162979045] [2023-12-02 19:58:41,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162979045] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:41,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744149941] [2023-12-02 19:58:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:41,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:41,585 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:41,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:58:41,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:41,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 19:58:41,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:41,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:41,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:41,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744149941] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:41,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [396552582] [2023-12-02 19:58:41,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:58:41,837 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:41,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:41,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:41,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:41,987 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:42,264 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1737#(and (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 9999) (<= |ULTIMATE.start_main_~z~0#1| 10000))' at error location [2023-12-02 19:58:42,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:42,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:42,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2023-12-02 19:58:42,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378800165] [2023-12-02 19:58:42,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:42,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:58:42,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:42,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:58:42,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-12-02 19:58:42,267 INFO L87 Difference]: Start difference. First operand 109 states and 136 transitions. Second operand has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:42,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:42,548 INFO L93 Difference]: Finished difference Result 228 states and 286 transitions. [2023-12-02 19:58:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 19:58:42,549 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-02 19:58:42,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:42,550 INFO L225 Difference]: With dead ends: 228 [2023-12-02 19:58:42,551 INFO L226 Difference]: Without dead ends: 227 [2023-12-02 19:58:42,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:58:42,552 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 133 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:42,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 26 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:58:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-12-02 19:58:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 169. [2023-12-02 19:58:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 166 states have (on average 1.2469879518072289) internal successors, (207), 168 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 207 transitions. [2023-12-02 19:58:42,577 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 207 transitions. Word has length 14 [2023-12-02 19:58:42,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:42,577 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 207 transitions. [2023-12-02 19:58:42,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.076923076923077) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 207 transitions. [2023-12-02 19:58:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 19:58:42,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:42,579 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:42,585 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-02 19:58:42,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:42,782 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:42,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:42,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1474545828, now seen corresponding path program 1 times [2023-12-02 19:58:42,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:42,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662411466] [2023-12-02 19:58:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:42,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:42,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:42,829 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662411466] [2023-12-02 19:58:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662411466] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747213837] [2023-12-02 19:58:42,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:42,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:42,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:42,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:58:42,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:42,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-02 19:58:42,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:42,898 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:42,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:42,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747213837] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:42,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [135466052] [2023-12-02 19:58:42,939 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:58:42,940 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:42,940 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:42,940 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:42,940 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:43,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:43,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2352#(and (<= (+ |ULTIMATE.start_main_~y~0#1| 1) |ULTIMATE.start_main_~z~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~z~0#1| 9999) (<= 2147483647 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:58:43,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:43,215 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:43,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 19:58:43,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756585813] [2023-12-02 19:58:43,216 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:43,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:58:43,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:43,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:58:43,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:58:43,218 INFO L87 Difference]: Start difference. First operand 169 states and 207 transitions. Second operand has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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) [2023-12-02 19:58:43,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:43,324 INFO L93 Difference]: Finished difference Result 377 states and 472 transitions. [2023-12-02 19:58:43,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 19:58:43,325 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-12-02 19:58:43,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:43,328 INFO L225 Difference]: With dead ends: 377 [2023-12-02 19:58:43,328 INFO L226 Difference]: Without dead ends: 376 [2023-12-02 19:58:43,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:58:43,330 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:43,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 31 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:58:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2023-12-02 19:58:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 276. [2023-12-02 19:58:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 273 states have (on average 1.2380952380952381) internal successors, (338), 275 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:43,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 338 transitions. [2023-12-02 19:58:43,358 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 338 transitions. Word has length 18 [2023-12-02 19:58:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:43,359 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 338 transitions. [2023-12-02 19:58:43,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 5.0) internal successors, (35), 8 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) [2023-12-02 19:58:43,359 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 338 transitions. [2023-12-02 19:58:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:58:43,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:43,360 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 19:58:43,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:58:43,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:43,566 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:43,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:43,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1807591057, now seen corresponding path program 1 times [2023-12-02 19:58:43,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:43,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608037950] [2023-12-02 19:58:43,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:43,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:58:43,652 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:43,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608037950] [2023-12-02 19:58:43,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608037950] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:43,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088620900] [2023-12-02 19:58:43,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:43,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:43,653 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:43,654 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:43,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:58:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:43,704 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:58:43,706 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:43,832 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:58:43,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-02 19:58:43,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088620900] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:43,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1865450752] [2023-12-02 19:58:43,946 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 19:58:43,946 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:43,946 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:43,947 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:43,947 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:44,482 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:44,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3322#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 19:58:44,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:44,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:44,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 18 [2023-12-02 19:58:44,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687105198] [2023-12-02 19:58:44,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:44,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-02 19:58:44,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:44,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-02 19:58:44,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:58:44,810 INFO L87 Difference]: Start difference. First operand 276 states and 338 transitions. Second operand has 19 states, 18 states have (on average 3.888888888888889) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:45,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:45,435 INFO L93 Difference]: Finished difference Result 510 states and 638 transitions. [2023-12-02 19:58:45,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-02 19:58:45,436 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.888888888888889) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 19:58:45,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:45,439 INFO L225 Difference]: With dead ends: 510 [2023-12-02 19:58:45,439 INFO L226 Difference]: Without dead ends: 508 [2023-12-02 19:58:45,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=559, Invalid=1991, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 19:58:45,442 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 75 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:45,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 0 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:58:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2023-12-02 19:58:45,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 310. [2023-12-02 19:58:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 307 states have (on average 1.218241042345277) internal successors, (374), 309 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:45,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 374 transitions. [2023-12-02 19:58:45,477 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 374 transitions. Word has length 24 [2023-12-02 19:58:45,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:45,477 INFO L495 AbstractCegarLoop]: Abstraction has 310 states and 374 transitions. [2023-12-02 19:58:45,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.888888888888889) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:45,478 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 374 transitions. [2023-12-02 19:58:45,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-02 19:58:45,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:45,479 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 19:58:45,485 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:58:45,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 19:58:45,681 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:45,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:45,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1823824132, now seen corresponding path program 2 times [2023-12-02 19:58:45,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:45,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105179145] [2023-12-02 19:58:45,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:45,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:45,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:45,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105179145] [2023-12-02 19:58:45,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105179145] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:45,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790517677] [2023-12-02 19:58:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:58:45,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:45,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:45,789 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:45,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:58:45,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 19:58:45,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:58:45,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:58:45,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:45,984 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:45,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:46,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790517677] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:46,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1298841457] [2023-12-02 19:58:46,128 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 19:58:46,128 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:46,128 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:46,128 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:46,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:46,574 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:46,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4587#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 19:58:46,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:46,914 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:46,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-12-02 19:58:46,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410319720] [2023-12-02 19:58:46,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:46,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-02 19:58:46,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:46,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-02 19:58:46,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2023-12-02 19:58:46,917 INFO L87 Difference]: Start difference. First operand 310 states and 374 transitions. Second operand has 22 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:48,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:48,216 INFO L93 Difference]: Finished difference Result 1536 states and 1824 transitions. [2023-12-02 19:58:48,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-12-02 19:58:48,217 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 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 29 [2023-12-02 19:58:48,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:48,226 INFO L225 Difference]: With dead ends: 1536 [2023-12-02 19:58:48,226 INFO L226 Difference]: Without dead ends: 1535 [2023-12-02 19:58:48,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2937 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1726, Invalid=6106, Unknown=0, NotChecked=0, Total=7832 [2023-12-02 19:58:48,231 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 257 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:48,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 27 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 19:58:48,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2023-12-02 19:58:48,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 714. [2023-12-02 19:58:48,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 711 states have (on average 1.2151898734177216) internal successors, (864), 713 states have internal predecessors, (864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 864 transitions. [2023-12-02 19:58:48,317 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 864 transitions. Word has length 29 [2023-12-02 19:58:48,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:48,317 INFO L495 AbstractCegarLoop]: Abstraction has 714 states and 864 transitions. [2023-12-02 19:58:48,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 4.0476190476190474) internal successors, (85), 22 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 864 transitions. [2023-12-02 19:58:48,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-02 19:58:48,319 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:48,319 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1] [2023-12-02 19:58:48,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:58:48,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 19:58:48,522 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:48,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:48,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1434551457, now seen corresponding path program 2 times [2023-12-02 19:58:48,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:48,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75053511] [2023-12-02 19:58:48,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:48,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:48,675 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:48,675 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:48,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75053511] [2023-12-02 19:58:48,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75053511] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:48,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030003976] [2023-12-02 19:58:48,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:58:48,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:48,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:48,677 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:48,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:58:48,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 19:58:48,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:58:48,719 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-02 19:58:48,720 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:48,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:49,205 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:49,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030003976] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:49,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [656030338] [2023-12-02 19:58:49,207 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:58:49,207 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:49,208 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:49,208 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:49,208 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:49,283 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:49,631 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7657#(and (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 9999) (<= |ULTIMATE.start_main_~z~0#1| 10000))' at error location [2023-12-02 19:58:49,631 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:49,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:49,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-12-02 19:58:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779070895] [2023-12-02 19:58:49,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:49,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 19:58:49,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:49,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 19:58:49,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=1285, Unknown=0, NotChecked=0, Total=1560 [2023-12-02 19:58:49,634 INFO L87 Difference]: Start difference. First operand 714 states and 864 transitions. Second operand has 32 states, 31 states have (on average 3.032258064516129) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:50,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:50,966 INFO L93 Difference]: Finished difference Result 1328 states and 1574 transitions. [2023-12-02 19:58:50,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-12-02 19:58:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.032258064516129) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 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 32 [2023-12-02 19:58:50,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:50,973 INFO L225 Difference]: With dead ends: 1328 [2023-12-02 19:58:50,973 INFO L226 Difference]: Without dead ends: 1327 [2023-12-02 19:58:50,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1784 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1347, Invalid=3909, Unknown=0, NotChecked=0, Total=5256 [2023-12-02 19:58:50,977 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 506 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:50,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 95 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:58:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2023-12-02 19:58:51,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 885. [2023-12-02 19:58:51,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 882 states have (on average 1.209750566893424) internal successors, (1067), 884 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:51,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1067 transitions. [2023-12-02 19:58:51,076 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1067 transitions. Word has length 32 [2023-12-02 19:58:51,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:51,077 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1067 transitions. [2023-12-02 19:58:51,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.032258064516129) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:51,077 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1067 transitions. [2023-12-02 19:58:51,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-02 19:58:51,078 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:51,078 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1] [2023-12-02 19:58:51,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:58:51,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-12-02 19:58:51,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:51,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:51,284 INFO L85 PathProgramCache]: Analyzing trace with hash -80550429, now seen corresponding path program 1 times [2023-12-02 19:58:51,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:51,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630803529] [2023-12-02 19:58:51,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:51,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-02 19:58:51,326 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:51,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630803529] [2023-12-02 19:58:51,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630803529] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:51,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788472298] [2023-12-02 19:58:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:51,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:51,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:51,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:51,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:58:51,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:51,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:58:51,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:51,455 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:51,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:51,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788472298] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:51,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1925471494] [2023-12-02 19:58:51,575 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:58:51,575 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:51,575 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:51,576 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:51,576 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:51,665 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:51,950 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10683#(and (<= (+ |ULTIMATE.start_main_~x~0#1| 2147483648) 0) (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= |ULTIMATE.start_main_~z~0#1| 10000))' at error location [2023-12-02 19:58:51,950 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:51,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:51,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 15 [2023-12-02 19:58:51,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676168151] [2023-12-02 19:58:51,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:51,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:58:51,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:51,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:58:51,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2023-12-02 19:58:51,953 INFO L87 Difference]: Start difference. First operand 885 states and 1067 transitions. Second operand has 16 states, 15 states have (on average 5.533333333333333) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:52,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:52,931 INFO L93 Difference]: Finished difference Result 3179 states and 3900 transitions. [2023-12-02 19:58:52,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-02 19:58:52,933 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.533333333333333) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-12-02 19:58:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:52,948 INFO L225 Difference]: With dead ends: 3179 [2023-12-02 19:58:52,949 INFO L226 Difference]: Without dead ends: 2975 [2023-12-02 19:58:52,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=577, Invalid=1679, Unknown=0, NotChecked=0, Total=2256 [2023-12-02 19:58:52,954 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 242 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:52,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 22 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:58:52,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2023-12-02 19:58:53,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 444. [2023-12-02 19:58:53,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 442 states have (on average 1.1855203619909502) internal successors, (524), 443 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:53,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 524 transitions. [2023-12-02 19:58:53,079 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 524 transitions. Word has length 34 [2023-12-02 19:58:53,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:53,079 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 524 transitions. [2023-12-02 19:58:53,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.533333333333333) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:53,079 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 524 transitions. [2023-12-02 19:58:53,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-02 19:58:53,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:53,080 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1] [2023-12-02 19:58:53,086 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-02 19:58:53,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-02 19:58:53,286 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:53,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:53,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1920212836, now seen corresponding path program 2 times [2023-12-02 19:58:53,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:53,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037088754] [2023-12-02 19:58:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:53,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:53,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:53,388 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:53,389 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037088754] [2023-12-02 19:58:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037088754] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287292750] [2023-12-02 19:58:53,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:58:53,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:53,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:53,390 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:53,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:58:53,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 19:58:53,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:58:53,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 19:58:53,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:53,482 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:53,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287292750] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:53,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1319004770] [2023-12-02 19:58:53,594 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:58:53,594 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:53,595 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:53,595 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:53,595 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:53,649 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:53,800 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '15516#(and (<= (+ |ULTIMATE.start_main_~y~0#1| 1) |ULTIMATE.start_main_~z~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~z~0#1| 9999) (<= 2147483647 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:58:53,800 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:53,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:53,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-12-02 19:58:53,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064405033] [2023-12-02 19:58:53,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:53,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:58:53,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:53,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:58:53,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2023-12-02 19:58:53,802 INFO L87 Difference]: Start difference. First operand 444 states and 524 transitions. Second operand has 16 states, 15 states have (on average 5.0) internal successors, (75), 16 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) [2023-12-02 19:58:54,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:58:54,199 INFO L93 Difference]: Finished difference Result 1705 states and 2069 transitions. [2023-12-02 19:58:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-02 19:58:54,200 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.0) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2023-12-02 19:58:54,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:58:54,207 INFO L225 Difference]: With dead ends: 1705 [2023-12-02 19:58:54,207 INFO L226 Difference]: Without dead ends: 1704 [2023-12-02 19:58:54,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2023-12-02 19:58:54,209 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 161 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:58:54,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 63 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:58:54,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1704 states. [2023-12-02 19:58:54,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1704 to 1202. [2023-12-02 19:58:54,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1202 states, 1200 states have (on average 1.1741666666666666) internal successors, (1409), 1201 states have internal predecessors, (1409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:58:54,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1202 states to 1202 states and 1409 transitions. [2023-12-02 19:58:54,465 INFO L78 Accepts]: Start accepts. Automaton has 1202 states and 1409 transitions. Word has length 38 [2023-12-02 19:58:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:58:54,465 INFO L495 AbstractCegarLoop]: Abstraction has 1202 states and 1409 transitions. [2023-12-02 19:58:54,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.0) internal successors, (75), 16 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) [2023-12-02 19:58:54,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1202 states and 1409 transitions. [2023-12-02 19:58:54,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 19:58:54,467 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:58:54,467 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1] [2023-12-02 19:58:54,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-02 19:58:54,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:54,671 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:58:54,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:58:54,671 INFO L85 PathProgramCache]: Analyzing trace with hash -378703026, now seen corresponding path program 3 times [2023-12-02 19:58:54,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:58:54,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221501908] [2023-12-02 19:58:54,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:58:54,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:58:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:58:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:54,887 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:58:54,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221501908] [2023-12-02 19:58:54,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221501908] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:58:54,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121612925] [2023-12-02 19:58:54,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:58:54,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:58:54,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:58:54,889 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:58:54,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:58:54,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:58:54,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:58:54,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjunts are in the unsatisfiable core [2023-12-02 19:58:54,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:58:55,215 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:55,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:58:55,472 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:58:55,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121612925] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:58:55,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [644881393] [2023-12-02 19:58:55,474 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 19:58:55,474 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:58:55,474 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:58:55,474 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:58:55,474 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:58:55,769 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:58:56,099 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '19437#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 19:58:56,099 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:58:56,099 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:58:56,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 46 [2023-12-02 19:58:56,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054686406] [2023-12-02 19:58:56,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:58:56,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-12-02 19:58:56,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:58:56,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-12-02 19:58:56,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2023-12-02 19:58:56,101 INFO L87 Difference]: Start difference. First operand 1202 states and 1409 transitions. Second operand has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 47 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:14,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:14,468 INFO L93 Difference]: Finished difference Result 16805 states and 19602 transitions. [2023-12-02 19:59:14,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 455 states. [2023-12-02 19:59:14,468 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 47 states have internal predecessors, (133), 0 states have call successors, (0), 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 45 [2023-12-02 19:59:14,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:14,526 INFO L225 Difference]: With dead ends: 16805 [2023-12-02 19:59:14,526 INFO L226 Difference]: Without dead ends: 16804 [2023-12-02 19:59:14,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 501 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128416 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=57106, Invalid=195400, Unknown=0, NotChecked=0, Total=252506 [2023-12-02 19:59:14,548 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1474 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 4057 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1474 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 4422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 4057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:14,548 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1474 Valid, 14 Invalid, 4422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 4057 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 19:59:14,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16804 states. [2023-12-02 19:59:16,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16804 to 6251. [2023-12-02 19:59:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6251 states, 6249 states have (on average 1.186269803168507) internal successors, (7413), 6250 states have internal predecessors, (7413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:16,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6251 states to 6251 states and 7413 transitions. [2023-12-02 19:59:16,337 INFO L78 Accepts]: Start accepts. Automaton has 6251 states and 7413 transitions. Word has length 45 [2023-12-02 19:59:16,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:16,338 INFO L495 AbstractCegarLoop]: Abstraction has 6251 states and 7413 transitions. [2023-12-02 19:59:16,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.891304347826087) internal successors, (133), 47 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:16,338 INFO L276 IsEmpty]: Start isEmpty. Operand 6251 states and 7413 transitions. [2023-12-02 19:59:16,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-02 19:59:16,340 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:16,340 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 3, 3, 3, 3, 3, 1, 1, 1] [2023-12-02 19:59:16,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-02 19:59:16,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 19:59:16,541 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:59:16,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:16,541 INFO L85 PathProgramCache]: Analyzing trace with hash 219146390, now seen corresponding path program 4 times [2023-12-02 19:59:16,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:16,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443726949] [2023-12-02 19:59:16,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:16,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:16,922 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443726949] [2023-12-02 19:59:16,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443726949] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:16,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827677786] [2023-12-02 19:59:16,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:59:16,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:16,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:16,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:16,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:59:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:16,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-02 19:59:16,977 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:17,478 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:17,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:17,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827677786] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:17,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [270874999] [2023-12-02 19:59:17,908 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 19:59:17,908 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:59:17,908 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:59:17,909 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:59:17,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:59:18,209 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:59:18,670 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '48974#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 19:59:18,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:59:18,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:59:18,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 52 [2023-12-02 19:59:18,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655521104] [2023-12-02 19:59:18,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:59:18,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-12-02 19:59:18,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:18,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-12-02 19:59:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=588, Invalid=3318, Unknown=0, NotChecked=0, Total=3906 [2023-12-02 19:59:18,672 INFO L87 Difference]: Start difference. First operand 6251 states and 7413 transitions. Second operand has 53 states, 52 states have (on average 3.3653846153846154) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:40,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:59:40,034 INFO L93 Difference]: Finished difference Result 9773 states and 11467 transitions. [2023-12-02 19:59:40,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 410 states. [2023-12-02 19:59:40,034 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 3.3653846153846154) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-12-02 19:59:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:59:40,064 INFO L225 Difference]: With dead ends: 9773 [2023-12-02 19:59:40,064 INFO L226 Difference]: Without dead ends: 9772 [2023-12-02 19:59:40,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 453 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103611 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=44955, Invalid=161615, Unknown=0, NotChecked=0, Total=206570 [2023-12-02 19:59:40,076 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 2393 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 2801 mSolverCounterSat, 871 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2393 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 3672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 871 IncrementalHoareTripleChecker+Valid, 2801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:59:40,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2393 Valid, 206 Invalid, 3672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [871 Valid, 2801 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 19:59:40,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9772 states. [2023-12-02 19:59:42,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9772 to 6936. [2023-12-02 19:59:42,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6936 states, 6934 states have (on average 1.1848860686472455) internal successors, (8216), 6935 states have internal predecessors, (8216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6936 states to 6936 states and 8216 transitions. [2023-12-02 19:59:42,122 INFO L78 Accepts]: Start accepts. Automaton has 6936 states and 8216 transitions. Word has length 59 [2023-12-02 19:59:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:59:42,123 INFO L495 AbstractCegarLoop]: Abstraction has 6936 states and 8216 transitions. [2023-12-02 19:59:42,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 3.3653846153846154) internal successors, (175), 53 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:59:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 6936 states and 8216 transitions. [2023-12-02 19:59:42,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-12-02 19:59:42,126 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:59:42,126 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 4, 4, 4, 4, 4, 3, 1, 1, 1] [2023-12-02 19:59:42,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-02 19:59:42,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 19:59:42,326 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 19:59:42,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:59:42,327 INFO L85 PathProgramCache]: Analyzing trace with hash 139750936, now seen corresponding path program 5 times [2023-12-02 19:59:42,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:59:42,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425958406] [2023-12-02 19:59:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:59:42,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:59:42,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:59:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:42,581 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:59:42,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425958406] [2023-12-02 19:59:42,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425958406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:59:42,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132192084] [2023-12-02 19:59:42,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:59:42,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:59:42,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:59:42,582 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:59:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:59:42,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-02 19:59:42,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:59:42,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 19:59:42,636 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:59:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:42,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:59:43,273 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:59:43,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132192084] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:59:43,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [881317339] [2023-12-02 19:59:43,275 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 19:59:43,275 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:59:43,276 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:59:43,276 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:59:43,276 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:59:43,567 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:59:43,880 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '71103#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 19:59:43,880 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:59:43,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:59:43,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 15] total 50 [2023-12-02 19:59:43,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767603991] [2023-12-02 19:59:43,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:59:43,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-02 19:59:43,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:59:43,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-02 19:59:43,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=592, Invalid=3068, Unknown=0, NotChecked=0, Total=3660 [2023-12-02 19:59:43,882 INFO L87 Difference]: Start difference. First operand 6936 states and 8216 transitions. Second operand has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:00:03,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:00:03,980 INFO L93 Difference]: Finished difference Result 15796 states and 18440 transitions. [2023-12-02 20:00:03,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 467 states. [2023-12-02 20:00:03,981 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 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 61 [2023-12-02 20:00:03,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:00:04,004 INFO L225 Difference]: With dead ends: 15796 [2023-12-02 20:00:04,005 INFO L226 Difference]: Without dead ends: 15795 [2023-12-02 20:00:04,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 510 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137560 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=51064, Invalid=210568, Unknown=0, NotChecked=0, Total=261632 [2023-12-02 20:00:04,017 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 1920 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 629 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1920 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 629 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:00:04,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1920 Valid, 50 Invalid, 1879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [629 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 20:00:04,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15795 states. [2023-12-02 20:00:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15795 to 7290. [2023-12-02 20:00:06,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7290 states, 7288 states have (on average 1.1831778265642152) internal successors, (8623), 7289 states have internal predecessors, (8623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:00:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7290 states to 7290 states and 8623 transitions. [2023-12-02 20:00:06,185 INFO L78 Accepts]: Start accepts. Automaton has 7290 states and 8623 transitions. Word has length 61 [2023-12-02 20:00:06,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:00:06,186 INFO L495 AbstractCegarLoop]: Abstraction has 7290 states and 8623 transitions. [2023-12-02 20:00:06,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 3.62) internal successors, (181), 51 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:00:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7290 states and 8623 transitions. [2023-12-02 20:00:06,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-12-02 20:00:06,189 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:00:06,189 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 5, 5, 5, 5, 5, 4, 1, 1, 1] [2023-12-02 20:00:06,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 20:00:06,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:00:06,389 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:00:06,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:00:06,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1935665506, now seen corresponding path program 6 times [2023-12-02 20:00:06,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:00:06,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594605697] [2023-12-02 20:00:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:00:06,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:00:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:00:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:06,739 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:00:06,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594605697] [2023-12-02 20:00:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594605697] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:00:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846424669] [2023-12-02 20:00:06,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:00:06,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:00:06,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:00:06,741 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:00:06,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 20:00:06,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:00:06,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:00:06,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-02 20:00:06,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:00:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:07,412 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:00:08,135 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:00:08,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846424669] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:00:08,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [316597383] [2023-12-02 20:00:08,137 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:00:08,137 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:00:08,137 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:00:08,138 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:00:08,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:00:08,398 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:00:08,820 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '101115#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:00:08,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:00:08,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:00:08,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 82 [2023-12-02 20:00:08,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761595465] [2023-12-02 20:00:08,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:00:08,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-12-02 20:00:08,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:00:08,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-12-02 20:00:08,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1408, Invalid=7148, Unknown=0, NotChecked=0, Total=8556 [2023-12-02 20:00:08,824 INFO L87 Difference]: Start difference. First operand 7290 states and 8623 transitions. Second operand has 83 states, 82 states have (on average 2.792682926829268) internal successors, (229), 83 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:02:21,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:02:21,134 INFO L93 Difference]: Finished difference Result 116805 states and 139182 transitions. [2023-12-02 20:02:21,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1525 states. [2023-12-02 20:02:21,135 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 2.792682926829268) internal successors, (229), 83 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-12-02 20:02:21,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:02:21,306 INFO L225 Difference]: With dead ends: 116805 [2023-12-02 20:02:21,306 INFO L226 Difference]: Without dead ends: 116803 [2023-12-02 20:02:21,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1767 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 1600 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1436478 ImplicationChecksByTransitivity, 80.0s TimeCoverageRelationStatistics Valid=540318, Invalid=2024484, Unknown=0, NotChecked=0, Total=2564802 [2023-12-02 20:02:21,452 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 5569 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 17546 mSolverCounterSat, 1501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5569 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 19047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1501 IncrementalHoareTripleChecker+Valid, 17546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:02:21,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5569 Valid, 17 Invalid, 19047 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1501 Valid, 17546 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2023-12-02 20:02:21,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116803 states. [2023-12-02 20:02:33,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116803 to 39986. [2023-12-02 20:02:33,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39986 states, 39984 states have (on average 1.195203081232493) internal successors, (47789), 39985 states have internal predecessors, (47789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:02:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39986 states to 39986 states and 47789 transitions. [2023-12-02 20:02:33,983 INFO L78 Accepts]: Start accepts. Automaton has 39986 states and 47789 transitions. Word has length 77 [2023-12-02 20:02:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:02:33,983 INFO L495 AbstractCegarLoop]: Abstraction has 39986 states and 47789 transitions. [2023-12-02 20:02:33,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 2.792682926829268) internal successors, (229), 83 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:02:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 39986 states and 47789 transitions. [2023-12-02 20:02:33,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-02 20:02:33,988 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:02:33,988 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1] [2023-12-02 20:02:33,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-02 20:02:34,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:34,189 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:02:34,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:02:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash -190328036, now seen corresponding path program 3 times [2023-12-02 20:02:34,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:02:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10970423] [2023-12-02 20:02:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:02:34,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:02:34,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:02:34,401 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:34,401 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:02:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10970423] [2023-12-02 20:02:34,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10970423] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:02:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809505555] [2023-12-02 20:02:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:02:34,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:02:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:02:34,403 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:02:34,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 20:02:34,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:02:34,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:02:34,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-02 20:02:34,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:02:34,568 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:34,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:02:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:02:34,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809505555] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:02:34,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1306231941] [2023-12-02 20:02:34,849 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 20:02:34,849 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:02:34,849 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:02:34,849 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:02:34,849 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:02:34,895 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:02:35,040 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '297743#(and (<= (+ |ULTIMATE.start_main_~y~0#1| 1) |ULTIMATE.start_main_~z~0#1|) (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~z~0#1| 9999) (<= 2147483647 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 20:02:35,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:02:35,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:02:35,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-12-02 20:02:35,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983307485] [2023-12-02 20:02:35,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:02:35,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 20:02:35,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:02:35,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 20:02:35,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=907, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 20:02:35,042 INFO L87 Difference]: Start difference. First operand 39986 states and 47789 transitions. Second operand has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:10,165 INFO L93 Difference]: Finished difference Result 131012 states and 160395 transitions. [2023-12-02 20:03:10,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-02 20:03:10,165 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2023-12-02 20:03:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:10,359 INFO L225 Difference]: With dead ends: 131012 [2023-12-02 20:03:10,359 INFO L226 Difference]: Without dead ends: 131011 [2023-12-02 20:03:10,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=575, Invalid=907, Unknown=0, NotChecked=0, Total=1482 [2023-12-02 20:03:10,376 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 430 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 430 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:10,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [430 Valid, 127 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:03:10,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131011 states. [2023-12-02 20:03:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131011 to 78930. [2023-12-02 20:03:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78930 states, 78928 states have (on average 1.1843578958037706) internal successors, (93479), 78929 states have internal predecessors, (93479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78930 states to 78930 states and 93479 transitions. [2023-12-02 20:03:32,806 INFO L78 Accepts]: Start accepts. Automaton has 78930 states and 93479 transitions. Word has length 78 [2023-12-02 20:03:32,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:32,806 INFO L495 AbstractCegarLoop]: Abstraction has 78930 states and 93479 transitions. [2023-12-02 20:03:32,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 5.0) internal successors, (155), 32 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:32,806 INFO L276 IsEmpty]: Start isEmpty. Operand 78930 states and 93479 transitions. [2023-12-02 20:03:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 20:03:32,812 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:32,812 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 4, 4, 4, 4, 4, 3, 1, 1, 1] [2023-12-02 20:03:32,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-12-02 20:03:33,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:33,013 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:03:33,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash 326631951, now seen corresponding path program 7 times [2023-12-02 20:03:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:33,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829061415] [2023-12-02 20:03:33,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 286 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:33,356 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829061415] [2023-12-02 20:03:33,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829061415] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919515379] [2023-12-02 20:03:33,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 20:03:33,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:33,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:33,358 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:33,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 20:03:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:33,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:03:33,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:33,580 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 107 proven. 21 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-02 20:03:33,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:33,800 INFO L134 CoverageAnalysis]: Checked inductivity of 414 backedges. 107 proven. 21 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2023-12-02 20:03:33,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919515379] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:33,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1809281761] [2023-12-02 20:03:33,802 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:03:33,802 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:33,802 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:33,802 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:33,802 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:34,063 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:34,499 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '564815#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:03:34,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:03:34,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:34,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11, 11] total 40 [2023-12-02 20:03:34,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380362512] [2023-12-02 20:03:34,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:03:34,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-12-02 20:03:34,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:34,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-12-02 20:03:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=2212, Unknown=0, NotChecked=0, Total=2450 [2023-12-02 20:03:34,501 INFO L87 Difference]: Start difference. First operand 78930 states and 93479 transitions. Second operand has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:53,494 INFO L93 Difference]: Finished difference Result 107265 states and 126532 transitions. [2023-12-02 20:03:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2023-12-02 20:03:53,494 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-12-02 20:03:53,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:53,497 INFO L225 Difference]: With dead ends: 107265 [2023-12-02 20:03:53,497 INFO L226 Difference]: Without dead ends: 1459 [2023-12-02 20:03:53,549 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 279 SyntacticMatches, 1 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14222 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8684, Invalid=42166, Unknown=0, NotChecked=0, Total=50850 [2023-12-02 20:03:53,550 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 177 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 7257 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 7306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:53,550 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 143 Invalid, 7306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7257 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 20:03:53,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2023-12-02 20:03:53,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 268. [2023-12-02 20:03:53,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 266 states have (on average 1.1353383458646618) internal successors, (302), 267 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 302 transitions. [2023-12-02 20:03:53,705 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 302 transitions. Word has length 86 [2023-12-02 20:03:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:53,705 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 302 transitions. [2023-12-02 20:03:53,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.525) internal successors, (141), 40 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 302 transitions. [2023-12-02 20:03:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 20:03:53,706 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:53,706 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2023-12-02 20:03:53,710 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 20:03:53,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-12-02 20:03:53,907 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:03:53,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:53,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1079581372, now seen corresponding path program 8 times [2023-12-02 20:03:53,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:53,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556790469] [2023-12-02 20:03:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:53,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:53,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:03:54,259 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:54,259 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:03:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556790469] [2023-12-02 20:03:54,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556790469] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:03:54,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951201083] [2023-12-02 20:03:54,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:03:54,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:54,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:03:54,261 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:03:54,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 20:03:54,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-02 20:03:54,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:03:54,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-02 20:03:54,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:03:54,777 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:54,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:03:55,277 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:03:55,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951201083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:03:55,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1922983035] [2023-12-02 20:03:55,278 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:03:55,278 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:03:55,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:03:55,279 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:03:55,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:03:55,563 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:03:55,927 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '701861#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:03:55,927 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:03:55,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:03:55,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 57 [2023-12-02 20:03:55,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526716413] [2023-12-02 20:03:55,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:03:55,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-12-02 20:03:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:03:55,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-12-02 20:03:55,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=949, Invalid=3607, Unknown=0, NotChecked=0, Total=4556 [2023-12-02 20:03:55,930 INFO L87 Difference]: Start difference. First operand 268 states and 302 transitions. Second operand has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:03:59,556 INFO L93 Difference]: Finished difference Result 671 states and 707 transitions. [2023-12-02 20:03:59,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2023-12-02 20:03:59,556 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 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 89 [2023-12-02 20:03:59,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:03:59,557 INFO L225 Difference]: With dead ends: 671 [2023-12-02 20:03:59,557 INFO L226 Difference]: Without dead ends: 670 [2023-12-02 20:03:59,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9722 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=6652, Invalid=20738, Unknown=0, NotChecked=0, Total=27390 [2023-12-02 20:03:59,560 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 1356 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1356 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:03:59,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1356 Valid, 53 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:03:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2023-12-02 20:03:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 268. [2023-12-02 20:03:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 266 states have (on average 1.1390977443609023) internal successors, (303), 267 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 303 transitions. [2023-12-02 20:03:59,716 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 303 transitions. Word has length 89 [2023-12-02 20:03:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:03:59,716 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 303 transitions. [2023-12-02 20:03:59,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 4.649122807017544) internal successors, (265), 58 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:03:59,717 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 303 transitions. [2023-12-02 20:03:59,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 20:03:59,717 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:03:59,717 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 1, 1, 1] [2023-12-02 20:03:59,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 20:03:59,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:03:59,918 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:03:59,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:03:59,919 INFO L85 PathProgramCache]: Analyzing trace with hash -210925883, now seen corresponding path program 3 times [2023-12-02 20:03:59,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:03:59,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080413705] [2023-12-02 20:03:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:03:59,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:03:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:00,386 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:00,387 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:00,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080413705] [2023-12-02 20:04:00,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080413705] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:00,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013113498] [2023-12-02 20:04:00,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:04:00,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:00,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:00,388 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:00,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 20:04:00,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:04:00,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:04:00,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 20:04:00,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:01,615 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:01,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:02,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013113498] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:02,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [415600018] [2023-12-02 20:04:02,837 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 20:04:02,837 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:02,838 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:02,838 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:02,838 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:02,878 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:04,283 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '703887#(and (<= 0 (+ |ULTIMATE.start_main_~z~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_main_~x~0#1| 2147483648)) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)) (<= |ULTIMATE.start_main_~x~0#1| 9999) (<= |ULTIMATE.start_main_~z~0#1| 10000))' at error location [2023-12-02 20:04:04,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:04,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:04:04,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 91 [2023-12-02 20:04:04,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402465824] [2023-12-02 20:04:04,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:04,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-12-02 20:04:04,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:04,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-12-02 20:04:04,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1663, Invalid=8039, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 20:04:04,286 INFO L87 Difference]: Start difference. First operand 268 states and 303 transitions. Second operand has 92 states, 91 states have (on average 3.010989010989011) internal successors, (274), 92 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:12,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:12,877 INFO L93 Difference]: Finished difference Result 659 states and 709 transitions. [2023-12-02 20:04:12,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-12-02 20:04:12,877 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 3.010989010989011) internal successors, (274), 92 states have internal predecessors, (274), 0 states have call successors, (0), 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 92 [2023-12-02 20:04:12,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:12,878 INFO L225 Difference]: With dead ends: 659 [2023-12-02 20:04:12,878 INFO L226 Difference]: Without dead ends: 658 [2023-12-02 20:04:12,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 193 SyntacticMatches, 15 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12715 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=8715, Invalid=24227, Unknown=0, NotChecked=0, Total=32942 [2023-12-02 20:04:12,881 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 613 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 3446 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 3712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:12,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 181 Invalid, 3712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 3446 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-02 20:04:12,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2023-12-02 20:04:13,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 364. [2023-12-02 20:04:13,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 362 states have (on average 1.1022099447513811) internal successors, (399), 363 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:13,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 399 transitions. [2023-12-02 20:04:13,351 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 399 transitions. Word has length 92 [2023-12-02 20:04:13,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:13,351 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 399 transitions. [2023-12-02 20:04:13,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 3.010989010989011) internal successors, (274), 92 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:13,351 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 399 transitions. [2023-12-02 20:04:13,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 20:04:13,352 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:13,352 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 5, 5, 5, 5, 5, 1, 1, 1] [2023-12-02 20:04:13,356 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 20:04:13,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:13,553 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:04:13,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1450138782, now seen corresponding path program 9 times [2023-12-02 20:04:13,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:13,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284227045] [2023-12-02 20:04:13,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:13,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:14,022 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284227045] [2023-12-02 20:04:14,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284227045] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:14,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273974451] [2023-12-02 20:04:14,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:04:14,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:14,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:14,023 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:14,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 20:04:14,077 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:04:14,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:04:14,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 34 conjunts are in the unsatisfiable core [2023-12-02 20:04:14,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:15,105 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:15,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:16,119 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:16,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273974451] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:16,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1187378127] [2023-12-02 20:04:16,121 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:04:16,121 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:16,121 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:16,121 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:16,121 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:16,394 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:17,155 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '706020#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:04:17,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:17,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:04:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 94 [2023-12-02 20:04:17,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763919554] [2023-12-02 20:04:17,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-12-02 20:04:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:17,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-12-02 20:04:17,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1318, Invalid=9602, Unknown=0, NotChecked=0, Total=10920 [2023-12-02 20:04:17,158 INFO L87 Difference]: Start difference. First operand 364 states and 399 transitions. Second operand has 95 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 95 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:47,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:47,671 INFO L93 Difference]: Finished difference Result 1390 states and 1453 transitions. [2023-12-02 20:04:47,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 352 states. [2023-12-02 20:04:47,672 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 95 states have internal predecessors, (277), 0 states have call successors, (0), 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 93 [2023-12-02 20:04:47,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:47,674 INFO L225 Difference]: With dead ends: 1390 [2023-12-02 20:04:47,674 INFO L226 Difference]: Without dead ends: 1389 [2023-12-02 20:04:47,692 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 640 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77477 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=38105, Invalid=150685, Unknown=0, NotChecked=0, Total=188790 [2023-12-02 20:04:47,692 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3097 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8201 mSolverCounterSat, 768 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3097 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 8969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 768 IncrementalHoareTripleChecker+Valid, 8201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:47,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3097 Valid, 25 Invalid, 8969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [768 Valid, 8201 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-12-02 20:04:47,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1389 states. [2023-12-02 20:04:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1389 to 400. [2023-12-02 20:04:48,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 398 states have (on average 1.092964824120603) internal successors, (435), 399 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:48,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 435 transitions. [2023-12-02 20:04:48,697 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 435 transitions. Word has length 93 [2023-12-02 20:04:48,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:48,698 INFO L495 AbstractCegarLoop]: Abstraction has 400 states and 435 transitions. [2023-12-02 20:04:48,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 2.9468085106382977) internal successors, (277), 95 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:48,698 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 435 transitions. [2023-12-02 20:04:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-12-02 20:04:48,699 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:48,699 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 1, 1, 1] [2023-12-02 20:04:48,703 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-12-02 20:04:48,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-02 20:04:48,900 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:04:48,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:48,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1379039956, now seen corresponding path program 10 times [2023-12-02 20:04:48,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:48,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268342407] [2023-12-02 20:04:48,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:48,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:49,364 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268342407] [2023-12-02 20:04:49,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268342407] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:49,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808764912] [2023-12-02 20:04:49,364 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 20:04:49,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:49,365 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:49,370 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 20:04:49,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:49,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 20:04:49,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:50,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:04:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:50,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808764912] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:04:50,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [777702979] [2023-12-02 20:04:50,673 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:04:50,673 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:04:50,674 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:04:50,674 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:04:50,674 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:04:50,933 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:04:51,358 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '709651#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:04:51,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:04:51,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:04:51,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 23, 23] total 78 [2023-12-02 20:04:51,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112008983] [2023-12-02 20:04:51,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:04:51,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-12-02 20:04:51,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:51,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-12-02 20:04:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=6533, Unknown=0, NotChecked=0, Total=7832 [2023-12-02 20:04:51,361 INFO L87 Difference]: Start difference. First operand 400 states and 435 transitions. Second operand has 79 states, 78 states have (on average 3.551282051282051) internal successors, (277), 79 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:05:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:05:03,599 INFO L93 Difference]: Finished difference Result 1041 states and 1084 transitions. [2023-12-02 20:05:03,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2023-12-02 20:05:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 3.551282051282051) internal successors, (277), 79 states have internal predecessors, (277), 0 states have call successors, (0), 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 93 [2023-12-02 20:05:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:05:03,601 INFO L225 Difference]: With dead ends: 1041 [2023-12-02 20:05:03,601 INFO L226 Difference]: Without dead ends: 1040 [2023-12-02 20:05:03,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30310 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=17687, Invalid=56025, Unknown=0, NotChecked=0, Total=73712 [2023-12-02 20:05:03,605 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1962 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1962 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-02 20:05:03,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1962 Valid, 75 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-02 20:05:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2023-12-02 20:05:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 370. [2023-12-02 20:05:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 368 states have (on average 1.1032608695652173) internal successors, (406), 369 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:05:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 406 transitions. [2023-12-02 20:05:04,399 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 406 transitions. Word has length 93 [2023-12-02 20:05:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:05:04,399 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 406 transitions. [2023-12-02 20:05:04,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 3.551282051282051) internal successors, (277), 79 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:05:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 406 transitions. [2023-12-02 20:05:04,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-12-02 20:05:04,400 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:05:04,400 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 7, 7, 7, 7, 7, 6, 1, 1, 1] [2023-12-02 20:05:04,406 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 20:05:04,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:04,601 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:05:04,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:05:04,601 INFO L85 PathProgramCache]: Analyzing trace with hash -31268490, now seen corresponding path program 11 times [2023-12-02 20:05:04,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:05:04,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027077508] [2023-12-02 20:05:04,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:04,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:05:04,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:05,303 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:05:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027077508] [2023-12-02 20:05:05,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027077508] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:05,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728283044] [2023-12-02 20:05:05,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:05:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:05,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:05:05,304 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:05:05,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 20:05:05,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2023-12-02 20:05:05,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:05:05,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-02 20:05:05,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:05:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:06,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:05:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 607 backedges. 0 proven. 607 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:06,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728283044] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:05:06,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1780667542] [2023-12-02 20:05:06,937 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:05:06,937 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:05:06,937 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:05:06,937 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:05:06,938 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:05:07,218 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:05:07,674 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '712586#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:05:07,674 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:05:07,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:05:07,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 27, 27] total 92 [2023-12-02 20:05:07,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817514544] [2023-12-02 20:05:07,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:05:07,675 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-12-02 20:05:07,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:05:07,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-12-02 20:05:07,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1759, Invalid=8747, Unknown=0, NotChecked=0, Total=10506 [2023-12-02 20:05:07,677 INFO L87 Difference]: Start difference. First operand 370 states and 406 transitions. Second operand has 93 states, 92 states have (on average 3.532608695652174) internal successors, (325), 93 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:05:26,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:05:26,111 INFO L93 Difference]: Finished difference Result 1272 states and 1319 transitions. [2023-12-02 20:05:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2023-12-02 20:05:26,111 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 3.532608695652174) internal successors, (325), 93 states have internal predecessors, (325), 0 states have call successors, (0), 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 109 [2023-12-02 20:05:26,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:05:26,113 INFO L225 Difference]: With dead ends: 1272 [2023-12-02 20:05:26,113 INFO L226 Difference]: Without dead ends: 1271 [2023-12-02 20:05:26,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51103 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=29085, Invalid=91671, Unknown=0, NotChecked=0, Total=120756 [2023-12-02 20:05:26,119 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 3363 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1230 mSolverCounterSat, 995 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 2225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 995 IncrementalHoareTripleChecker+Valid, 1230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:05:26,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 87 Invalid, 2225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [995 Valid, 1230 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 20:05:26,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1271 states. [2023-12-02 20:05:26,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1271 to 376. [2023-12-02 20:05:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 374 states have (on average 1.1042780748663101) internal successors, (413), 375 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:05:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 413 transitions. [2023-12-02 20:05:26,977 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 413 transitions. Word has length 109 [2023-12-02 20:05:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:05:26,977 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 413 transitions. [2023-12-02 20:05:26,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 3.532608695652174) internal successors, (325), 93 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:05:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 413 transitions. [2023-12-02 20:05:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-12-02 20:05:26,978 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:05:26,978 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 8, 8, 8, 8, 8, 7, 1, 1, 1] [2023-12-02 20:05:26,982 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-02 20:05:27,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:27,179 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:05:27,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:05:27,179 INFO L85 PathProgramCache]: Analyzing trace with hash -668099008, now seen corresponding path program 12 times [2023-12-02 20:05:27,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:05:27,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167074914] [2023-12-02 20:05:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:05:27,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:05:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:05:27,966 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:27,966 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:05:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167074914] [2023-12-02 20:05:27,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167074914] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:05:27,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687022747] [2023-12-02 20:05:27,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:05:27,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:05:27,967 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:05:27,967 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:05:27,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 20:05:28,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:05:28,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:05:28,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-02 20:05:28,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:05:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:29,293 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:05:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 0 proven. 813 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:31,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687022747] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:05:31,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [929629610] [2023-12-02 20:05:31,204 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:05:31,204 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:05:31,204 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:05:31,205 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:05:31,205 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:05:31,476 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:05:32,084 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '716098#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:05:32,084 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:05:32,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:05:32,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46, 46] total 136 [2023-12-02 20:05:32,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192985593] [2023-12-02 20:05:32,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:05:32,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-12-02 20:05:32,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:05:32,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-12-02 20:05:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3709, Invalid=17753, Unknown=0, NotChecked=0, Total=21462 [2023-12-02 20:05:32,088 INFO L87 Difference]: Start difference. First operand 376 states and 413 transitions. Second operand has 137 states, 136 states have (on average 2.7426470588235294) internal successors, (373), 137 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:06:58,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:06:58,681 INFO L93 Difference]: Finished difference Result 2773 states and 2843 transitions. [2023-12-02 20:06:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 779 states. [2023-12-02 20:06:58,682 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 2.7426470588235294) internal successors, (373), 137 states have internal predecessors, (373), 0 states have call successors, (0), 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 125 [2023-12-02 20:06:58,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:06:58,683 INFO L225 Difference]: With dead ends: 2773 [2023-12-02 20:06:58,683 INFO L226 Difference]: Without dead ends: 2772 [2023-12-02 20:06:58,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1175 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 900 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386288 ImplicationChecksByTransitivity, 56.9s TimeCoverageRelationStatistics Valid=157247, Invalid=655455, Unknown=0, NotChecked=0, Total=812702 [2023-12-02 20:06:58,717 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 11076 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 19851 mSolverCounterSat, 2702 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11076 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 22553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2702 IncrementalHoareTripleChecker+Valid, 19851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:06:58,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11076 Valid, 3 Invalid, 22553 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2702 Valid, 19851 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-12-02 20:06:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2772 states. [2023-12-02 20:06:59,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2772 to 408. [2023-12-02 20:06:59,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 406 states have (on average 1.1059113300492611) internal successors, (449), 407 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:06:59,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 449 transitions. [2023-12-02 20:06:59,706 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 449 transitions. Word has length 125 [2023-12-02 20:06:59,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:06:59,707 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 449 transitions. [2023-12-02 20:06:59,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 136 states have (on average 2.7426470588235294) internal successors, (373), 137 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:06:59,707 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 449 transitions. [2023-12-02 20:06:59,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-12-02 20:06:59,707 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:06:59,707 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 7, 7, 7, 7, 7, 1, 1, 1] [2023-12-02 20:06:59,711 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 20:06:59,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-02 20:06:59,908 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:06:59,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:06:59,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2068259834, now seen corresponding path program 13 times [2023-12-02 20:06:59,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:06:59,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782726281] [2023-12-02 20:06:59,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:06:59,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:06:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:07:00,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 1040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:07:00,787 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:07:00,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782726281] [2023-12-02 20:07:00,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782726281] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:07:00,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393687418] [2023-12-02 20:07:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 20:07:00,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:07:00,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:07:00,788 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:07:00,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 20:07:00,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:07:00,843 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-02 20:07:00,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:07:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 1040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:07:02,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:07:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 0 proven. 1040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:07:04,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393687418] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:07:04,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402209343] [2023-12-02 20:07:04,465 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:07:04,466 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:07:04,466 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:07:04,466 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:07:04,466 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:07:04,719 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:07:05,549 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '722736#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:07:05,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:07:05,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:07:05,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 41, 41] total 128 [2023-12-02 20:07:05,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092973314] [2023-12-02 20:07:05,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:07:05,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-12-02 20:07:05,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:07:05,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-12-02 20:07:05,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=16254, Unknown=0, NotChecked=0, Total=19182 [2023-12-02 20:07:05,554 INFO L87 Difference]: Start difference. First operand 408 states and 449 transitions. Second operand has 129 states, 128 states have (on average 3.2421875) internal successors, (415), 129 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:07:53,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:07:53,290 INFO L93 Difference]: Finished difference Result 1903 states and 1975 transitions. [2023-12-02 20:07:53,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 444 states. [2023-12-02 20:07:53,290 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 3.2421875) internal successors, (415), 129 states have internal predecessors, (415), 0 states have call successors, (0), 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 139 [2023-12-02 20:07:53,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:07:53,292 INFO L225 Difference]: With dead ends: 1903 [2023-12-02 20:07:53,292 INFO L226 Difference]: Without dead ends: 1902 [2023-12-02 20:07:53,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 875 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 548 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138293 ImplicationChecksByTransitivity, 36.7s TimeCoverageRelationStatistics Valid=80437, Invalid=221513, Unknown=0, NotChecked=0, Total=301950 [2023-12-02 20:07:53,303 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 4097 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3192 mSolverCounterSat, 1152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4097 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 4344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1152 IncrementalHoareTripleChecker+Valid, 3192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:07:53,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4097 Valid, 155 Invalid, 4344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1152 Valid, 3192 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-12-02 20:07:53,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1902 states. [2023-12-02 20:07:55,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1902 to 432. [2023-12-02 20:07:55,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 430 states have (on average 1.1) internal successors, (473), 431 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:07:55,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 473 transitions. [2023-12-02 20:07:55,164 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 473 transitions. Word has length 139 [2023-12-02 20:07:55,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:07:55,164 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 473 transitions. [2023-12-02 20:07:55,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 3.2421875) internal successors, (415), 129 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:07:55,164 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 473 transitions. [2023-12-02 20:07:55,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-02 20:07:55,165 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:07:55,165 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 9, 9, 9, 9, 9, 8, 1, 1, 1] [2023-12-02 20:07:55,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-02 20:07:55,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-02 20:07:55,366 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:07:55,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:07:55,366 INFO L85 PathProgramCache]: Analyzing trace with hash -956081270, now seen corresponding path program 14 times [2023-12-02 20:07:55,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:07:55,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706408721] [2023-12-02 20:07:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:07:55,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:07:55,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:07:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 0 proven. 1049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:07:56,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:07:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706408721] [2023-12-02 20:07:56,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706408721] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:07:56,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052256891] [2023-12-02 20:07:56,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 20:07:56,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:07:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:07:56,188 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:07:56,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-02 20:07:56,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-12-02 20:07:56,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:07:56,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-02 20:07:56,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:07:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 0 proven. 1049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:07:57,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:07:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 1049 backedges. 0 proven. 1049 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:07:58,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052256891] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:07:58,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [328857771] [2023-12-02 20:07:58,979 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:07:58,979 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:07:58,980 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:07:58,980 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:07:58,980 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:07:59,235 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:07:59,819 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '727591#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:07:59,819 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:07:59,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:07:59,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 39, 39] total 128 [2023-12-02 20:07:59,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904476412] [2023-12-02 20:07:59,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:07:59,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2023-12-02 20:07:59,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:07:59,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2023-12-02 20:07:59,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3050, Invalid=16132, Unknown=0, NotChecked=0, Total=19182 [2023-12-02 20:07:59,823 INFO L87 Difference]: Start difference. First operand 432 states and 473 transitions. Second operand has 129 states, 128 states have (on average 3.2890625) internal successors, (421), 129 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:09:08,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:09:08,407 INFO L93 Difference]: Finished difference Result 2543 states and 2610 transitions. [2023-12-02 20:09:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 564 states. [2023-12-02 20:09:08,408 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 128 states have (on average 3.2890625) internal successors, (421), 129 states have internal predecessors, (421), 0 states have call successors, (0), 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 141 [2023-12-02 20:09:08,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:09:08,409 INFO L225 Difference]: With dead ends: 2543 [2023-12-02 20:09:08,409 INFO L226 Difference]: Without dead ends: 2542 [2023-12-02 20:09:08,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 681 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213807 ImplicationChecksByTransitivity, 45.2s TimeCoverageRelationStatistics Valid=101320, Invalid=364486, Unknown=0, NotChecked=0, Total=465806 [2023-12-02 20:09:08,428 INFO L413 NwaCegarLoop]: 1 mSDtfsCounter, 6922 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 3386 mSolverCounterSat, 2119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6922 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 5505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2119 IncrementalHoareTripleChecker+Valid, 3386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-12-02 20:09:08,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6922 Valid, 61 Invalid, 5505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2119 Valid, 3386 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-12-02 20:09:08,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2023-12-02 20:09:10,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 455. [2023-12-02 20:09:10,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 453 states have (on average 1.1147902869757174) internal successors, (505), 454 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:09:10,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 505 transitions. [2023-12-02 20:09:10,262 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 505 transitions. Word has length 141 [2023-12-02 20:09:10,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:09:10,263 INFO L495 AbstractCegarLoop]: Abstraction has 455 states and 505 transitions. [2023-12-02 20:09:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 128 states have (on average 3.2890625) internal successors, (421), 129 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:09:10,263 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 505 transitions. [2023-12-02 20:09:10,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-12-02 20:09:10,264 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:09:10,264 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 10, 10, 10, 10, 10, 9, 1, 1, 1] [2023-12-02 20:09:10,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-12-02 20:09:10,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:09:10,464 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 5 more)] === [2023-12-02 20:09:10,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:09:10,465 INFO L85 PathProgramCache]: Analyzing trace with hash -687752876, now seen corresponding path program 15 times [2023-12-02 20:09:10,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:09:10,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688991097] [2023-12-02 20:09:10,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:09:10,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:09:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:09:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 0 proven. 1315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:09:11,555 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:09:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688991097] [2023-12-02 20:09:11,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688991097] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:09:11,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319935590] [2023-12-02 20:09:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 20:09:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:09:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:09:11,556 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:09:11,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d583079d-aaae-448a-b98f-8221293fd713/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-02 20:09:11,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 20:09:11,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 20:09:11,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 60 conjunts are in the unsatisfiable core [2023-12-02 20:09:11,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:09:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 0 proven. 1315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:09:13,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:09:16,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 0 proven. 1315 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:09:16,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319935590] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:09:16,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2028433028] [2023-12-02 20:09:16,142 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2023-12-02 20:09:16,142 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:09:16,142 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:09:16,142 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:09:16,142 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:09:16,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 20:09:17,124 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '733714#(and (<= 1 |ULTIMATE.start_main_~y~0#1|) (<= 2147483648 (+ |ULTIMATE.start_main_~x~0#1| |ULTIMATE.start_main_~y~0#1|)))' at error location [2023-12-02 20:09:17,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 20:09:17,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 20:09:17,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58, 58] total 172 [2023-12-02 20:09:17,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727206051] [2023-12-02 20:09:17,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 20:09:17,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2023-12-02 20:09:17,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:09:17,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2023-12-02 20:09:17,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5863, Invalid=27443, Unknown=0, NotChecked=0, Total=33306 [2023-12-02 20:09:17,130 INFO L87 Difference]: Start difference. First operand 455 states and 505 transitions. Second operand has 173 states, 172 states have (on average 2.7267441860465116) internal successors, (469), 173 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)