./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/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_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/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 32bit --witnessprinter.graph.data.programhash 366d45071e2a444aa552f231e24508af3eb704e415c6b738128a0398e54b53a7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 19:36:32,579 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 19:36:32,652 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-12-02 19:36:32,656 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 19:36:32,658 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 19:36:32,689 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 19:36:32,690 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 19:36:32,691 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 19:36:32,691 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 19:36:32,692 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 19:36:32,693 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 19:36:32,693 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 19:36:32,694 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 19:36:32,694 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 19:36:32,694 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 19:36:32,695 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 19:36:32,695 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 19:36:32,696 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 19:36:32,696 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 19:36:32,697 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 19:36:32,697 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 19:36:32,698 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 19:36:32,698 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 19:36:32,699 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 19:36:32,699 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 19:36:32,699 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 19:36:32,700 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 19:36:32,700 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 19:36:32,700 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 19:36:32,701 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 19:36:32,701 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 19:36:32,701 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 19:36:32,702 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 19:36:32,702 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 19:36:32,702 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 19:36:32,702 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 19:36:32,702 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 19:36:32,702 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 19:36:32,703 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 19:36:32,703 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:36:32,703 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 19:36:32,703 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 19:36:32,704 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 19:36:32,704 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 19:36:32,704 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 19:36:32,704 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 19:36:32,704 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 19:36:32,704 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 19:36:32,705 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 19:36:32,705 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_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 366d45071e2a444aa552f231e24508af3eb704e415c6b738128a0398e54b53a7 [2023-12-02 19:36:32,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 19:36:32,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 19:36:32,967 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 19:36:32,968 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 19:36:32,969 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 19:36:32,970 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i [2023-12-02 19:36:35,730 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 19:36:35,889 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 19:36:35,890 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/sv-benchmarks/c/loop-zilu/benchmark38_conjunctive.i [2023-12-02 19:36:35,897 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/data/aa7c36bb3/8676fc4c060e4fd08fea57d27656be56/FLAG708dd5ea2 [2023-12-02 19:36:35,911 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/data/aa7c36bb3/8676fc4c060e4fd08fea57d27656be56 [2023-12-02 19:36:35,913 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 19:36:35,915 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 19:36:35,916 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 19:36:35,916 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 19:36:35,921 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 19:36:35,922 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:36:35" (1/1) ... [2023-12-02 19:36:35,923 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b3a9bb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:35, skipping insertion in model container [2023-12-02 19:36:35,923 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 07:36:35" (1/1) ... [2023-12-02 19:36:35,943 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 19:36:36,087 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:36:36,096 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 19:36:36,108 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 19:36:36,121 INFO L206 MainTranslator]: Completed translation [2023-12-02 19:36:36,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36 WrapperNode [2023-12-02 19:36:36,121 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 19:36:36,122 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 19:36:36,123 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 19:36:36,123 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 19:36:36,131 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,137 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,152 INFO L138 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2023-12-02 19:36:36,153 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 19:36:36,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 19:36:36,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 19:36:36,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 19:36:36,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,162 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,164 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,172 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 19:36:36,174 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 19:36:36,174 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 19:36:36,175 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 19:36:36,175 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (1/1) ... [2023-12-02 19:36:36,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 19:36:36,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:36,210 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 19:36:36,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 19:36:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 19:36:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 19:36:36,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 19:36:36,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 19:36:36,311 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 19:36:36,313 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 19:36:36,434 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 19:36:36,472 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 19:36:36,472 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 19:36:36,474 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:36:36 BoogieIcfgContainer [2023-12-02 19:36:36,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 19:36:36,477 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 19:36:36,477 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 19:36:36,499 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 19:36:36,499 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 07:36:35" (1/3) ... [2023-12-02 19:36:36,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c2ed17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:36:36, skipping insertion in model container [2023-12-02 19:36:36,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 07:36:36" (2/3) ... [2023-12-02 19:36:36,500 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68c2ed17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 07:36:36, skipping insertion in model container [2023-12-02 19:36:36,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 07:36:36" (3/3) ... [2023-12-02 19:36:36,502 INFO L112 eAbstractionObserver]: Analyzing ICFG benchmark38_conjunctive.i [2023-12-02 19:36:36,523 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 19:36:36,524 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2023-12-02 19:36:36,583 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 19:36:36,590 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;@4d6ece12, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 19:36:36,590 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2023-12-02 19:36:36,594 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:36,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-12-02 19:36:36,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:36,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-12-02 19:36:36,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:36,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:36,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2420664, now seen corresponding path program 1 times [2023-12-02 19:36:36,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:36,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475562023] [2023-12-02 19:36:36,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:36,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:36,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:36,744 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 19:36:36,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:36,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475562023] [2023-12-02 19:36:36,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475562023] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:36,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:36,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:36:36,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524122080] [2023-12-02 19:36:36,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:36,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 19:36:36,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 19:36:36,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:36:36,783 INFO L87 Difference]: Start difference. First operand has 18 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 19:36:36,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:36,804 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2023-12-02 19:36:36,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 19:36:36,807 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 19:36:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:36,814 INFO L225 Difference]: With dead ends: 24 [2023-12-02 19:36:36,814 INFO L226 Difference]: Without dead ends: 16 [2023-12-02 19:36:36,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 19:36:36,821 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:36,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:36,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-02 19:36:36,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-02 19:36:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:36,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-12-02 19:36:36,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 4 [2023-12-02 19:36:36,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:36,853 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-12-02 19:36:36,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 19:36:36,853 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-12-02 19:36:36,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:36:36,854 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:36,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:36:36,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 19:36:36,855 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:36,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:36,855 INFO L85 PathProgramCache]: Analyzing trace with hash 75025815, now seen corresponding path program 1 times [2023-12-02 19:36:36,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:36,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469139555] [2023-12-02 19:36:36,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:36,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:36,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:36,913 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 19:36:36,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:36,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469139555] [2023-12-02 19:36:36,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469139555] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:36,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:36,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-12-02 19:36:36,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682894955] [2023-12-02 19:36:36,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:36,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:36:36,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:36,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:36:36,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:36:36,918 INFO L87 Difference]: Start difference. First operand 16 states and 16 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 19:36:36,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:36,930 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-12-02 19:36:36,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:36:36,931 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 19:36:36,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:36,932 INFO L225 Difference]: With dead ends: 16 [2023-12-02 19:36:36,932 INFO L226 Difference]: Without dead ends: 15 [2023-12-02 19:36:36,932 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 19:36:36,934 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 10 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:36,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 10 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-02 19:36:36,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-02 19:36:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.5) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:36,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-12-02 19:36:36,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2023-12-02 19:36:36,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:36,939 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-12-02 19:36:36,939 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 19:36:36,940 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-12-02 19:36:36,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-12-02 19:36:36,940 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:36,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-12-02 19:36:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 19:36:36,941 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:36,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 75025764, now seen corresponding path program 1 times [2023-12-02 19:36:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852380788] [2023-12-02 19:36:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:36,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:36,982 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 19:36:36,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:36,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852380788] [2023-12-02 19:36:36,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852380788] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:36,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:36,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:36:36,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132899212] [2023-12-02 19:36:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:36,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:36:36,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:36,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:36:36,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:36:36,985 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 19:36:37,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:37,003 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-02 19:36:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:36:37,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 19:36:37,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:37,005 INFO L225 Difference]: With dead ends: 27 [2023-12-02 19:36:37,005 INFO L226 Difference]: Without dead ends: 26 [2023-12-02 19:36:37,005 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 19:36:37,007 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:37,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:37,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-12-02 19:36:37,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2023-12-02 19:36:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-12-02 19:36:37,013 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 5 [2023-12-02 19:36:37,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:37,014 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-12-02 19:36:37,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 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 19:36:37,014 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-12-02 19:36:37,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 19:36:37,015 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:37,015 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 19:36:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 19:36:37,015 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:37,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:37,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1969166980, now seen corresponding path program 1 times [2023-12-02 19:36:37,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:37,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727288242] [2023-12-02 19:36:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:37,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:37,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:37,056 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 19:36:37,056 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:37,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727288242] [2023-12-02 19:36:37,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727288242] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:37,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:37,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:36:37,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85940390] [2023-12-02 19:36:37,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:37,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:36:37,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:36:37,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:36:37,059 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:37,073 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2023-12-02 19:36:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:36:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 19:36:37,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:37,075 INFO L225 Difference]: With dead ends: 23 [2023-12-02 19:36:37,075 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 19:36:37,075 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 19:36:37,077 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 22 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 19:36:37,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-12-02 19:36:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.4) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-12-02 19:36:37,083 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 6 [2023-12-02 19:36:37,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:37,083 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-12-02 19:36:37,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,083 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-12-02 19:36:37,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 19:36:37,084 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:37,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 19:36:37,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 19:36:37,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:37,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:37,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1969168550, now seen corresponding path program 1 times [2023-12-02 19:36:37,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:37,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609874912] [2023-12-02 19:36:37,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:37,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:37,116 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 19:36:37,117 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:37,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609874912] [2023-12-02 19:36:37,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609874912] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:37,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:37,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 19:36:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117672533] [2023-12-02 19:36:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:37,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 19:36:37,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 19:36:37,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 19:36:37,120 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:37,137 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2023-12-02 19:36:37,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 19:36:37,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 19:36:37,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:37,139 INFO L225 Difference]: With dead ends: 26 [2023-12-02 19:36:37,139 INFO L226 Difference]: Without dead ends: 23 [2023-12-02 19:36:37,139 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 19:36:37,141 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:37,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:37,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-02 19:36:37,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2023-12-02 19:36:37,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-12-02 19:36:37,146 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 6 [2023-12-02 19:36:37,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:37,147 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-12-02 19:36:37,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,147 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-12-02 19:36:37,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 19:36:37,148 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:37,148 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:37,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 19:36:37,149 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:37,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:37,149 INFO L85 PathProgramCache]: Analyzing trace with hash -914634183, now seen corresponding path program 1 times [2023-12-02 19:36:37,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:37,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798951501] [2023-12-02 19:36:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:37,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:37,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:37,197 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 19:36:37,197 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:37,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798951501] [2023-12-02 19:36:37,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798951501] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:37,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:37,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:36:37,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640337755] [2023-12-02 19:36:37,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:37,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:36:37,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:37,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:36:37,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:36:37,200 INFO L87 Difference]: Start difference. First operand 19 states and 19 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 19:36:37,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:37,232 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2023-12-02 19:36:37,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:36:37,232 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 19:36:37,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:37,233 INFO L225 Difference]: With dead ends: 19 [2023-12-02 19:36:37,233 INFO L226 Difference]: Without dead ends: 17 [2023-12-02 19:36:37,234 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 19:36:37,235 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 9 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:37,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 12 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:37,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-12-02 19:36:37,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-12-02 19:36:37,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-12-02 19:36:37,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 7 [2023-12-02 19:36:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:37,240 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-12-02 19:36:37,240 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 19:36:37,241 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-12-02 19:36:37,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 19:36:37,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:37,241 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:37,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 19:36:37,242 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:37,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:37,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1711111454, now seen corresponding path program 1 times [2023-12-02 19:36:37,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:37,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873114149] [2023-12-02 19:36:37,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:37,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:37,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:37,283 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 19:36:37,283 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:37,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873114149] [2023-12-02 19:36:37,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873114149] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 19:36:37,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 19:36:37,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 19:36:37,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816636630] [2023-12-02 19:36:37,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 19:36:37,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 19:36:37,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:37,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 19:36:37,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 19:36:37,285 INFO L87 Difference]: Start difference. First operand 17 states and 17 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 19:36:37,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:37,309 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2023-12-02 19:36:37,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 19:36:37,309 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 19:36:37,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:37,310 INFO L225 Difference]: With dead ends: 20 [2023-12-02 19:36:37,310 INFO L226 Difference]: Without dead ends: 19 [2023-12-02 19:36:37,310 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 19:36:37,311 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:37,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:37,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-12-02 19:36:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-12-02 19:36:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2023-12-02 19:36:37,316 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 8 [2023-12-02 19:36:37,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:37,316 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2023-12-02 19:36:37,316 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 19:36:37,316 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2023-12-02 19:36:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:36:37,317 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:37,317 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:37,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 19:36:37,317 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:37,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:37,318 INFO L85 PathProgramCache]: Analyzing trace with hash 45190213, now seen corresponding path program 1 times [2023-12-02 19:36:37,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:37,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124929410] [2023-12-02 19:36:37,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:37,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:37,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:37,370 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124929410] [2023-12-02 19:36:37,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124929410] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:37,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401329505] [2023-12-02 19:36:37,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:37,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:37,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:37,372 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:37,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 19:36:37,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:37,421 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:36:37,426 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:37,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:37,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:37,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:37,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401329505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:37,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1140272800] [2023-12-02 19:36:37,520 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:37,520 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:37,523 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:37,528 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:37,528 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:37,962 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:38,145 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '422#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:38,145 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:38,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:38,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2023-12-02 19:36:38,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531327038] [2023-12-02 19:36:38,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:38,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 19:36:38,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:38,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 19:36:38,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:36:38,148 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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 19:36:38,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:38,180 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-12-02 19:36:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 19:36:38,180 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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) Word has length 12 [2023-12-02 19:36:38,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:38,181 INFO L225 Difference]: With dead ends: 47 [2023-12-02 19:36:38,181 INFO L226 Difference]: Without dead ends: 46 [2023-12-02 19:36:38,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-12-02 19:36:38,190 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:38,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:38,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-02 19:36:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 35. [2023-12-02 19:36:38,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.25) internal successors, (40), 34 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:38,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-12-02 19:36:38,199 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 12 [2023-12-02 19:36:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:38,199 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-12-02 19:36:38,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.6) internal successors, (23), 6 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 19:36:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-12-02 19:36:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 19:36:38,200 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:38,200 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 19:36:38,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 19:36:38,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:38,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:38,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:38,407 INFO L85 PathProgramCache]: Analyzing trace with hash 45188643, now seen corresponding path program 1 times [2023-12-02 19:36:38,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410382901] [2023-12-02 19:36:38,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:38,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:38,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:38,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:38,458 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:38,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410382901] [2023-12-02 19:36:38,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410382901] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:38,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748286843] [2023-12-02 19:36:38,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:38,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:38,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:38,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:38,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 19:36:38,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:38,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 19:36:38,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:38,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:38,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:38,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748286843] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:38,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [570456210] [2023-12-02 19:36:38,560 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:36:38,560 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:38,560 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:38,560 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:38,560 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:38,821 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:39,074 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '593#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_24| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_24| 256) 0)) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:39,074 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:39,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:39,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-12-02 19:36:39,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033301928] [2023-12-02 19:36:39,075 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:39,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 19:36:39,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 19:36:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2023-12-02 19:36:39,076 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 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 19:36:39,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:39,128 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2023-12-02 19:36:39,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 19:36:39,129 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 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) Word has length 12 [2023-12-02 19:36:39,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:39,130 INFO L225 Difference]: With dead ends: 42 [2023-12-02 19:36:39,130 INFO L226 Difference]: Without dead ends: 36 [2023-12-02 19:36:39,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-12-02 19:36:39,131 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 13 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:39,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 39 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:39,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-02 19:36:39,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2023-12-02 19:36:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 32 states have (on average 1.15625) internal successors, (37), 34 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 19:36:39,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-12-02 19:36:39,136 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 12 [2023-12-02 19:36:39,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:39,137 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-12-02 19:36:39,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 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 19:36:39,137 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-12-02 19:36:39,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 19:36:39,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:39,138 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1] [2023-12-02 19:36:39,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 19:36:39,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:39,339 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:39,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:39,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1313170288, now seen corresponding path program 1 times [2023-12-02 19:36:39,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:39,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377550818] [2023-12-02 19:36:39,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:39,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:39,423 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:39,423 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:39,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377550818] [2023-12-02 19:36:39,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377550818] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:39,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389575348] [2023-12-02 19:36:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:39,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:39,425 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:39,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 19:36:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:39,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:36:39,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:39,494 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:39,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:39,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:39,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389575348] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:39,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [640919806] [2023-12-02 19:36:39,574 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:39,574 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:39,574 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:39,574 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:39,574 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:39,710 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:39,933 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '817#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post4#1|) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:39,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:39,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:39,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-12-02 19:36:39,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838164062] [2023-12-02 19:36:39,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:39,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 19:36:39,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:39,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 19:36:39,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2023-12-02 19:36:39,935 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:36:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:40,069 INFO L93 Difference]: Finished difference Result 61 states and 64 transitions. [2023-12-02 19:36:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-02 19:36:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-12-02 19:36:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:40,071 INFO L225 Difference]: With dead ends: 61 [2023-12-02 19:36:40,071 INFO L226 Difference]: Without dead ends: 60 [2023-12-02 19:36:40,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2023-12-02 19:36:40,072 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 34 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:40,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 45 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:36:40,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-12-02 19:36:40,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 49. [2023-12-02 19:36:40,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.173913043478261) internal successors, (54), 48 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:40,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2023-12-02 19:36:40,078 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 20 [2023-12-02 19:36:40,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:40,079 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2023-12-02 19:36:40,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.0) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 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 19:36:40,079 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2023-12-02 19:36:40,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-02 19:36:40,080 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:40,080 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2023-12-02 19:36:40,084 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 19:36:40,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:40,282 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:40,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:40,282 INFO L85 PathProgramCache]: Analyzing trace with hash 488239989, now seen corresponding path program 2 times [2023-12-02 19:36:40,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:40,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9093799] [2023-12-02 19:36:40,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:40,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:40,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:40,377 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:40,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:40,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9093799] [2023-12-02 19:36:40,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9093799] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:40,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70815985] [2023-12-02 19:36:40,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:36:40,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:40,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:40,379 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:40,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 19:36:40,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-02 19:36:40,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:40,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 19:36:40,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:40,470 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:40,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:40,559 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:40,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70815985] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:40,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [141922147] [2023-12-02 19:36:40,562 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:36:40,562 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:40,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:40,562 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:40,562 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:40,741 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:41,014 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1112#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_40| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_40| 256) 0)) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:41,014 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:41,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:41,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-12-02 19:36:41,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536974489] [2023-12-02 19:36:41,014 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:41,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-02 19:36:41,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:41,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-02 19:36:41,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2023-12-02 19:36:41,016 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:41,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:41,136 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2023-12-02 19:36:41,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-02 19:36:41,137 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-12-02 19:36:41,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:41,138 INFO L225 Difference]: With dead ends: 68 [2023-12-02 19:36:41,138 INFO L226 Difference]: Without dead ends: 59 [2023-12-02 19:36:41,139 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2023-12-02 19:36:41,140 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 45 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:41,140 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 59 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:41,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-02 19:36:41,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 51. [2023-12-02 19:36:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.1041666666666667) internal successors, (53), 50 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2023-12-02 19:36:41,146 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 24 [2023-12-02 19:36:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:41,146 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2023-12-02 19:36:41,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2023-12-02 19:36:41,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-02 19:36:41,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:41,147 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1] [2023-12-02 19:36:41,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 19:36:41,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-02 19:36:41,352 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:41,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:41,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1487675360, now seen corresponding path program 2 times [2023-12-02 19:36:41,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:41,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518159484] [2023-12-02 19:36:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:41,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:41,432 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:41,432 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:41,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518159484] [2023-12-02 19:36:41,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518159484] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:41,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267198504] [2023-12-02 19:36:41,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:36:41,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:41,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:41,434 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:41,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-02 19:36:41,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-02 19:36:41,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:41,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 19:36:41,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:41,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:41,595 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:41,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267198504] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:41,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611908762] [2023-12-02 19:36:41,597 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:41,597 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:41,597 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:41,597 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:41,598 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:41,724 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:41,894 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1450#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:41,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:41,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:41,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-12-02 19:36:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585408124] [2023-12-02 19:36:41,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:41,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-02 19:36:41,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:41,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-02 19:36:41,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:36:41,896 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:41,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:41,930 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2023-12-02 19:36:41,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-02 19:36:41,930 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2023-12-02 19:36:41,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:41,931 INFO L225 Difference]: With dead ends: 84 [2023-12-02 19:36:41,931 INFO L226 Difference]: Without dead ends: 83 [2023-12-02 19:36:41,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-12-02 19:36:41,932 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:41,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 78 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:41,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-12-02 19:36:41,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2023-12-02 19:36:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 70 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:41,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2023-12-02 19:36:41,939 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 30 [2023-12-02 19:36:41,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:41,939 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2023-12-02 19:36:41,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.363636363636363) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:41,940 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2023-12-02 19:36:41,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 19:36:41,941 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:41,941 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1] [2023-12-02 19:36:41,946 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-02 19:36:42,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-02 19:36:42,146 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:42,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 566947604, now seen corresponding path program 2 times [2023-12-02 19:36:42,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:42,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32453313] [2023-12-02 19:36:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:42,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:42,368 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:42,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32453313] [2023-12-02 19:36:42,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32453313] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:42,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40331032] [2023-12-02 19:36:42,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:36:42,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:42,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:42,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:42,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-02 19:36:42,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-12-02 19:36:42,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:42,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-02 19:36:42,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:42,489 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:42,742 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:42,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40331032] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:42,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1742161188] [2023-12-02 19:36:42,744 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:42,744 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:42,744 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:42,744 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:42,744 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:42,894 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:43,185 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1920#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post4#1|) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:43,185 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:43,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:43,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2023-12-02 19:36:43,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29427373] [2023-12-02 19:36:43,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:43,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-02 19:36:43,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:43,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-02 19:36:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=937, Unknown=0, NotChecked=0, Total=1190 [2023-12-02 19:36:43,187 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 30 states, 29 states have (on average 3.0) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:43,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:43,465 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2023-12-02 19:36:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 19:36:43,466 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 3.0) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-12-02 19:36:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:43,467 INFO L225 Difference]: With dead ends: 123 [2023-12-02 19:36:43,467 INFO L226 Difference]: Without dead ends: 122 [2023-12-02 19:36:43,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 7 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=582, Invalid=1770, Unknown=0, NotChecked=0, Total=2352 [2023-12-02 19:36:43,469 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 129 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:43,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [129 Valid, 81 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:36:43,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-02 19:36:43,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 97. [2023-12-02 19:36:43,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 94 states have (on average 1.148936170212766) internal successors, (108), 96 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 19:36:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 108 transitions. [2023-12-02 19:36:43,479 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 108 transitions. Word has length 44 [2023-12-02 19:36:43,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:43,479 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 108 transitions. [2023-12-02 19:36:43,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 3.0) internal successors, (87), 30 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 108 transitions. [2023-12-02 19:36:43,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 19:36:43,481 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:43,481 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1] [2023-12-02 19:36:43,486 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-02 19:36:43,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 19:36:43,684 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:43,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:43,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1441336601, now seen corresponding path program 3 times [2023-12-02 19:36:43,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:43,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221461545] [2023-12-02 19:36:43,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:43,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:43,917 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:43,918 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221461545] [2023-12-02 19:36:43,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221461545] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:43,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815596088] [2023-12-02 19:36:43,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:36:43,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:43,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:43,919 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:43,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-02 19:36:43,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:36:43,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:43,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2023-12-02 19:36:43,966 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:44,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:44,231 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:44,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815596088] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:44,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [495251375] [2023-12-02 19:36:44,233 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:36:44,233 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:44,234 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:44,234 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:44,234 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:44,398 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:44,698 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2517#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_73| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_73| 256) 0)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:44,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:44,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:44,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2023-12-02 19:36:44,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344525770] [2023-12-02 19:36:44,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:44,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-02 19:36:44,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:44,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-02 19:36:44,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 19:36:44,700 INFO L87 Difference]: Start difference. First operand 97 states and 108 transitions. Second operand has 32 states, 31 states have (on average 3.064516129032258) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 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 19:36:44,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:44,976 INFO L93 Difference]: Finished difference Result 126 states and 133 transitions. [2023-12-02 19:36:44,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 19:36:44,976 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 3.064516129032258) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-12-02 19:36:44,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:44,977 INFO L225 Difference]: With dead ends: 126 [2023-12-02 19:36:44,977 INFO L226 Difference]: Without dead ends: 109 [2023-12-02 19:36:44,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=637, Invalid=1913, Unknown=0, NotChecked=0, Total=2550 [2023-12-02 19:36:44,979 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 109 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:44,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 101 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:36:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-12-02 19:36:44,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 99. [2023-12-02 19:36:44,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 96 states have (on average 1.0729166666666667) internal successors, (103), 98 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:44,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 103 transitions. [2023-12-02 19:36:44,985 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 103 transitions. Word has length 48 [2023-12-02 19:36:44,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:44,985 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 103 transitions. [2023-12-02 19:36:44,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 3.064516129032258) internal successors, (95), 32 states have internal predecessors, (95), 0 states have call successors, (0), 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 19:36:44,985 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 103 transitions. [2023-12-02 19:36:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-02 19:36:44,986 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:44,986 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1] [2023-12-02 19:36:44,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-02 19:36:45,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:45,187 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:45,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:45,187 INFO L85 PathProgramCache]: Analyzing trace with hash 196072854, now seen corresponding path program 3 times [2023-12-02 19:36:45,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:45,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548883218] [2023-12-02 19:36:45,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:45,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:45,402 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:45,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548883218] [2023-12-02 19:36:45,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548883218] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:45,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275030197] [2023-12-02 19:36:45,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:36:45,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:45,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:45,403 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:45,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-02 19:36:45,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:36:45,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:45,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 13 conjunts are in the unsatisfiable core [2023-12-02 19:36:45,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:45,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:45,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275030197] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [197187950] [2023-12-02 19:36:45,712 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:45,712 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:45,712 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:45,712 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:45,712 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:45,810 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:46,065 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3221#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:46,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:46,066 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:46,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-12-02 19:36:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283518525] [2023-12-02 19:36:46,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:46,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-02 19:36:46,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:46,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-02 19:36:46,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:36:46,068 INFO L87 Difference]: Start difference. First operand 99 states and 103 transitions. Second operand has 24 states, 23 states have (on average 5.695652173913044) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:46,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:46,134 INFO L93 Difference]: Finished difference Result 172 states and 183 transitions. [2023-12-02 19:36:46,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-02 19:36:46,135 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 5.695652173913044) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2023-12-02 19:36:46,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:46,136 INFO L225 Difference]: With dead ends: 172 [2023-12-02 19:36:46,136 INFO L226 Difference]: Without dead ends: 171 [2023-12-02 19:36:46,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 171 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2023-12-02 19:36:46,137 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:46,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 146 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 19:36:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-12-02 19:36:46,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 143. [2023-12-02 19:36:46,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 140 states have (on average 1.1214285714285714) internal successors, (157), 142 states have internal predecessors, (157), 0 states have call successors, (0), 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 19:36:46,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 157 transitions. [2023-12-02 19:36:46,147 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 157 transitions. Word has length 66 [2023-12-02 19:36:46,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:46,147 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 157 transitions. [2023-12-02 19:36:46,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 5.695652173913044) internal successors, (131), 24 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 157 transitions. [2023-12-02 19:36:46,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-02 19:36:46,149 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:46,150 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 1, 1, 1] [2023-12-02 19:36:46,154 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-02 19:36:46,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:46,354 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:46,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:46,354 INFO L85 PathProgramCache]: Analyzing trace with hash 526058076, now seen corresponding path program 3 times [2023-12-02 19:36:46,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:46,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155649841] [2023-12-02 19:36:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:46,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:46,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:47,127 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 19:36:47,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155649841] [2023-12-02 19:36:47,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155649841] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107153521] [2023-12-02 19:36:47,127 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:36:47,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:47,129 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:47,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-02 19:36:47,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:36:47,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:36:47,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-02 19:36:47,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:47,312 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 19:36:47,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:48,040 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 19:36:48,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107153521] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:48,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1958930994] [2023-12-02 19:36:48,042 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:48,042 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:48,043 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:48,043 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:48,043 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:48,163 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:48,744 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4195#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post4#1|) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:48,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:48,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:48,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2023-12-02 19:36:48,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696237676] [2023-12-02 19:36:48,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:48,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-12-02 19:36:48,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:48,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-12-02 19:36:48,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=3417, Unknown=0, NotChecked=0, Total=4422 [2023-12-02 19:36:48,748 INFO L87 Difference]: Start difference. First operand 143 states and 157 transitions. Second operand has 62 states, 61 states have (on average 3.0) internal successors, (183), 62 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:49,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:49,553 INFO L93 Difference]: Finished difference Result 247 states and 262 transitions. [2023-12-02 19:36:49,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-12-02 19:36:49,554 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 3.0) internal successors, (183), 62 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-12-02 19:36:49,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:49,555 INFO L225 Difference]: With dead ends: 247 [2023-12-02 19:36:49,555 INFO L226 Difference]: Without dead ends: 246 [2023-12-02 19:36:49,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 225 SyntacticMatches, 15 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2430, Invalid=6882, Unknown=0, NotChecked=0, Total=9312 [2023-12-02 19:36:49,559 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 307 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:49,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 156 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:36:49,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2023-12-02 19:36:49,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 193. [2023-12-02 19:36:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 190 states have (on average 1.1368421052631579) internal successors, (216), 192 states have internal predecessors, (216), 0 states have call successors, (0), 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 19:36:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 216 transitions. [2023-12-02 19:36:49,569 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 216 transitions. Word has length 92 [2023-12-02 19:36:49,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:49,569 INFO L495 AbstractCegarLoop]: Abstraction has 193 states and 216 transitions. [2023-12-02 19:36:49,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 3.0) internal successors, (183), 62 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:49,570 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 216 transitions. [2023-12-02 19:36:49,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-02 19:36:49,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:49,572 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1] [2023-12-02 19:36:49,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-02 19:36:49,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-02 19:36:49,772 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:49,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash 456014945, now seen corresponding path program 4 times [2023-12-02 19:36:49,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:49,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367332269] [2023-12-02 19:36:49,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:49,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:50,347 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:50,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367332269] [2023-12-02 19:36:50,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367332269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:50,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410070795] [2023-12-02 19:36:50,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:36:50,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:50,349 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:50,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-02 19:36:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:50,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-02 19:36:50,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:50,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:51,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410070795] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:51,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1169173057] [2023-12-02 19:36:51,262 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:36:51,262 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:51,263 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:51,263 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:51,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:51,368 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:51,994 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5396#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_128| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_128| 256) 0)) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:51,994 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:51,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:51,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-12-02 19:36:51,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311251477] [2023-12-02 19:36:51,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:51,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-12-02 19:36:51,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:51,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-12-02 19:36:51,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1070, Invalid=3622, Unknown=0, NotChecked=0, Total=4692 [2023-12-02 19:36:51,998 INFO L87 Difference]: Start difference. First operand 193 states and 216 transitions. Second operand has 64 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 64 states have internal predecessors, (191), 0 states have call successors, (0), 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 19:36:52,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:52,726 INFO L93 Difference]: Finished difference Result 242 states and 257 transitions. [2023-12-02 19:36:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-12-02 19:36:52,727 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 64 states have internal predecessors, (191), 0 states have call successors, (0), 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 96 [2023-12-02 19:36:52,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:52,728 INFO L225 Difference]: With dead ends: 242 [2023-12-02 19:36:52,729 INFO L226 Difference]: Without dead ends: 209 [2023-12-02 19:36:52,732 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 234 SyntacticMatches, 17 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3748 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2541, Invalid=7161, Unknown=0, NotChecked=0, Total=9702 [2023-12-02 19:36:52,733 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 330 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:52,733 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 161 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:36:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-12-02 19:36:52,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 195. [2023-12-02 19:36:52,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 192 states have (on average 1.0572916666666667) internal successors, (203), 194 states have internal predecessors, (203), 0 states have call successors, (0), 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 19:36:52,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 203 transitions. [2023-12-02 19:36:52,741 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 203 transitions. Word has length 96 [2023-12-02 19:36:52,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:52,741 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 203 transitions. [2023-12-02 19:36:52,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 3.0317460317460316) internal successors, (191), 64 states have internal predecessors, (191), 0 states have call successors, (0), 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 19:36:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 203 transitions. [2023-12-02 19:36:52,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-02 19:36:52,743 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:52,744 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1] [2023-12-02 19:36:52,749 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-02 19:36:52,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:52,944 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:52,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:52,944 INFO L85 PathProgramCache]: Analyzing trace with hash -264489086, now seen corresponding path program 4 times [2023-12-02 19:36:52,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:52,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288302213] [2023-12-02 19:36:52,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:52,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:53,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:53,415 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288302213] [2023-12-02 19:36:53,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288302213] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:53,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862471475] [2023-12-02 19:36:53,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:36:53,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:53,417 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:53,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-02 19:36:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:53,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2023-12-02 19:36:53,486 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:53,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 1474 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:54,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862471475] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:54,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [217784538] [2023-12-02 19:36:54,289 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:54,289 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:54,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:54,289 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:54,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:36:54,376 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:36:54,947 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '6832#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:36:54,947 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:36:54,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:36:54,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 47 [2023-12-02 19:36:54,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932901028] [2023-12-02 19:36:54,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:36:54,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-12-02 19:36:54,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:36:54,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-12-02 19:36:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1141, Invalid=1615, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 19:36:54,951 INFO L87 Difference]: Start difference. First operand 195 states and 203 transitions. Second operand has 48 states, 47 states have (on average 5.851063829787234) internal successors, (275), 48 states have internal predecessors, (275), 0 states have call successors, (0), 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 19:36:55,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:36:55,089 INFO L93 Difference]: Finished difference Result 348 states and 371 transitions. [2023-12-02 19:36:55,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-12-02 19:36:55,089 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 5.851063829787234) internal successors, (275), 48 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 138 [2023-12-02 19:36:55,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:36:55,091 INFO L225 Difference]: With dead ends: 348 [2023-12-02 19:36:55,091 INFO L226 Difference]: Without dead ends: 347 [2023-12-02 19:36:55,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 363 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1141, Invalid=1615, Unknown=0, NotChecked=0, Total=2756 [2023-12-02 19:36:55,093 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 138 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 19:36:55,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 278 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 19:36:55,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2023-12-02 19:36:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 287. [2023-12-02 19:36:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 284 states have (on average 1.1161971830985915) internal successors, (317), 286 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:36:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 317 transitions. [2023-12-02 19:36:55,105 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 317 transitions. Word has length 138 [2023-12-02 19:36:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:36:55,106 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 317 transitions. [2023-12-02 19:36:55,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 5.851063829787234) internal successors, (275), 48 states have internal predecessors, (275), 0 states have call successors, (0), 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 19:36:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 317 transitions. [2023-12-02 19:36:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2023-12-02 19:36:55,108 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:36:55,109 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 30, 1, 1, 1] [2023-12-02 19:36:55,113 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-02 19:36:55,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-02 19:36:55,309 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:36:55,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:36:55,309 INFO L85 PathProgramCache]: Analyzing trace with hash 335485164, now seen corresponding path program 4 times [2023-12-02 19:36:55,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:36:55,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589791904] [2023-12-02 19:36:55,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:36:55,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:36:55,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:57,132 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:36:57,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589791904] [2023-12-02 19:36:57,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589791904] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:36:57,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123731844] [2023-12-02 19:36:57,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:36:57,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:36:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:36:57,133 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:36:57,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-02 19:36:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:36:57,213 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 63 conjunts are in the unsatisfiable core [2023-12-02 19:36:57,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:36:57,388 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:57,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:36:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 2790 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:36:59,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123731844] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:36:59,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1112852068] [2023-12-02 19:36:59,911 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:36:59,911 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:36:59,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:36:59,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:36:59,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:37:00,003 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:37:01,464 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8814#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post4#1|) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:37:01,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:37:01,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:01,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 125 [2023-12-02 19:37:01,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005135945] [2023-12-02 19:37:01,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:01,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-12-02 19:37:01,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:01,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-12-02 19:37:01,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4045, Invalid=12985, Unknown=0, NotChecked=0, Total=17030 [2023-12-02 19:37:01,474 INFO L87 Difference]: Start difference. First operand 287 states and 317 transitions. Second operand has 126 states, 125 states have (on average 3.0) internal successors, (375), 126 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:37:04,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:37:04,142 INFO L93 Difference]: Finished difference Result 495 states and 526 transitions. [2023-12-02 19:37:04,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2023-12-02 19:37:04,143 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 3.0) internal successors, (375), 126 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 188 [2023-12-02 19:37:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:37:04,146 INFO L225 Difference]: With dead ends: 495 [2023-12-02 19:37:04,146 INFO L226 Difference]: Without dead ends: 494 [2023-12-02 19:37:04,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 465 SyntacticMatches, 31 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14028 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=9966, Invalid=27090, Unknown=0, NotChecked=0, Total=37056 [2023-12-02 19:37:04,149 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 788 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 788 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:37:04,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [788 Valid, 269 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:37:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-12-02 19:37:04,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 385. [2023-12-02 19:37:04,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 382 states have (on average 1.130890052356021) internal successors, (432), 384 states have internal predecessors, (432), 0 states have call successors, (0), 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 19:37:04,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 432 transitions. [2023-12-02 19:37:04,161 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 432 transitions. Word has length 188 [2023-12-02 19:37:04,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:37:04,162 INFO L495 AbstractCegarLoop]: Abstraction has 385 states and 432 transitions. [2023-12-02 19:37:04,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 3.0) internal successors, (375), 126 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 19:37:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 432 transitions. [2023-12-02 19:37:04,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-12-02 19:37:04,164 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:37:04,164 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1] [2023-12-02 19:37:04,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-02 19:37:04,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:04,365 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:37:04,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:37:04,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1539607281, now seen corresponding path program 5 times [2023-12-02 19:37:04,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:37:04,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364453847] [2023-12-02 19:37:04,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:37:04,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:37:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:37:06,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:06,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:37:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364453847] [2023-12-02 19:37:06,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364453847] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:37:06,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450638947] [2023-12-02 19:37:06,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:37:06,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:06,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:37:06,212 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:37:06,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-02 19:37:06,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-12-02 19:37:06,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:37:06,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 19:37:06,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:37:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:06,559 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:09,088 INFO L134 CoverageAnalysis]: Checked inductivity of 2852 backedges. 0 proven. 2852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:09,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450638947] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:37:09,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [617202285] [2023-12-02 19:37:09,090 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:37:09,090 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:37:09,090 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:37:09,090 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:37:09,090 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:37:09,203 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:37:10,723 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11223#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_227| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_227| 256) 0)) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:37:10,723 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:37:10,723 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:10,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64, 64] total 127 [2023-12-02 19:37:10,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712231246] [2023-12-02 19:37:10,724 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:10,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-12-02 19:37:10,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:10,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-12-02 19:37:10,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4174, Invalid=13382, Unknown=0, NotChecked=0, Total=17556 [2023-12-02 19:37:10,728 INFO L87 Difference]: Start difference. First operand 385 states and 432 transitions. Second operand has 128 states, 127 states have (on average 3.015748031496063) internal successors, (383), 128 states have internal predecessors, (383), 0 states have call successors, (0), 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 19:37:13,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:37:13,496 INFO L93 Difference]: Finished difference Result 474 states and 505 transitions. [2023-12-02 19:37:13,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2023-12-02 19:37:13,497 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 3.015748031496063) internal successors, (383), 128 states have internal predecessors, (383), 0 states have call successors, (0), 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 192 [2023-12-02 19:37:13,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:37:13,499 INFO L225 Difference]: With dead ends: 474 [2023-12-02 19:37:13,499 INFO L226 Difference]: Without dead ends: 409 [2023-12-02 19:37:13,501 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 700 GetRequests, 474 SyntacticMatches, 33 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14692 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=10189, Invalid=27641, Unknown=0, NotChecked=0, Total=37830 [2023-12-02 19:37:13,501 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 955 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:37:13,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 287 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:37:13,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2023-12-02 19:37:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 387. [2023-12-02 19:37:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 384 states have (on average 1.0494791666666667) internal successors, (403), 386 states have internal predecessors, (403), 0 states have call successors, (0), 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 19:37:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 403 transitions. [2023-12-02 19:37:13,514 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 403 transitions. Word has length 192 [2023-12-02 19:37:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:37:13,514 INFO L495 AbstractCegarLoop]: Abstraction has 387 states and 403 transitions. [2023-12-02 19:37:13,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 3.015748031496063) internal successors, (383), 128 states have internal predecessors, (383), 0 states have call successors, (0), 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 19:37:13,515 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 403 transitions. [2023-12-02 19:37:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2023-12-02 19:37:13,519 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:37:13,519 INFO L195 NwaCegarLoop]: trace histogram [47, 47, 47, 46, 46, 46, 1, 1, 1] [2023-12-02 19:37:13,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-02 19:37:13,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:13,720 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:37:13,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:37:13,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1426008230, now seen corresponding path program 5 times [2023-12-02 19:37:13,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:37:13,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426243463] [2023-12-02 19:37:13,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:37:13,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:37:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:37:15,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 6394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:15,309 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:37:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426243463] [2023-12-02 19:37:15,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426243463] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:37:15,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715811154] [2023-12-02 19:37:15,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:37:15,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:15,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:37:15,310 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:37:15,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-02 19:37:15,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 47 check-sat command(s) [2023-12-02 19:37:15,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:37:15,605 INFO L262 TraceCheckSpWp]: Trace formula consists of 581 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-02 19:37:15,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:37:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 6394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:15,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6394 backedges. 0 proven. 6394 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:18,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715811154] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:37:18,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1888123892] [2023-12-02 19:37:18,068 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:37:18,068 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:37:18,068 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:37:18,068 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:37:18,068 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:37:18,155 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:37:19,588 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '14123#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:37:19,588 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:37:19,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:19,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 95 [2023-12-02 19:37:19,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029364834] [2023-12-02 19:37:19,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:19,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-12-02 19:37:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-12-02 19:37:19,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4573, Invalid=5527, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 19:37:19,592 INFO L87 Difference]: Start difference. First operand 387 states and 403 transitions. Second operand has 96 states, 95 states have (on average 5.926315789473684) internal successors, (563), 96 states have internal predecessors, (563), 0 states have call successors, (0), 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 19:37:20,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:37:20,094 INFO L93 Difference]: Finished difference Result 700 states and 747 transitions. [2023-12-02 19:37:20,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2023-12-02 19:37:20,094 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 5.926315789473684) internal successors, (563), 96 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 282 [2023-12-02 19:37:20,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:37:20,097 INFO L225 Difference]: With dead ends: 700 [2023-12-02 19:37:20,097 INFO L226 Difference]: Without dead ends: 699 [2023-12-02 19:37:20,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 892 GetRequests, 747 SyntacticMatches, 46 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7136 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=4573, Invalid=5527, Unknown=0, NotChecked=0, Total=10100 [2023-12-02 19:37:20,098 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 370 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:37:20,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 526 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 19:37:20,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2023-12-02 19:37:20,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 575. [2023-12-02 19:37:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 572 states have (on average 1.1136363636363635) internal successors, (637), 574 states have internal predecessors, (637), 0 states have call successors, (0), 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 19:37:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 637 transitions. [2023-12-02 19:37:20,113 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 637 transitions. Word has length 282 [2023-12-02 19:37:20,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:37:20,113 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 637 transitions. [2023-12-02 19:37:20,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 5.926315789473684) internal successors, (563), 96 states have internal predecessors, (563), 0 states have call successors, (0), 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 19:37:20,114 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 637 transitions. [2023-12-02 19:37:20,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 381 [2023-12-02 19:37:20,115 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:37:20,115 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 63, 63, 63, 62, 1, 1, 1] [2023-12-02 19:37:20,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-02 19:37:20,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:20,316 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:37:20,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:37:20,316 INFO L85 PathProgramCache]: Analyzing trace with hash 2128021004, now seen corresponding path program 5 times [2023-12-02 19:37:20,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:37:20,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402394730] [2023-12-02 19:37:20,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:37:20,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:37:20,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:37:27,720 INFO L134 CoverageAnalysis]: Checked inductivity of 11718 backedges. 0 proven. 11718 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:27,720 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:37:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402394730] [2023-12-02 19:37:27,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402394730] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:37:27,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997968838] [2023-12-02 19:37:27,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 19:37:27,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:27,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:37:27,722 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:37:27,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-02 19:37:28,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2023-12-02 19:37:28,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:37:28,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 779 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-02 19:37:28,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:37:28,509 INFO L134 CoverageAnalysis]: Checked inductivity of 11718 backedges. 0 proven. 11718 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:28,509 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:37:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11718 backedges. 0 proven. 11718 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:37:38,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997968838] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:37:38,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1998466366] [2023-12-02 19:37:38,688 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:37:38,688 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:37:38,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:37:38,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:37:38,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:37:38,794 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:37:43,086 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18121#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post4#1|) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:37:43,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:37:43,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:37:43,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127, 127] total 253 [2023-12-02 19:37:43,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906593003] [2023-12-02 19:37:43,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:37:43,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 254 states [2023-12-02 19:37:43,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:37:43,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 254 interpolants. [2023-12-02 19:37:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16269, Invalid=50553, Unknown=0, NotChecked=0, Total=66822 [2023-12-02 19:37:43,094 INFO L87 Difference]: Start difference. First operand 575 states and 637 transitions. Second operand has 254 states, 253 states have (on average 3.0) internal successors, (759), 254 states have internal predecessors, (759), 0 states have call successors, (0), 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 19:37:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:37:54,745 INFO L93 Difference]: Finished difference Result 991 states and 1054 transitions. [2023-12-02 19:37:54,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2023-12-02 19:37:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 254 states, 253 states have (on average 3.0) internal successors, (759), 254 states have internal predecessors, (759), 0 states have call successors, (0), 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 380 [2023-12-02 19:37:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:37:54,750 INFO L225 Difference]: With dead ends: 991 [2023-12-02 19:37:54,750 INFO L226 Difference]: Without dead ends: 990 [2023-12-02 19:37:54,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1391 GetRequests, 945 SyntacticMatches, 63 SemanticMatches, 383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56748 ImplicationChecksByTransitivity, 25.3s TimeCoverageRelationStatistics Valid=40398, Invalid=107442, Unknown=0, NotChecked=0, Total=147840 [2023-12-02 19:37:54,756 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 1674 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1674 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:37:54,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1674 Valid, 537 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:37:54,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2023-12-02 19:37:54,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 769. [2023-12-02 19:37:54,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 766 states have (on average 1.1279373368146215) internal successors, (864), 768 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 19:37:54,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 864 transitions. [2023-12-02 19:37:54,775 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 864 transitions. Word has length 380 [2023-12-02 19:37:54,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:37:54,775 INFO L495 AbstractCegarLoop]: Abstraction has 769 states and 864 transitions. [2023-12-02 19:37:54,776 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 254 states, 253 states have (on average 3.0) internal successors, (759), 254 states have internal predecessors, (759), 0 states have call successors, (0), 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 19:37:54,776 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 864 transitions. [2023-12-02 19:37:54,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 385 [2023-12-02 19:37:54,777 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:37:54,777 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1] [2023-12-02 19:37:54,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-02 19:37:54,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:37:54,978 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:37:54,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:37:54,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1868503023, now seen corresponding path program 6 times [2023-12-02 19:37:54,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:37:54,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367751774] [2023-12-02 19:37:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:37:54,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:37:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:38:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 0 proven. 11844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:38:01,791 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:38:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367751774] [2023-12-02 19:38:01,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367751774] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:38:01,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507035909] [2023-12-02 19:38:01,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:38:01,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:38:01,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:38:01,793 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:38:01,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-02 19:38:01,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:38:01,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:38:01,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-02 19:38:01,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:38:02,252 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 0 proven. 11844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:38:02,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:38:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 11844 backedges. 0 proven. 11844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:38:12,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507035909] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:38:12,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [175628996] [2023-12-02 19:38:12,645 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:38:12,645 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:38:12,645 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:38:12,646 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:38:12,646 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:38:12,780 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:38:17,368 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22946#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_414| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_414| 256) 0)) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:38:17,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:38:17,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:38:17,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128, 128] total 255 [2023-12-02 19:38:17,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198109919] [2023-12-02 19:38:17,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:38:17,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 256 states [2023-12-02 19:38:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:38:17,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 256 interpolants. [2023-12-02 19:38:17,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16526, Invalid=51334, Unknown=0, NotChecked=0, Total=67860 [2023-12-02 19:38:17,379 INFO L87 Difference]: Start difference. First operand 769 states and 864 transitions. Second operand has 256 states, 255 states have (on average 3.007843137254902) internal successors, (767), 256 states have internal predecessors, (767), 0 states have call successors, (0), 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 19:38:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:38:29,197 INFO L93 Difference]: Finished difference Result 938 states and 1001 transitions. [2023-12-02 19:38:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2023-12-02 19:38:29,198 INFO L78 Accepts]: Start accepts. Automaton has has 256 states, 255 states have (on average 3.007843137254902) internal successors, (767), 256 states have internal predecessors, (767), 0 states have call successors, (0), 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 384 [2023-12-02 19:38:29,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:38:29,201 INFO L225 Difference]: With dead ends: 938 [2023-12-02 19:38:29,201 INFO L226 Difference]: Without dead ends: 809 [2023-12-02 19:38:29,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1404 GetRequests, 954 SyntacticMatches, 65 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58084 ImplicationChecksByTransitivity, 25.8s TimeCoverageRelationStatistics Valid=40845, Invalid=108537, Unknown=0, NotChecked=0, Total=149382 [2023-12-02 19:38:29,208 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 1696 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1696 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 19:38:29,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1696 Valid, 538 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 19:38:29,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2023-12-02 19:38:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 771. [2023-12-02 19:38:29,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 771 states, 768 states have (on average 1.0455729166666667) internal successors, (803), 770 states have internal predecessors, (803), 0 states have call successors, (0), 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 19:38:29,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 803 transitions. [2023-12-02 19:38:29,226 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 803 transitions. Word has length 384 [2023-12-02 19:38:29,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:38:29,227 INFO L495 AbstractCegarLoop]: Abstraction has 771 states and 803 transitions. [2023-12-02 19:38:29,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 256 states, 255 states have (on average 3.007843137254902) internal successors, (767), 256 states have internal predecessors, (767), 0 states have call successors, (0), 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 19:38:29,228 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 803 transitions. [2023-12-02 19:38:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-12-02 19:38:29,230 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:38:29,230 INFO L195 NwaCegarLoop]: trace histogram [95, 95, 95, 94, 94, 94, 1, 1, 1] [2023-12-02 19:38:29,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-02 19:38:29,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:38:29,431 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:38:29,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:38:29,431 INFO L85 PathProgramCache]: Analyzing trace with hash -469137654, now seen corresponding path program 6 times [2023-12-02 19:38:29,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:38:29,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89856112] [2023-12-02 19:38:29,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:38:29,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:38:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:38:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 26602 backedges. 0 proven. 26602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:38:35,349 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:38:35,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89856112] [2023-12-02 19:38:35,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89856112] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:38:35,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403788094] [2023-12-02 19:38:35,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:38:35,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:38:35,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:38:35,351 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:38:35,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-02 19:38:35,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:38:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:38:35,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 1157 conjuncts, 97 conjunts are in the unsatisfiable core [2023-12-02 19:38:35,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:38:36,035 INFO L134 CoverageAnalysis]: Checked inductivity of 26602 backedges. 0 proven. 26602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:38:36,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:38:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 26602 backedges. 0 proven. 26602 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:38:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403788094] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:38:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1721260351] [2023-12-02 19:38:44,500 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:38:44,500 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:38:44,500 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:38:44,500 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:38:44,500 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:38:44,582 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:38:49,199 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28774#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:38:49,199 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:38:49,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:38:49,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96, 96] total 191 [2023-12-02 19:38:49,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833076631] [2023-12-02 19:38:49,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:38:49,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2023-12-02 19:38:49,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:38:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2023-12-02 19:38:49,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18349, Invalid=20263, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 19:38:49,208 INFO L87 Difference]: Start difference. First operand 771 states and 803 transitions. Second operand has 192 states, 191 states have (on average 5.963350785340314) internal successors, (1139), 192 states have internal predecessors, (1139), 0 states have call successors, (0), 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 19:38:50,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:38:50,964 INFO L93 Difference]: Finished difference Result 1404 states and 1499 transitions. [2023-12-02 19:38:50,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2023-12-02 19:38:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 5.963350785340314) internal successors, (1139), 192 states have internal predecessors, (1139), 0 states have call successors, (0), 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 570 [2023-12-02 19:38:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:38:50,970 INFO L225 Difference]: With dead ends: 1404 [2023-12-02 19:38:50,970 INFO L226 Difference]: Without dead ends: 1403 [2023-12-02 19:38:50,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1804 GetRequests, 1515 SyntacticMatches, 94 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28112 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=18349, Invalid=20263, Unknown=0, NotChecked=0, Total=38612 [2023-12-02 19:38:50,972 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 874 mSDsluCounter, 1028 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-02 19:38:50,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 1038 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-02 19:38:50,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1403 states. [2023-12-02 19:38:50,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1403 to 1151. [2023-12-02 19:38:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1151 states, 1148 states have (on average 1.112369337979094) internal successors, (1277), 1150 states have internal predecessors, (1277), 0 states have call successors, (0), 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 19:38:50,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1151 states to 1151 states and 1277 transitions. [2023-12-02 19:38:50,997 INFO L78 Accepts]: Start accepts. Automaton has 1151 states and 1277 transitions. Word has length 570 [2023-12-02 19:38:50,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:38:50,998 INFO L495 AbstractCegarLoop]: Abstraction has 1151 states and 1277 transitions. [2023-12-02 19:38:50,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 5.963350785340314) internal successors, (1139), 192 states have internal predecessors, (1139), 0 states have call successors, (0), 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 19:38:50,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1151 states and 1277 transitions. [2023-12-02 19:38:51,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 765 [2023-12-02 19:38:51,003 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:38:51,003 INFO L195 NwaCegarLoop]: trace histogram [127, 127, 127, 127, 127, 126, 1, 1, 1] [2023-12-02 19:38:51,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-02 19:38:51,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:38:51,204 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:38:51,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:38:51,204 INFO L85 PathProgramCache]: Analyzing trace with hash 918937676, now seen corresponding path program 6 times [2023-12-02 19:38:51,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:38:51,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117466493] [2023-12-02 19:38:51,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:38:51,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:38:51,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:39:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 48006 backedges. 0 proven. 48006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:39:23,752 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:39:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117466493] [2023-12-02 19:39:23,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117466493] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:39:23,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745095396] [2023-12-02 19:39:23,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-02 19:39:23,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:39:23,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:39:23,753 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:39:23,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-02 19:39:23,995 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-02 19:39:23,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 19:39:24,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 1547 conjuncts, 255 conjunts are in the unsatisfiable core [2023-12-02 19:39:24,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:39:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 48006 backedges. 0 proven. 48006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:39:24,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:40:04,236 INFO L134 CoverageAnalysis]: Checked inductivity of 48006 backedges. 0 proven. 48006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:40:04,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745095396] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:40:04,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [697880223] [2023-12-02 19:40:04,238 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:40:04,239 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:40:04,239 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:40:04,239 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:40:04,239 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:40:04,319 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:40:19,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '36804#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_main_#t~post4#1| |ULTIMATE.start_main_~y~0#1|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (<= 2147483647 |ULTIMATE.start_main_#t~post4#1|) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:40:19,760 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:40:19,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:40:19,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [255, 255, 255] total 509 [2023-12-02 19:40:19,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671830689] [2023-12-02 19:40:19,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:40:19,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 510 states [2023-12-02 19:40:19,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:40:19,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 510 interpolants. [2023-12-02 19:40:19,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65293, Invalid=199417, Unknown=0, NotChecked=0, Total=264710 [2023-12-02 19:40:19,783 INFO L87 Difference]: Start difference. First operand 1151 states and 1277 transitions. Second operand has 510 states, 509 states have (on average 3.0) internal successors, (1527), 510 states have internal predecessors, (1527), 0 states have call successors, (0), 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 19:41:27,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:41:27,424 INFO L93 Difference]: Finished difference Result 1983 states and 2110 transitions. [2023-12-02 19:41:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 510 states. [2023-12-02 19:41:27,425 INFO L78 Accepts]: Start accepts. Automaton has has 510 states, 509 states have (on average 3.0) internal successors, (1527), 510 states have internal predecessors, (1527), 0 states have call successors, (0), 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 764 [2023-12-02 19:41:27,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:41:27,436 INFO L225 Difference]: With dead ends: 1983 [2023-12-02 19:41:27,436 INFO L226 Difference]: Without dead ends: 1982 [2023-12-02 19:41:27,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2799 GetRequests, 1905 SyntacticMatches, 127 SemanticMatches, 767 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228204 ImplicationChecksByTransitivity, 97.3s TimeCoverageRelationStatistics Valid=162702, Invalid=427890, Unknown=0, NotChecked=0, Total=590592 [2023-12-02 19:41:27,533 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4241 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4241 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-02 19:41:27,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4241 Valid, 1022 Invalid, 1587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1586 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-02 19:41:27,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1982 states. [2023-12-02 19:41:27,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1982 to 1537. [2023-12-02 19:41:27,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1534 states have (on average 1.1264667535853976) internal successors, (1728), 1536 states have internal predecessors, (1728), 0 states have call successors, (0), 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 19:41:27,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1728 transitions. [2023-12-02 19:41:27,566 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1728 transitions. Word has length 764 [2023-12-02 19:41:27,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:41:27,567 INFO L495 AbstractCegarLoop]: Abstraction has 1537 states and 1728 transitions. [2023-12-02 19:41:27,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 510 states, 509 states have (on average 3.0) internal successors, (1527), 510 states have internal predecessors, (1527), 0 states have call successors, (0), 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 19:41:27,567 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1728 transitions. [2023-12-02 19:41:27,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2023-12-02 19:41:27,571 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:41:27,571 INFO L195 NwaCegarLoop]: trace histogram [128, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1] [2023-12-02 19:41:27,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-02 19:41:27,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:41:27,772 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:41:27,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:41:27,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1525112239, now seen corresponding path program 7 times [2023-12-02 19:41:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:41:27,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009512873] [2023-12-02 19:41:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:41:27,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:41:28,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:01,055 INFO L134 CoverageAnalysis]: Checked inductivity of 48260 backedges. 0 proven. 48260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:42:01,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:42:01,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009512873] [2023-12-02 19:42:01,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009512873] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:42:01,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656312424] [2023-12-02 19:42:01,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:42:01,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:42:01,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:42:01,056 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:42:01,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-02 19:42:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:42:01,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1554 conjuncts, 256 conjunts are in the unsatisfiable core [2023-12-02 19:42:01,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:42:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 48260 backedges. 0 proven. 48260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:42:01,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:42:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 48260 backedges. 0 proven. 48260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:42:41,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656312424] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:42:41,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1880848166] [2023-12-02 19:42:41,818 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 19:42:41,818 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:42:41,818 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:42:41,818 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:42:41,818 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:42:41,912 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:42:58,167 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '46461#(and (<= 536870912 |ULTIMATE.start_main_~y~0#1|) (<= 1 |#StackHeapBarrier|) (<= |ULTIMATE.start_main_~x~0#1| 2147483647) (exists ((|v_ULTIMATE.start_main_#t~nondet3#1_777| Int)) (= (mod |v_ULTIMATE.start_main_#t~nondet3#1_777| 256) 0)) (<= |ULTIMATE.start_main_~y~0#1| 2147483647) (<= 4 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:42:58,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:42:58,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:42:58,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [256, 256, 256] total 511 [2023-12-02 19:42:58,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160507737] [2023-12-02 19:42:58,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:42:58,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 512 states [2023-12-02 19:42:58,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:42:58,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 512 interpolants. [2023-12-02 19:42:58,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65806, Invalid=200966, Unknown=0, NotChecked=0, Total=266772 [2023-12-02 19:42:58,190 INFO L87 Difference]: Start difference. First operand 1537 states and 1728 transitions. Second operand has 512 states, 511 states have (on average 3.003913894324853) internal successors, (1535), 512 states have internal predecessors, (1535), 0 states have call successors, (0), 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 19:44:05,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:44:05,394 INFO L93 Difference]: Finished difference Result 1866 states and 1993 transitions. [2023-12-02 19:44:05,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2023-12-02 19:44:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 512 states, 511 states have (on average 3.003913894324853) internal successors, (1535), 512 states have internal predecessors, (1535), 0 states have call successors, (0), 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 768 [2023-12-02 19:44:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:44:05,400 INFO L225 Difference]: With dead ends: 1866 [2023-12-02 19:44:05,400 INFO L226 Difference]: Without dead ends: 1609 [2023-12-02 19:44:05,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2812 GetRequests, 1914 SyntacticMatches, 129 SemanticMatches, 769 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230884 ImplicationChecksByTransitivity, 98.5s TimeCoverageRelationStatistics Valid=163597, Invalid=430073, Unknown=0, NotChecked=0, Total=593670 [2023-12-02 19:44:05,426 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 4230 mSDsluCounter, 1021 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4230 SdHoareTripleChecker+Valid, 1029 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-02 19:44:05,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4230 Valid, 1029 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1447 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-02 19:44:05,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1609 states. [2023-12-02 19:44:05,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1609 to 1539. [2023-12-02 19:44:05,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1536 states have (on average 1.0436197916666667) internal successors, (1603), 1538 states have internal predecessors, (1603), 0 states have call successors, (0), 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 19:44:05,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1603 transitions. [2023-12-02 19:44:05,459 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1603 transitions. Word has length 768 [2023-12-02 19:44:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:44:05,460 INFO L495 AbstractCegarLoop]: Abstraction has 1539 states and 1603 transitions. [2023-12-02 19:44:05,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 512 states, 511 states have (on average 3.003913894324853) internal successors, (1535), 512 states have internal predecessors, (1535), 0 states have call successors, (0), 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 19:44:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1603 transitions. [2023-12-02 19:44:05,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1147 [2023-12-02 19:44:05,468 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:44:05,468 INFO L195 NwaCegarLoop]: trace histogram [191, 191, 191, 190, 190, 190, 1, 1, 1] [2023-12-02 19:44:05,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-02 19:44:05,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:44:05,669 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:44:05,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:44:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash -359094678, now seen corresponding path program 7 times [2023-12-02 19:44:05,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:44:05,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315777496] [2023-12-02 19:44:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:44:05,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:44:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:44:35,539 INFO L134 CoverageAnalysis]: Checked inductivity of 108490 backedges. 0 proven. 108490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:44:35,539 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:44:35,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315777496] [2023-12-02 19:44:35,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315777496] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:44:35,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531918445] [2023-12-02 19:44:35,540 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:44:35,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:44:35,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:44:35,541 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:44:35,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-02 19:44:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:44:35,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 193 conjunts are in the unsatisfiable core [2023-12-02 19:44:35,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:44:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 108490 backedges. 0 proven. 108490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:44:36,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 19:45:10,282 INFO L134 CoverageAnalysis]: Checked inductivity of 108490 backedges. 0 proven. 108490 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:45:10,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531918445] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 19:45:10,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2054015503] [2023-12-02 19:45:10,284 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2023-12-02 19:45:10,284 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 19:45:10,284 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 19:45:10,284 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 19:45:10,284 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 19:45:10,373 INFO L180 IcfgInterpreter]: Interpretation finished [2023-12-02 19:45:27,600 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '58145#(and (<= 1 |#StackHeapBarrier|) (<= 0 |ULTIMATE.start_main_~y~0#1|) (<= 2147483644 |ULTIMATE.start_main_~x~0#1|))' at error location [2023-12-02 19:45:27,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-12-02 19:45:27,601 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 19:45:27,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [192, 192, 192] total 383 [2023-12-02 19:45:27,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519698935] [2023-12-02 19:45:27,602 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 19:45:27,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 384 states [2023-12-02 19:45:27,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 19:45:27,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 384 interpolants. [2023-12-02 19:45:27,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73549, Invalid=77383, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 19:45:27,622 INFO L87 Difference]: Start difference. First operand 1539 states and 1603 transitions. Second operand has 384 states, 383 states have (on average 5.981723237597911) internal successors, (2291), 384 states have internal predecessors, (2291), 0 states have call successors, (0), 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 19:45:40,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 19:45:40,897 INFO L93 Difference]: Finished difference Result 2812 states and 3003 transitions. [2023-12-02 19:45:40,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 384 states. [2023-12-02 19:45:40,898 INFO L78 Accepts]: Start accepts. Automaton has has 384 states, 383 states have (on average 5.981723237597911) internal successors, (2291), 384 states have internal predecessors, (2291), 0 states have call successors, (0), 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 1146 [2023-12-02 19:45:40,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 19:45:40,907 INFO L225 Difference]: With dead ends: 2812 [2023-12-02 19:45:40,907 INFO L226 Difference]: Without dead ends: 2811 [2023-12-02 19:45:40,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3628 GetRequests, 3051 SyntacticMatches, 190 SemanticMatches, 387 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111536 ImplicationChecksByTransitivity, 60.6s TimeCoverageRelationStatistics Valid=73549, Invalid=77383, Unknown=0, NotChecked=0, Total=150932 [2023-12-02 19:45:40,913 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 2162 mSDsluCounter, 2052 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2162 SdHoareTripleChecker+Valid, 2062 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-02 19:45:40,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2162 Valid, 2062 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-02 19:45:40,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2811 states. [2023-12-02 19:45:40,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2811 to 2303. [2023-12-02 19:45:40,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2300 states have (on average 1.1117391304347826) internal successors, (2557), 2302 states have internal predecessors, (2557), 0 states have call successors, (0), 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 19:45:40,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 2557 transitions. [2023-12-02 19:45:40,959 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 2557 transitions. Word has length 1146 [2023-12-02 19:45:40,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 19:45:40,960 INFO L495 AbstractCegarLoop]: Abstraction has 2303 states and 2557 transitions. [2023-12-02 19:45:40,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 384 states, 383 states have (on average 5.981723237597911) internal successors, (2291), 384 states have internal predecessors, (2291), 0 states have call successors, (0), 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 19:45:40,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 2557 transitions. [2023-12-02 19:45:40,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1533 [2023-12-02 19:45:40,973 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 19:45:40,973 INFO L195 NwaCegarLoop]: trace histogram [255, 255, 255, 255, 255, 254, 1, 1, 1] [2023-12-02 19:45:40,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-02 19:45:41,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-02 19:45:41,174 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2023-12-02 19:45:41,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 19:45:41,175 INFO L85 PathProgramCache]: Analyzing trace with hash 262116556, now seen corresponding path program 7 times [2023-12-02 19:45:41,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 19:45:41,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791653878] [2023-12-02 19:45:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 19:45:41,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 19:45:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:48:44,111 INFO L134 CoverageAnalysis]: Checked inductivity of 194310 backedges. 0 proven. 194310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:48:44,111 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 19:48:44,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791653878] [2023-12-02 19:48:44,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791653878] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 19:48:44,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520457175] [2023-12-02 19:48:44,112 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-02 19:48:44,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 19:48:44,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 19:48:44,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 19:48:44,113 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2de6a43f-6840-434e-92a9-7e8d1fc8bccb/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-02 19:48:44,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 19:48:44,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 3083 conjuncts, 511 conjunts are in the unsatisfiable core [2023-12-02 19:48:44,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 19:48:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 194310 backedges. 0 proven. 194310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 19:48:45,917 INFO L327 TraceCheckSpWp]: Computing backward predicates...