./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/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_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 12:51:18,699 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 12:51:18,764 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-12-02 12:51:18,768 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 12:51:18,769 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 12:51:18,793 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 12:51:18,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 12:51:18,794 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 12:51:18,795 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 12:51:18,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 12:51:18,796 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 12:51:18,796 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 12:51:18,797 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 12:51:18,797 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 12:51:18,797 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 12:51:18,798 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 12:51:18,798 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 12:51:18,799 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 12:51:18,799 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 12:51:18,800 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 12:51:18,800 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 12:51:18,801 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 12:51:18,802 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 12:51:18,802 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 12:51:18,803 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 12:51:18,803 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 12:51:18,803 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 12:51:18,804 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 12:51:18,804 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 12:51:18,805 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-12-02 12:51:18,805 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-12-02 12:51:18,805 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 12:51:18,806 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 12:51:18,806 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 12:51:18,807 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 12:51:18,807 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 12:51:18,807 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:51:18,808 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 12:51:18,808 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 12:51:18,808 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 12:51:18,808 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 12:51:18,809 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 12:51:18,809 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 12:51:18,809 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 12:51:18,809 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 12:51:18,809 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 12:51:18,810 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_e6499b2b-63b7-44ee-9afc-a6410bb877fc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d925f1aaa578011e84cee59af464c9f4e53ab5dc54b7f9269f34505d8383253a [2023-12-02 12:51:19,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 12:51:19,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 12:51:19,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 12:51:19,063 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 12:51:19,064 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 12:51:19,065 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2023-12-02 12:51:21,901 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 12:51:22,074 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 12:51:22,075 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/sv-benchmarks/c/termination-crafted/NestedRecursion_1a-2.c [2023-12-02 12:51:22,081 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/data/979fd5824/ed96325ee7954c6985d88812938e50d4/FLAGc2cf4f7f8 [2023-12-02 12:51:22,095 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/data/979fd5824/ed96325ee7954c6985d88812938e50d4 [2023-12-02 12:51:22,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 12:51:22,099 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 12:51:22,100 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 12:51:22,100 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 12:51:22,105 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 12:51:22,106 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,107 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@145e6e76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22, skipping insertion in model container [2023-12-02 12:51:22,107 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,125 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 12:51:22,269 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:51:22,275 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 12:51:22,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 12:51:22,305 INFO L206 MainTranslator]: Completed translation [2023-12-02 12:51:22,306 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22 WrapperNode [2023-12-02 12:51:22,306 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 12:51:22,307 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 12:51:22,307 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 12:51:22,307 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 12:51:22,314 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,334 INFO L138 Inliner]: procedures = 6, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 12 [2023-12-02 12:51:22,334 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 12:51:22,335 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 12:51:22,335 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 12:51:22,335 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 12:51:22,344 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,344 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,346 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,346 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,348 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,350 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,351 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,353 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 12:51:22,356 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 12:51:22,356 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 12:51:22,356 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 12:51:22,357 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (1/1) ... [2023-12-02 12:51:22,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 12:51:22,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:22,387 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 12:51:22,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 12:51:22,428 INFO L130 BoogieDeclarations]: Found specification of procedure rec1 [2023-12-02 12:51:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure rec1 [2023-12-02 12:51:22,429 INFO L130 BoogieDeclarations]: Found specification of procedure rec2 [2023-12-02 12:51:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure rec2 [2023-12-02 12:51:22,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 12:51:22,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 12:51:22,504 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 12:51:22,507 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 12:51:22,665 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 12:51:22,685 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 12:51:22,685 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-12-02 12:51:22,687 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:51:22 BoogieIcfgContainer [2023-12-02 12:51:22,687 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 12:51:22,691 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 12:51:22,691 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 12:51:22,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 12:51:22,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 12:51:22" (1/3) ... [2023-12-02 12:51:22,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3eba38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:51:22, skipping insertion in model container [2023-12-02 12:51:22,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 12:51:22" (2/3) ... [2023-12-02 12:51:22,697 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d3eba38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 12:51:22, skipping insertion in model container [2023-12-02 12:51:22,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:51:22" (3/3) ... [2023-12-02 12:51:22,699 INFO L112 eAbstractionObserver]: Analyzing ICFG NestedRecursion_1a-2.c [2023-12-02 12:51:22,722 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 12:51:22,722 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2023-12-02 12:51:22,783 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 12:51:22,791 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;@30bde2aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 12:51:22,792 INFO L358 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2023-12-02 12:51:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-02 12:51:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 12:51:22,806 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:22,806 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 12:51:22,807 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:22,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:22,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1442097593, now seen corresponding path program 1 times [2023-12-02 12:51:22,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:22,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473986298] [2023-12-02 12:51:22,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:22,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:22,987 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 12:51:22,987 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:22,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473986298] [2023-12-02 12:51:22,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473986298] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:22,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:22,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:51:22,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445535220] [2023-12-02 12:51:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:22,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:51:22,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:51:23,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:51:23,030 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.52) internal successors, (38), 35 states have internal predecessors, (38), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,072 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2023-12-02 12:51:23,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:51:23,075 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 12:51:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,085 INFO L225 Difference]: With dead ends: 46 [2023-12-02 12:51:23,085 INFO L226 Difference]: Without dead ends: 42 [2023-12-02 12:51:23,088 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 12:51:23,092 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:23,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 81 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:23,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-02 12:51:23,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-12-02 12:51:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 32 states have internal predecessors, (34), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-02 12:51:23,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-12-02 12:51:23,142 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 6 [2023-12-02 12:51:23,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,143 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-12-02 12:51:23,143 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-12-02 12:51:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-02 12:51:23,144 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,144 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 12:51:23,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1755352361, now seen corresponding path program 1 times [2023-12-02 12:51:23,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470663442] [2023-12-02 12:51:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:23,222 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 12:51:23,222 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:23,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470663442] [2023-12-02 12:51:23,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470663442] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 12:51:23,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045086025] [2023-12-02 12:51:23,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:23,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:51:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:51:23,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:51:23,226 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,290 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-12-02 12:51:23,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-02 12:51:23,291 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 12:51:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,292 INFO L225 Difference]: With dead ends: 55 [2023-12-02 12:51:23,292 INFO L226 Difference]: Without dead ends: 52 [2023-12-02 12:51:23,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:51:23,294 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 28 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:23,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 145 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-12-02 12:51:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2023-12-02 12:51:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 39 states have internal predecessors, (43), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:51:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2023-12-02 12:51:23,308 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 7 [2023-12-02 12:51:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,308 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2023-12-02 12:51:23,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2023-12-02 12:51:23,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-02 12:51:23,309 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,309 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 12:51:23,310 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,311 INFO L85 PathProgramCache]: Analyzing trace with hash 576061948, now seen corresponding path program 1 times [2023-12-02 12:51:23,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111769658] [2023-12-02 12:51:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:23,346 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 12:51:23,346 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:23,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111769658] [2023-12-02 12:51:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111769658] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:23,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:51:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266604127] [2023-12-02 12:51:23,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:23,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:51:23,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:51:23,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:51:23,350 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,368 INFO L93 Difference]: Finished difference Result 52 states and 64 transitions. [2023-12-02 12:51:23,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:51:23,369 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-02 12:51:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,370 INFO L225 Difference]: With dead ends: 52 [2023-12-02 12:51:23,371 INFO L226 Difference]: Without dead ends: 51 [2023-12-02 12:51:23,371 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 12:51:23,373 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 15 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 69 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 12:51:23,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 69 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:23,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-02 12:51:23,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-12-02 12:51:23,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-02 12:51:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2023-12-02 12:51:23,386 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 11 [2023-12-02 12:51:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,387 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2023-12-02 12:51:23,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2023-12-02 12:51:23,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-02 12:51:23,388 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,388 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 12:51:23,388 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,389 INFO L85 PathProgramCache]: Analyzing trace with hash 678051242, now seen corresponding path program 1 times [2023-12-02 12:51:23,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911103012] [2023-12-02 12:51:23,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:23,485 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 12:51:23,486 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:23,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911103012] [2023-12-02 12:51:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911103012] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:23,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-02 12:51:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719181437] [2023-12-02 12:51:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:23,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-02 12:51:23,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-02 12:51:23,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:51:23,489 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,615 INFO L93 Difference]: Finished difference Result 74 states and 87 transitions. [2023-12-02 12:51:23,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:51:23,616 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 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 12:51:23,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,617 INFO L225 Difference]: With dead ends: 74 [2023-12-02 12:51:23,617 INFO L226 Difference]: Without dead ends: 73 [2023-12-02 12:51:23,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:51:23,620 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 53 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:23,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 167 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:51:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-12-02 12:51:23,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 65. [2023-12-02 12:51:23,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.372093023255814) internal successors, (59), 50 states have internal predecessors, (59), 11 states have call successors, (11), 4 states have call predecessors, (11), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-02 12:51:23,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 80 transitions. [2023-12-02 12:51:23,636 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 80 transitions. Word has length 12 [2023-12-02 12:51:23,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,637 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 80 transitions. [2023-12-02 12:51:23,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 12:51:23,637 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 80 transitions. [2023-12-02 12:51:23,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-02 12:51:23,638 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,638 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-12-02 12:51:23,638 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1701183343, now seen corresponding path program 1 times [2023-12-02 12:51:23,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2766318] [2023-12-02 12:51:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:23,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 12:51:23,703 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:23,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2766318] [2023-12-02 12:51:23,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2766318] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:23,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:51:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346021484] [2023-12-02 12:51:23,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:23,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:51:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:51:23,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 12:51:23,706 INFO L87 Difference]: Start difference. First operand 65 states and 80 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:23,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,774 INFO L93 Difference]: Finished difference Result 128 states and 166 transitions. [2023-12-02 12:51:23,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 12:51:23,775 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-12-02 12:51:23,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,776 INFO L225 Difference]: With dead ends: 128 [2023-12-02 12:51:23,776 INFO L226 Difference]: Without dead ends: 71 [2023-12-02 12:51:23,778 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:51:23,779 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 26 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:23,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 95 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:23,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-12-02 12:51:23,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 67. [2023-12-02 12:51:23,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 52 states have internal predecessors, (60), 11 states have call successors, (11), 4 states have call predecessors, (11), 4 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2023-12-02 12:51:23,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2023-12-02 12:51:23,795 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 18 [2023-12-02 12:51:23,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,796 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2023-12-02 12:51:23,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2023-12-02 12:51:23,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-02 12:51:23,797 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,797 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-02 12:51:23,797 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -719559311, now seen corresponding path program 1 times [2023-12-02 12:51:23,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623517087] [2023-12-02 12:51:23,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:51:23,844 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:23,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623517087] [2023-12-02 12:51:23,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623517087] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:23,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:23,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:51:23,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102034042] [2023-12-02 12:51:23,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:23,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:51:23,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:51:23,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:51:23,847 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:23,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,878 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2023-12-02 12:51:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:51:23,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-12-02 12:51:23,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,881 INFO L225 Difference]: With dead ends: 90 [2023-12-02 12:51:23,882 INFO L226 Difference]: Without dead ends: 89 [2023-12-02 12:51:23,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:51:23,883 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 8 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:23,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 113 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-12-02 12:51:23,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 73. [2023-12-02 12:51:23,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 56 states have internal predecessors, (65), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-02 12:51:23,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2023-12-02 12:51:23,899 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 19 [2023-12-02 12:51:23,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,900 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2023-12-02 12:51:23,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:23,900 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2023-12-02 12:51:23,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-02 12:51:23,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,901 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-12-02 12:51:23,902 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash -831502117, now seen corresponding path program 1 times [2023-12-02 12:51:23,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122350265] [2023-12-02 12:51:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:51:23,937 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:23,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122350265] [2023-12-02 12:51:23,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122350265] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:23,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:23,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:51:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922487204] [2023-12-02 12:51:23,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:23,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:51:23,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:23,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:51:23,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:51:23,939 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:23,954 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2023-12-02 12:51:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:51:23,955 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2023-12-02 12:51:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:23,956 INFO L225 Difference]: With dead ends: 73 [2023-12-02 12:51:23,957 INFO L226 Difference]: Without dead ends: 72 [2023-12-02 12:51:23,957 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 12:51:23,958 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 7 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:23,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 69 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:23,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-02 12:51:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-12-02 12:51:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 55 states have internal predecessors, (63), 11 states have call successors, (11), 4 states have call predecessors, (11), 5 states have return successors, (16), 12 states have call predecessors, (16), 10 states have call successors, (16) [2023-12-02 12:51:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2023-12-02 12:51:23,972 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 20 [2023-12-02 12:51:23,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:23,972 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2023-12-02 12:51:23,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:23,973 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2023-12-02 12:51:23,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-02 12:51:23,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:23,974 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:23,974 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-12-02 12:51:23,975 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:23,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:23,975 INFO L85 PathProgramCache]: Analyzing trace with hash 252324898, now seen corresponding path program 1 times [2023-12-02 12:51:23,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:23,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735429261] [2023-12-02 12:51:23,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:23,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:23,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,054 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 12:51:24,054 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:24,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735429261] [2023-12-02 12:51:24,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735429261] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:24,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:24,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:51:24,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144013838] [2023-12-02 12:51:24,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:24,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:51:24,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:24,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:51:24,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:51:24,057 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:24,149 INFO L93 Difference]: Finished difference Result 156 states and 213 transitions. [2023-12-02 12:51:24,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:51:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2023-12-02 12:51:24,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:24,151 INFO L225 Difference]: With dead ends: 156 [2023-12-02 12:51:24,151 INFO L226 Difference]: Without dead ends: 92 [2023-12-02 12:51:24,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:51:24,155 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 10 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:24,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 178 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:24,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-12-02 12:51:24,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 80. [2023-12-02 12:51:24,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 62 states have internal predecessors, (68), 13 states have call successors, (13), 5 states have call predecessors, (13), 6 states have return successors, (18), 12 states have call predecessors, (18), 12 states have call successors, (18) [2023-12-02 12:51:24,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 99 transitions. [2023-12-02 12:51:24,171 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 99 transitions. Word has length 25 [2023-12-02 12:51:24,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:24,171 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 99 transitions. [2023-12-02 12:51:24,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-02 12:51:24,171 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 99 transitions. [2023-12-02 12:51:24,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-02 12:51:24,173 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:24,173 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-12-02 12:51:24,173 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:24,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1845121388, now seen corresponding path program 1 times [2023-12-02 12:51:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:24,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505226613] [2023-12-02 12:51:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:24,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-02 12:51:24,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:24,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505226613] [2023-12-02 12:51:24,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505226613] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:24,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:24,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:51:24,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530044490] [2023-12-02 12:51:24,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:24,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:51:24,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:24,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:51:24,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:51:24,255 INFO L87 Difference]: Start difference. First operand 80 states and 99 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:51:24,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:24,320 INFO L93 Difference]: Finished difference Result 168 states and 221 transitions. [2023-12-02 12:51:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:51:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2023-12-02 12:51:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:24,322 INFO L225 Difference]: With dead ends: 168 [2023-12-02 12:51:24,323 INFO L226 Difference]: Without dead ends: 96 [2023-12-02 12:51:24,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-12-02 12:51:24,325 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:24,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 189 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:24,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-12-02 12:51:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2023-12-02 12:51:24,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 67 states have internal predecessors, (73), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 12:51:24,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2023-12-02 12:51:24,340 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 36 [2023-12-02 12:51:24,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:24,341 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2023-12-02 12:51:24,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2023-12-02 12:51:24,341 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2023-12-02 12:51:24,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-12-02 12:51:24,343 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:24,343 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:24,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-12-02 12:51:24,343 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:24,344 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:24,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1238701033, now seen corresponding path program 1 times [2023-12-02 12:51:24,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:24,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095416864] [2023-12-02 12:51:24,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:24,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:24,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-02 12:51:24,378 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:24,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095416864] [2023-12-02 12:51:24,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095416864] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:24,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:24,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:51:24,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420003141] [2023-12-02 12:51:24,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:24,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:51:24,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:24,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:51:24,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:51:24,380 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:51:24,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:24,395 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2023-12-02 12:51:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:51:24,395 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-12-02 12:51:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:24,397 INFO L225 Difference]: With dead ends: 88 [2023-12-02 12:51:24,397 INFO L226 Difference]: Without dead ends: 87 [2023-12-02 12:51:24,397 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 12:51:24,398 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:24,399 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 75 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-12-02 12:51:24,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2023-12-02 12:51:24,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 66 states have internal predecessors, (71), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 14 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 12:51:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 106 transitions. [2023-12-02 12:51:24,412 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 106 transitions. Word has length 33 [2023-12-02 12:51:24,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:24,412 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 106 transitions. [2023-12-02 12:51:24,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 9.0) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:51:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 106 transitions. [2023-12-02 12:51:24,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-02 12:51:24,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:24,414 INFO L195 NwaCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:24,414 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-02 12:51:24,414 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:24,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:24,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1008483268, now seen corresponding path program 1 times [2023-12-02 12:51:24,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:24,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985025030] [2023-12-02 12:51:24,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:24,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-12-02 12:51:24,462 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:24,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985025030] [2023-12-02 12:51:24,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985025030] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:24,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:24,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:51:24,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792155439] [2023-12-02 12:51:24,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:24,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:51:24,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:51:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:51:24,464 INFO L87 Difference]: Start difference. First operand 87 states and 106 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:51:24,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:24,485 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2023-12-02 12:51:24,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:51:24,486 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-12-02 12:51:24,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:24,487 INFO L225 Difference]: With dead ends: 94 [2023-12-02 12:51:24,487 INFO L226 Difference]: Without dead ends: 93 [2023-12-02 12:51:24,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:51:24,489 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 0 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:24,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:24,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-12-02 12:51:24,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2023-12-02 12:51:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.1846153846153846) internal successors, (77), 70 states have internal predecessors, (77), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 12:51:24,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 112 transitions. [2023-12-02 12:51:24,501 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 112 transitions. Word has length 39 [2023-12-02 12:51:24,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:24,502 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 112 transitions. [2023-12-02 12:51:24,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:51:24,502 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 112 transitions. [2023-12-02 12:51:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-02 12:51:24,504 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:24,504 INFO L195 NwaCegarLoop]: trace histogram [6, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:24,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-12-02 12:51:24,505 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:24,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:24,505 INFO L85 PathProgramCache]: Analyzing trace with hash 1395647584, now seen corresponding path program 1 times [2023-12-02 12:51:24,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:24,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400996686] [2023-12-02 12:51:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:24,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,585 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:51:24,585 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:24,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400996686] [2023-12-02 12:51:24,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400996686] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:24,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:24,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 12:51:24,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851160661] [2023-12-02 12:51:24,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:24,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:51:24,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:24,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:51:24,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-12-02 12:51:24,588 INFO L87 Difference]: Start difference. First operand 93 states and 112 transitions. Second operand has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:51:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:24,635 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2023-12-02 12:51:24,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:51:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2023-12-02 12:51:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:24,637 INFO L225 Difference]: With dead ends: 103 [2023-12-02 12:51:24,637 INFO L226 Difference]: Without dead ends: 102 [2023-12-02 12:51:24,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-12-02 12:51:24,639 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 7 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:24,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 165 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:24,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-12-02 12:51:24,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 92. [2023-12-02 12:51:24,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 69 states have internal predecessors, (75), 15 states have call successors, (15), 6 states have call predecessors, (15), 7 states have return successors, (20), 16 states have call predecessors, (20), 14 states have call successors, (20) [2023-12-02 12:51:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 110 transitions. [2023-12-02 12:51:24,650 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 110 transitions. Word has length 48 [2023-12-02 12:51:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:24,650 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 110 transitions. [2023-12-02 12:51:24,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.8) internal successors, (24), 6 states have internal predecessors, (24), 1 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:51:24,651 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 110 transitions. [2023-12-02 12:51:24,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-02 12:51:24,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:24,652 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:24,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-12-02 12:51:24,653 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:24,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1420295783, now seen corresponding path program 1 times [2023-12-02 12:51:24,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:24,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386392192] [2023-12-02 12:51:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:24,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:51:24,750 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:24,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386392192] [2023-12-02 12:51:24,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386392192] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:51:24,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820473311] [2023-12-02 12:51:24,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:24,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:24,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:24,753 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:24,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 12:51:24,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:24,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:51:24,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:51:24,902 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:51:24,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:51:25,080 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 12:51:25,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820473311] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:51:25,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1562966536] [2023-12-02 12:51:25,102 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-12-02 12:51:25,102 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:51:25,105 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 12:51:25,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:51:25,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-12-02 12:51:25,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654731834] [2023-12-02 12:51:25,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:51:25,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-02 12:51:25,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:25,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-02 12:51:25,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-12-02 12:51:25,110 INFO L87 Difference]: Start difference. First operand 92 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 12:51:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:25,400 INFO L93 Difference]: Finished difference Result 192 states and 248 transitions. [2023-12-02 12:51:25,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-02 12:51:25,401 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2023-12-02 12:51:25,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:25,403 INFO L225 Difference]: With dead ends: 192 [2023-12-02 12:51:25,404 INFO L226 Difference]: Without dead ends: 190 [2023-12-02 12:51:25,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2023-12-02 12:51:25,405 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 92 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:25,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 374 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:51:25,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-12-02 12:51:25,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 117. [2023-12-02 12:51:25,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 87 states have internal predecessors, (95), 20 states have call successors, (20), 7 states have call predecessors, (20), 10 states have return successors, (34), 22 states have call predecessors, (34), 19 states have call successors, (34) [2023-12-02 12:51:25,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 149 transitions. [2023-12-02 12:51:25,425 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 149 transitions. Word has length 42 [2023-12-02 12:51:25,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:25,425 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 149 transitions. [2023-12-02 12:51:25,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 3 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 1 states have call successors, (6) [2023-12-02 12:51:25,426 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 149 transitions. [2023-12-02 12:51:25,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-02 12:51:25,427 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:25,427 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:25,439 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-02 12:51:25,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-02 12:51:25,633 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:25,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:25,633 INFO L85 PathProgramCache]: Analyzing trace with hash 653818833, now seen corresponding path program 1 times [2023-12-02 12:51:25,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:25,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241411998] [2023-12-02 12:51:25,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:25,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:25,728 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2023-12-02 12:51:25,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:25,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241411998] [2023-12-02 12:51:25,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241411998] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:51:25,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777675865] [2023-12-02 12:51:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:25,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:25,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:25,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:25,733 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-02 12:51:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:25,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 12:51:25,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:51:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-12-02 12:51:25,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:51:25,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777675865] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:25,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:51:25,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-12-02 12:51:25,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495226479] [2023-12-02 12:51:25,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:25,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-02 12:51:25,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:25,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-02 12:51:25,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:51:25,841 INFO L87 Difference]: Start difference. First operand 117 states and 149 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:51:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:25,960 INFO L93 Difference]: Finished difference Result 151 states and 192 transitions. [2023-12-02 12:51:25,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:51:25,962 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 54 [2023-12-02 12:51:25,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:25,964 INFO L225 Difference]: With dead ends: 151 [2023-12-02 12:51:25,964 INFO L226 Difference]: Without dead ends: 150 [2023-12-02 12:51:25,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-12-02 12:51:25,965 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 28 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:25,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 175 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 12:51:25,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-02 12:51:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 144. [2023-12-02 12:51:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 102 states have (on average 1.1470588235294117) internal successors, (117), 107 states have internal predecessors, (117), 25 states have call successors, (25), 8 states have call predecessors, (25), 12 states have return successors, (41), 28 states have call predecessors, (41), 24 states have call successors, (41) [2023-12-02 12:51:25,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 183 transitions. [2023-12-02 12:51:25,979 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 183 transitions. Word has length 54 [2023-12-02 12:51:25,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:25,979 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 183 transitions. [2023-12-02 12:51:25,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-02 12:51:25,980 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 183 transitions. [2023-12-02 12:51:25,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-02 12:51:25,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:25,981 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:25,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-02 12:51:26,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:26,185 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:26,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:26,185 INFO L85 PathProgramCache]: Analyzing trace with hash -895915619, now seen corresponding path program 1 times [2023-12-02 12:51:26,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:26,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284646581] [2023-12-02 12:51:26,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:26,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:26,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:26,220 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 12:51:26,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:26,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284646581] [2023-12-02 12:51:26,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284646581] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:26,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:26,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 12:51:26,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525749750] [2023-12-02 12:51:26,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:26,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 12:51:26,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:26,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 12:51:26,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:51:26,223 INFO L87 Difference]: Start difference. First operand 144 states and 183 transitions. Second operand has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:51:26,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:26,246 INFO L93 Difference]: Finished difference Result 158 states and 205 transitions. [2023-12-02 12:51:26,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 12:51:26,246 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2023-12-02 12:51:26,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:26,248 INFO L225 Difference]: With dead ends: 158 [2023-12-02 12:51:26,248 INFO L226 Difference]: Without dead ends: 157 [2023-12-02 12:51:26,249 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 12:51:26,249 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 106 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 12:51:26,250 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 106 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:26,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-02 12:51:26,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2023-12-02 12:51:26,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 114 states have internal predecessors, (125), 25 states have call successors, (25), 8 states have call predecessors, (25), 14 states have return successors, (47), 31 states have call predecessors, (47), 24 states have call successors, (47) [2023-12-02 12:51:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 197 transitions. [2023-12-02 12:51:26,266 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 197 transitions. Word has length 44 [2023-12-02 12:51:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:26,266 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 197 transitions. [2023-12-02 12:51:26,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 1 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:51:26,267 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 197 transitions. [2023-12-02 12:51:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-02 12:51:26,267 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:26,268 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:26,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-12-02 12:51:26,268 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:26,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:26,269 INFO L85 PathProgramCache]: Analyzing trace with hash -2003580343, now seen corresponding path program 1 times [2023-12-02 12:51:26,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:26,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175277540] [2023-12-02 12:51:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:26,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-02 12:51:26,297 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:26,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175277540] [2023-12-02 12:51:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175277540] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:26,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 12:51:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896156709] [2023-12-02 12:51:26,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:26,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 12:51:26,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:26,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 12:51:26,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 12:51:26,299 INFO L87 Difference]: Start difference. First operand 154 states and 197 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:51:26,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:26,314 INFO L93 Difference]: Finished difference Result 154 states and 197 transitions. [2023-12-02 12:51:26,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 12:51:26,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 45 [2023-12-02 12:51:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:26,316 INFO L225 Difference]: With dead ends: 154 [2023-12-02 12:51:26,316 INFO L226 Difference]: Without dead ends: 150 [2023-12-02 12:51:26,317 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 12:51:26,317 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 1 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:26,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 71 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-02 12:51:26,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2023-12-02 12:51:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 107 states have (on average 1.1121495327102804) internal successors, (119), 111 states have internal predecessors, (119), 25 states have call successors, (25), 8 states have call predecessors, (25), 14 states have return successors, (45), 30 states have call predecessors, (45), 24 states have call successors, (45) [2023-12-02 12:51:26,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 189 transitions. [2023-12-02 12:51:26,333 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 189 transitions. Word has length 45 [2023-12-02 12:51:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:26,334 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 189 transitions. [2023-12-02 12:51:26,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-12-02 12:51:26,334 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 189 transitions. [2023-12-02 12:51:26,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 12:51:26,335 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:26,335 INFO L195 NwaCegarLoop]: trace histogram [11, 8, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:26,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-12-02 12:51:26,336 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:26,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:26,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2078772712, now seen corresponding path program 2 times [2023-12-02 12:51:26,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:26,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880413228] [2023-12-02 12:51:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:26,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:26,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:26,477 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 75 proven. 28 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2023-12-02 12:51:26,477 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:26,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880413228] [2023-12-02 12:51:26,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880413228] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:51:26,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599697427] [2023-12-02 12:51:26,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-02 12:51:26,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:26,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:26,479 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:26,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-02 12:51:26,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-12-02 12:51:26,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-02 12:51:26,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 12:51:26,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:51:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2023-12-02 12:51:26,570 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 12:51:26,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599697427] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:26,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-02 12:51:26,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2023-12-02 12:51:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066322639] [2023-12-02 12:51:26,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:26,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 12:51:26,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 12:51:26,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2023-12-02 12:51:26,573 INFO L87 Difference]: Start difference. First operand 150 states and 189 transitions. Second operand has 5 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:51:26,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:26,640 INFO L93 Difference]: Finished difference Result 151 states and 189 transitions. [2023-12-02 12:51:26,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-02 12:51:26,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 84 [2023-12-02 12:51:26,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:26,642 INFO L225 Difference]: With dead ends: 151 [2023-12-02 12:51:26,642 INFO L226 Difference]: Without dead ends: 150 [2023-12-02 12:51:26,643 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2023-12-02 12:51:26,643 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 27 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:26,644 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 151 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:26,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-12-02 12:51:26,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2023-12-02 12:51:26,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 107 states have (on average 1.102803738317757) internal successors, (118), 110 states have internal predecessors, (118), 25 states have call successors, (25), 8 states have call predecessors, (25), 14 states have return successors, (45), 30 states have call predecessors, (45), 24 states have call successors, (45) [2023-12-02 12:51:26,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 188 transitions. [2023-12-02 12:51:26,658 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 188 transitions. Word has length 84 [2023-12-02 12:51:26,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:26,659 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 188 transitions. [2023-12-02 12:51:26,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 8.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-12-02 12:51:26,659 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 188 transitions. [2023-12-02 12:51:26,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-02 12:51:26,660 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:26,660 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:26,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-02 12:51:26,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-02 12:51:26,861 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:26,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:26,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1224623314, now seen corresponding path program 1 times [2023-12-02 12:51:26,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:26,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679269949] [2023-12-02 12:51:26,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:26,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:26,956 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2023-12-02 12:51:26,956 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679269949] [2023-12-02 12:51:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679269949] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 12:51:26,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 12:51:26,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-02 12:51:26,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107117616] [2023-12-02 12:51:26,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 12:51:26,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:51:26,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:26,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:51:26,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:51:26,958 INFO L87 Difference]: Start difference. First operand 149 states and 188 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 12:51:27,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:27,016 INFO L93 Difference]: Finished difference Result 149 states and 188 transitions. [2023-12-02 12:51:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-02 12:51:27,017 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 84 [2023-12-02 12:51:27,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:27,018 INFO L225 Difference]: With dead ends: 149 [2023-12-02 12:51:27,018 INFO L226 Difference]: Without dead ends: 128 [2023-12-02 12:51:27,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-02 12:51:27,019 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:27,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 144 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:27,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-12-02 12:51:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 114. [2023-12-02 12:51:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 83 states have (on average 1.0843373493975903) internal successors, (90), 85 states have internal predecessors, (90), 19 states have call successors, (19), 7 states have call predecessors, (19), 10 states have return successors, (31), 21 states have call predecessors, (31), 16 states have call successors, (31) [2023-12-02 12:51:27,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 140 transitions. [2023-12-02 12:51:27,029 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 140 transitions. Word has length 84 [2023-12-02 12:51:27,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:27,030 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 140 transitions. [2023-12-02 12:51:27,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2023-12-02 12:51:27,030 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 140 transitions. [2023-12-02 12:51:27,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2023-12-02 12:51:27,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 12:51:27,036 INFO L195 NwaCegarLoop]: trace histogram [55, 52, 36, 19, 19, 19, 19, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:27,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-12-02 12:51:27,036 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW === [rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 7 more)] === [2023-12-02 12:51:27,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 12:51:27,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1750597362, now seen corresponding path program 1 times [2023-12-02 12:51:27,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 12:51:27,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733679937] [2023-12-02 12:51:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:27,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 12:51:27,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:27,513 INFO L134 CoverageAnalysis]: Checked inductivity of 7427 backedges. 101 proven. 520 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2023-12-02 12:51:27,513 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 12:51:27,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733679937] [2023-12-02 12:51:27,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733679937] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 12:51:27,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723223664] [2023-12-02 12:51:27,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 12:51:27,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:27,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 12:51:27,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 12:51:27,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-02 12:51:27,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 12:51:27,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 871 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-02 12:51:27,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 12:51:27,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7427 backedges. 1432 proven. 2 refuted. 0 times theorem prover too weak. 5993 trivial. 0 not checked. [2023-12-02 12:51:27,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 12:51:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 7427 backedges. 101 proven. 520 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2023-12-02 12:51:28,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723223664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 12:51:28,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [986955811] [2023-12-02 12:51:28,241 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-12-02 12:51:28,241 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 12:51:28,242 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:96) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-02 12:51:28,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-12-02 12:51:28,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2023-12-02 12:51:28,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744465603] [2023-12-02 12:51:28,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-12-02 12:51:28,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-02 12:51:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 12:51:28,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-02 12:51:28,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-02 12:51:28,246 INFO L87 Difference]: Start difference. First operand 114 states and 140 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 12:51:28,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 12:51:28,312 INFO L93 Difference]: Finished difference Result 155 states and 189 transitions. [2023-12-02 12:51:28,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-02 12:51:28,313 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) Word has length 436 [2023-12-02 12:51:28,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 12:51:28,314 INFO L225 Difference]: With dead ends: 155 [2023-12-02 12:51:28,314 INFO L226 Difference]: Without dead ends: 0 [2023-12-02 12:51:28,314 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 882 GetRequests, 867 SyntacticMatches, 5 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2023-12-02 12:51:28,315 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 12:51:28,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 140 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 12:51:28,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-02 12:51:28,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-02 12:51:28,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 12:51:28,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-02 12:51:28,316 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 436 [2023-12-02 12:51:28,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 12:51:28,317 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-02 12:51:28,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 7 states have internal predecessors, (44), 3 states have call successors, (12), 3 states have call predecessors, (12), 4 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2023-12-02 12:51:28,317 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-02 12:51:28,317 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-02 12:51:28,319 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (9 of 10 remaining) [2023-12-02 12:51:28,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (8 of 10 remaining) [2023-12-02 12:51:28,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (7 of 10 remaining) [2023-12-02 12:51:28,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (6 of 10 remaining) [2023-12-02 12:51:28,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 10 remaining) [2023-12-02 12:51:28,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 10 remaining) [2023-12-02 12:51:28,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 10 remaining) [2023-12-02 12:51:28,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 10 remaining) [2023-12-02 12:51:28,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 10 remaining) [2023-12-02 12:51:28,321 INFO L805 garLoopResultBuilder]: Registering result SAFE for location rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 10 remaining) [2023-12-02 12:51:28,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-02 12:51:28,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 12:51:28,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-02 12:51:28,828 INFO L899 garLoopResultBuilder]: For program point rec1Err4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,829 INFO L899 garLoopResultBuilder]: For program point rec1FINAL(lines 11 15) no Hoare annotation was computed. [2023-12-02 12:51:28,829 INFO L899 garLoopResultBuilder]: For program point rec1Err5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,829 INFO L899 garLoopResultBuilder]: For program point rec1EXIT(lines 11 15) no Hoare annotation was computed. [2023-12-02 12:51:28,829 INFO L899 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,829 INFO L899 garLoopResultBuilder]: For program point L14-1(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,829 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 13) no Hoare annotation was computed. [2023-12-02 12:51:28,830 INFO L895 garLoopResultBuilder]: At program point L14-2(line 14) the Hoare annotation is: (and (or (and (<= |rec1_#in~i| rec1_~i) (<= rec1_~i 2147483647)) (< 2147483647 |rec1_#in~i|)) (< 0 |rec1_#in~i|)) [2023-12-02 12:51:28,830 INFO L899 garLoopResultBuilder]: For program point L14-3(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,830 INFO L899 garLoopResultBuilder]: For program point L14-4(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,830 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 15) the Hoare annotation is: true [2023-12-02 12:51:28,830 INFO L899 garLoopResultBuilder]: For program point rec1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,830 INFO L899 garLoopResultBuilder]: For program point L14-5(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,830 INFO L895 garLoopResultBuilder]: At program point L14-6(line 14) the Hoare annotation is: (and (let ((.cse0 (<= |rec1_#in~i| rec1_~i)) (.cse1 (<= rec1_~i 2147483647))) (or (and .cse0 .cse1 (<= |rec1_#t~ret0| 0)) (and (= |rec1_#t~ret0| 1) .cse0 .cse1) (< 2147483647 |rec1_#in~i|))) (< 0 |rec1_#in~i|)) [2023-12-02 12:51:28,831 INFO L899 garLoopResultBuilder]: For program point rec1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,831 INFO L899 garLoopResultBuilder]: For program point rec1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,831 INFO L899 garLoopResultBuilder]: For program point L14-7(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,831 INFO L899 garLoopResultBuilder]: For program point rec1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L895 garLoopResultBuilder]: At program point L14-8(line 14) the Hoare annotation is: (and (or (and (<= |rec1_#t~ret1| 0) (<= |rec1_#in~i| rec1_~i) (<= rec1_~i 2147483647) (<= |rec1_#t~ret0| 1)) (< 2147483647 |rec1_#in~i|)) (< 0 |rec1_#in~i|)) [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point L14-9(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point L14-10(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point L14-11(line 14) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point rec2Err3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point rec2FINAL(lines 17 21) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point rec2EXIT(lines 17 21) no Hoare annotation was computed. [2023-12-02 12:51:28,832 INFO L899 garLoopResultBuilder]: For program point L20(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,833 INFO L899 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,833 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 19) no Hoare annotation was computed. [2023-12-02 12:51:28,833 INFO L895 garLoopResultBuilder]: At program point L20-2(line 20) the Hoare annotation is: (or (and (<= |rec2_#in~j| rec2_~j) (<= 1 rec2_~j) (<= rec2_~j 2147483646)) (<= 2147483647 |rec2_#in~j|)) [2023-12-02 12:51:28,833 INFO L899 garLoopResultBuilder]: For program point L20-3(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,833 INFO L895 garLoopResultBuilder]: At program point L20-4(line 20) the Hoare annotation is: (or (and (<= |rec2_#t~ret3| 2147483646) (<= |rec2_#in~j| rec2_~j) (<= 1 |rec2_#t~ret3|) (<= 1 rec2_~j) (<= rec2_~j 2147483646)) (<= 2147483647 |rec2_#in~j|)) [2023-12-02 12:51:28,833 INFO L899 garLoopResultBuilder]: For program point L20-5(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,833 INFO L899 garLoopResultBuilder]: For program point L20-6(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,834 INFO L899 garLoopResultBuilder]: For program point L20-7(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,834 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 21) the Hoare annotation is: true [2023-12-02 12:51:28,834 INFO L899 garLoopResultBuilder]: For program point rec2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,834 INFO L899 garLoopResultBuilder]: For program point rec2Err0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,834 INFO L899 garLoopResultBuilder]: For program point rec2Err1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 20) no Hoare annotation was computed. [2023-12-02 12:51:28,834 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-02 12:51:28,834 INFO L895 garLoopResultBuilder]: At program point L27(line 27) the Hoare annotation is: (<= |ULTIMATE.start_main_~x~0#1| 2147483646) [2023-12-02 12:51:28,834 INFO L899 garLoopResultBuilder]: For program point L26(line 26) no Hoare annotation was computed. [2023-12-02 12:51:28,835 INFO L899 garLoopResultBuilder]: For program point L27-1(line 27) no Hoare annotation was computed. [2023-12-02 12:51:28,835 INFO L899 garLoopResultBuilder]: For program point L23(lines 23 28) no Hoare annotation was computed. [2023-12-02 12:51:28,835 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-02 12:51:28,838 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 12:51:28,840 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-12-02 12:51:28,844 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 12:51:28 BoogieIcfgContainer [2023-12-02 12:51:28,844 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-02 12:51:28,845 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-12-02 12:51:28,845 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-12-02 12:51:28,845 INFO L274 PluginConnector]: Witness Printer initialized [2023-12-02 12:51:28,846 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 12:51:22" (3/4) ... [2023-12-02 12:51:28,848 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-12-02 12:51:28,851 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec1 [2023-12-02 12:51:28,851 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure rec2 [2023-12-02 12:51:28,856 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2023-12-02 12:51:28,856 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2023-12-02 12:51:28,857 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-12-02 12:51:28,942 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/witness.graphml [2023-12-02 12:51:28,942 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/witness.yml [2023-12-02 12:51:28,943 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-12-02 12:51:28,943 INFO L158 Benchmark]: Toolchain (without parser) took 6844.30ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 128.5MB in the beginning and 94.8MB in the end (delta: 33.6MB). Peak memory consumption was 68.9MB. Max. memory is 16.1GB. [2023-12-02 12:51:28,944 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory was 57.7MB in the beginning and 57.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:51:28,944 INFO L158 Benchmark]: CACSL2BoogieTranslator took 206.12ms. Allocated memory is still 167.8MB. Free memory was 128.5MB in the beginning and 118.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:51:28,945 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.43ms. Allocated memory is still 167.8MB. Free memory was 118.8MB in the beginning and 117.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 12:51:28,945 INFO L158 Benchmark]: Boogie Preprocessor took 19.90ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.8MB in the end (delta: 842.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 12:51:28,946 INFO L158 Benchmark]: RCFGBuilder took 331.66ms. Allocated memory is still 167.8MB. Free memory was 116.3MB in the beginning and 105.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-12-02 12:51:28,946 INFO L158 Benchmark]: TraceAbstraction took 6153.59ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 105.0MB in the beginning and 99.0MB in the end (delta: 6.0MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. [2023-12-02 12:51:28,947 INFO L158 Benchmark]: Witness Printer took 97.70ms. Allocated memory is still 201.3MB. Free memory was 99.0MB in the beginning and 94.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-12-02 12:51:28,949 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 107.0MB. Free memory was 57.7MB in the beginning and 57.6MB in the end (delta: 139.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 206.12ms. Allocated memory is still 167.8MB. Free memory was 128.5MB in the beginning and 118.8MB in the end (delta: 9.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 27.43ms. Allocated memory is still 167.8MB. Free memory was 118.8MB in the beginning and 117.6MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 19.90ms. Allocated memory is still 167.8MB. Free memory was 117.6MB in the beginning and 116.8MB in the end (delta: 842.3kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 331.66ms. Allocated memory is still 167.8MB. Free memory was 116.3MB in the beginning and 105.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 6153.59ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 105.0MB in the beginning and 99.0MB in the end (delta: 6.0MB). Peak memory consumption was 41.6MB. Max. memory is 16.1GB. * Witness Printer took 97.70ms. Allocated memory is still 201.3MB. Free memory was 99.0MB in the beginning and 94.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 20]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 6.1s, OverallIterations: 19, TraceHistogramMax: 55, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 380 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 339 mSDsluCounter, 2619 SdHoareTripleChecker+Invalid, 0.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1885 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 723 IncrementalHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 734 mSDtfsCounter, 723 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1211 GetRequests, 1098 SyntacticMatches, 5 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=154occurred in iteration=15, InterpolantAutomatonStates: 121, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 161 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 207 PreInvPairs, 215 NumberOfFragments, 103 HoareAnnotationTreeSize, 207 FomulaSimplifications, 267 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 393 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 1679 NumberOfCodeBlocks, 1613 NumberOfCodeBlocksAsserted, 24 NumberOfCheckSat, 2132 ConstructedInterpolants, 0 QuantifiedInterpolants, 2570 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1098 ConjunctsInSsa, 24 ConjunctsInUnsatCore, 25 InterpolantComputations, 17 PerfectInterpolantSequences, 22195/23273 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 10 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-12-02 12:51:28,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e6499b2b-63b7-44ee-9afc-a6410bb877fc/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE