./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-memory-alloca/ex3a-alloca.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-memory-alloca/ex3a-alloca.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire --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 a5b1197714500d659d0acf4ebb2204b824a1c828702d044651e5c066ddbe97af --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:33:44,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:33:44,658 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-64bit-Taipan_Default.epf [2023-11-23 20:33:44,665 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:33:44,666 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:33:44,708 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:33:44,709 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:33:44,710 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:33:44,711 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:33:44,716 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:33:44,716 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:33:44,717 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:33:44,717 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:33:44,719 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:33:44,720 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:33:44,724 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:33:44,725 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:33:44,725 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:33:44,726 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:33:44,726 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:33:44,726 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:33:44,727 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:33:44,728 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:33:44,729 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:33:44,729 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:33:44,730 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:33:44,730 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:33:44,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:33:44,731 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:33:44,731 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 20:33:44,733 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:33:44,733 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:33:44,733 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:33:44,734 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:33:44,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:33:44,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:33:44,734 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:44,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:33:44,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:33:44,757 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:33:44,757 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:33:44,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:33:44,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:33:44,758 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:33:44,758 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:33:44,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:33:44,759 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_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5b1197714500d659d0acf4ebb2204b824a1c828702d044651e5c066ddbe97af [2023-11-23 20:33:45,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:33:45,132 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:33:45,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:33:45,136 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:33:45,137 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:33:45,139 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/termination-memory-alloca/ex3a-alloca.i [2023-11-23 20:33:48,135 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:33:48,488 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:33:48,489 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/sv-benchmarks/c/termination-memory-alloca/ex3a-alloca.i [2023-11-23 20:33:48,508 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/data/9f906e926/c22fa1a003af4405bd73f39da8a9808c/FLAGfd529abda [2023-11-23 20:33:48,527 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/data/9f906e926/c22fa1a003af4405bd73f39da8a9808c [2023-11-23 20:33:48,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:33:48,530 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:33:48,532 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:48,532 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:33:48,538 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:33:48,539 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:48,540 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@123a41f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48, skipping insertion in model container [2023-11-23 20:33:48,541 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:48,600 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:33:48,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:48,923 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:33:48,964 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:33:48,994 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:33:48,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48 WrapperNode [2023-11-23 20:33:48,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:33:48,997 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:48,997 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:33:48,997 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:33:49,004 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,035 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,077 INFO L138 Inliner]: procedures = 111, calls = 19, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 58 [2023-11-23 20:33:49,077 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:33:49,078 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:33:49,078 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:33:49,079 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:33:49,088 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,091 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,091 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,096 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,100 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,101 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,102 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,105 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:33:49,106 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:33:49,106 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:33:49,106 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:33:49,123 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (1/1) ... [2023-11-23 20:33:49,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:33:49,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:49,162 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:33:49,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:33:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:33:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:33:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 20:33:49,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 20:33:49,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:33:49,217 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:33:49,332 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:33:49,337 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:33:49,483 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:33:49,540 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:33:49,541 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 20:33:49,542 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:49 BoogieIcfgContainer [2023-11-23 20:33:49,543 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:33:49,545 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:33:49,545 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:33:49,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:33:49,550 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:33:48" (1/3) ... [2023-11-23 20:33:49,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ccf6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:49, skipping insertion in model container [2023-11-23 20:33:49,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:33:48" (2/3) ... [2023-11-23 20:33:49,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ccf6dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:33:49, skipping insertion in model container [2023-11-23 20:33:49,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:33:49" (3/3) ... [2023-11-23 20:33:49,554 INFO L112 eAbstractionObserver]: Analyzing ICFG ex3a-alloca.i [2023-11-23 20:33:49,575 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:33:49,575 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2023-11-23 20:33:49,625 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:33:49,632 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;@49584df8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:33:49,632 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-11-23 20:33:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:33:49,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:49,643 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2023-11-23 20:33:49,644 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:33:49,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:49,649 INFO L85 PathProgramCache]: Analyzing trace with hash 2065766, now seen corresponding path program 1 times [2023-11-23 20:33:49,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:49,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829450135] [2023-11-23 20:33:49,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:49,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:49,813 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:49,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743236969] [2023-11-23 20:33:49,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:49,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:49,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:49,817 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:49,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 20:33:49,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:49,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-23 20:33:49,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:50,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 20:33:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:50,395 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:50,395 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829450135] [2023-11-23 20:33:50,396 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:50,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743236969] [2023-11-23 20:33:50,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743236969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:50,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:50,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:50,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989843489] [2023-11-23 20:33:50,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:50,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:33:50,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:50,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:33:50,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:50,450 INFO L87 Difference]: Start difference. First operand has 13 states, 8 states have (on average 1.75) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:50,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:50,517 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-11-23 20:33:50,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:33:50,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2023-11-23 20:33:50,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:50,528 INFO L225 Difference]: With dead ends: 15 [2023-11-23 20:33:50,528 INFO L226 Difference]: Without dead ends: 10 [2023-11-23 20:33:50,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:50,537 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 4 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:50,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:50,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-11-23 20:33:50,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-11-23 20:33:50,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 7 states have (on average 1.4285714285714286) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2023-11-23 20:33:50,577 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 4 [2023-11-23 20:33:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:50,578 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2023-11-23 20:33:50,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:50,579 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2023-11-23 20:33:50,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:33:50,579 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:50,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 20:33:50,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:50,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-23 20:33:50,802 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:33:50,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:50,803 INFO L85 PathProgramCache]: Analyzing trace with hash 64038798, now seen corresponding path program 1 times [2023-11-23 20:33:50,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:50,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514213212] [2023-11-23 20:33:50,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:50,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:50,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:50,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879815880] [2023-11-23 20:33:50,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:50,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:50,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:50,839 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:50,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 20:33:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:50,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-23 20:33:50,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:50,955 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-11-23 20:33:50,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 20:33:50,977 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:33:51,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2023-11-23 20:33:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:51,187 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:51,187 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:51,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514213212] [2023-11-23 20:33:51,188 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:51,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879815880] [2023-11-23 20:33:51,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879815880] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:51,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:51,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:33:51,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576543873] [2023-11-23 20:33:51,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:51,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:33:51,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:51,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:33:51,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:51,192 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:51,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:51,226 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2023-11-23 20:33:51,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 20:33:51,226 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 20:33:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:51,227 INFO L225 Difference]: With dead ends: 10 [2023-11-23 20:33:51,227 INFO L226 Difference]: Without dead ends: 9 [2023-11-23 20:33:51,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:51,229 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 1 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:51,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 11 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:51,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2023-11-23 20:33:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2023-11-23 20:33:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:51,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2023-11-23 20:33:51,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2023-11-23 20:33:51,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:51,233 INFO L495 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2023-11-23 20:33:51,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:51,234 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2023-11-23 20:33:51,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-23 20:33:51,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:51,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-23 20:33:51,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:51,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 20:33:51,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:33:51,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:51,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1985202792, now seen corresponding path program 1 times [2023-11-23 20:33:51,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:51,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548085475] [2023-11-23 20:33:51,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:51,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:51,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:51,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953319603] [2023-11-23 20:33:51,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:51,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:51,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:51,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:51,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 20:33:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:51,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 20:33:51,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:51,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 20:33:51,578 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:33:51,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 32 [2023-11-23 20:33:51,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2023-11-23 20:33:51,609 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 20:33:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:51,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-23 20:33:51,700 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-23 20:33:51,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:51,707 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:51,707 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:51,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548085475] [2023-11-23 20:33:51,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:51,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953319603] [2023-11-23 20:33:51,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953319603] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:51,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:51,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:33:51,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564267467] [2023-11-23 20:33:51,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:51,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:33:51,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:51,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:33:51,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:51,710 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:51,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:51,758 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2023-11-23 20:33:51,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:51,759 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-23 20:33:51,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:51,759 INFO L225 Difference]: With dead ends: 17 [2023-11-23 20:33:51,759 INFO L226 Difference]: Without dead ends: 16 [2023-11-23 20:33:51,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:51,763 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:51,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 7 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:51,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-23 20:33:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-11-23 20:33:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:51,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-23 20:33:51,771 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 6 [2023-11-23 20:33:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:51,772 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-23 20:33:51,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:51,772 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-23 20:33:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:33:51,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:51,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:33:51,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:51,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:51,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:33:51,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:51,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1411744464, now seen corresponding path program 1 times [2023-11-23 20:33:51,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:51,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636289718] [2023-11-23 20:33:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:51,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:52,011 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:52,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044145030] [2023-11-23 20:33:52,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:52,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:52,017 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:52,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 20:33:52,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:52,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-23 20:33:52,099 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:52,111 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2023-11-23 20:33:52,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 20:33:52,130 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:33:52,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:52,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-23 20:33:52,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 20:33:52,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:52,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:52,207 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:52,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636289718] [2023-11-23 20:33:52,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:52,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044145030] [2023-11-23 20:33:52,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044145030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:52,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:52,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 20:33:52,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767900646] [2023-11-23 20:33:52,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:52,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 20:33:52,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:52,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 20:33:52,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 20:33:52,211 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:52,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:52,255 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-11-23 20:33:52,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:52,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-23 20:33:52,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:52,256 INFO L225 Difference]: With dead ends: 16 [2023-11-23 20:33:52,256 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 20:33:52,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:33:52,260 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:52,262 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 8 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:52,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 20:33:52,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 20:33:52,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:52,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-11-23 20:33:52,268 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 7 [2023-11-23 20:33:52,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:52,268 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-11-23 20:33:52,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:52,268 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-11-23 20:33:52,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:33:52,269 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:52,269 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 20:33:52,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:52,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:52,470 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:33:52,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:52,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1209346053, now seen corresponding path program 1 times [2023-11-23 20:33:52,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:52,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022991545] [2023-11-23 20:33:52,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:52,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:52,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [872878993] [2023-11-23 20:33:52,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:52,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:52,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:52,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:52,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 20:33:52,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:52,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-23 20:33:52,609 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:52,630 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-11-23 20:33:52,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 30 [2023-11-23 20:33:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:52,813 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 20:33:52,813 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:52,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022991545] [2023-11-23 20:33:52,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:52,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872878993] [2023-11-23 20:33:52,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872878993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:33:52,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:33:52,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-23 20:33:52,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264307641] [2023-11-23 20:33:52,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:33:52,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:33:52,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:33:52,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:33:52,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:33:52,817 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:33:52,860 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-11-23 20:33:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:33:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-23 20:33:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:33:52,861 INFO L225 Difference]: With dead ends: 15 [2023-11-23 20:33:52,861 INFO L226 Difference]: Without dead ends: 14 [2023-11-23 20:33:52,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:33:52,862 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 4 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:33:52,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 0 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:33:52,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-23 20:33:52,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-23 20:33:52,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:52,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-23 20:33:52,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2023-11-23 20:33:52,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:33:52,867 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-23 20:33:52,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:33:52,867 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-23 20:33:52,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:33:52,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:33:52,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1] [2023-11-23 20:33:52,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 20:33:53,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:53,078 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:33:53,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:33:53,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1164978077, now seen corresponding path program 1 times [2023-11-23 20:33:53,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:33:53,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076863186] [2023-11-23 20:33:53,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:53,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:33:53,097 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:33:53,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [502868134] [2023-11-23 20:33:53,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:33:53,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:33:53,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:33:53,099 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:33:53,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 20:33:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:33:53,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-23 20:33:53,184 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:33:53,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 20:33:53,204 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:33:53,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 32 [2023-11-23 20:33:53,221 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 1 [2023-11-23 20:33:53,232 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2023-11-23 20:33:53,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:53,274 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 12 [2023-11-23 20:33:53,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 20:33:55,356 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-23 20:33:55,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:33:55,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-23 20:33:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:55,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:33:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:33:56,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:33:56,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076863186] [2023-11-23 20:33:56,918 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:33:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502868134] [2023-11-23 20:33:56,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502868134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:33:56,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2009262296] [2023-11-23 20:33:56,939 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-23 20:33:56,939 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:33:56,942 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:33:56,948 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:33:56,948 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:03,103 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:12,343 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '369#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_test_fun_#t~malloc2#1.offset| 0) (exists ((|v_ULTIMATE.start_test_fun_#t~mem7#1_22| Int) (|v_#memory_int_39| (Array Int (Array Int Int))) (|v_ULTIMATE.start_test_fun_#t~mem8#1_22| Int)) (and (= (store |v_#memory_int_39| |ULTIMATE.start_test_fun_~x_ref~0#1.base| (store (select |v_#memory_int_39| |ULTIMATE.start_test_fun_~x_ref~0#1.base|) 0 (* |v_ULTIMATE.start_test_fun_#t~mem7#1_22| |v_ULTIMATE.start_test_fun_#t~mem8#1_22|))) |#memory_int|) (<= 0 (+ (* |v_ULTIMATE.start_test_fun_#t~mem7#1_22| |v_ULTIMATE.start_test_fun_#t~mem8#1_22|) 2147483648)) (<= (* |v_ULTIMATE.start_test_fun_#t~mem7#1_22| |v_ULTIMATE.start_test_fun_#t~mem8#1_22|) 2147483647))) (<= 2 |ULTIMATE.start_test_fun_~x_ref~0#1.base|) (<= |ULTIMATE.start_test_fun_~x#1| 2147483647) (<= 2147483647 |ULTIMATE.start_test_fun_#t~mem9#1|) (= |ULTIMATE.start_test_fun_~x_ref~0#1.offset| 0) (= |ULTIMATE.start_test_fun_#t~malloc3#1.offset| 0) (<= 0 (+ |ULTIMATE.start_test_fun_~x#1| 2147483648)) (= |ULTIMATE.start_test_fun_~c~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (<= 2 |ULTIMATE.start_test_fun_~c~0#1.base|) (= |ULTIMATE.start_test_fun_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_test_fun_~c~0#1.base|) 0)) (<= 0 (+ 2147483648 |ULTIMATE.start_test_fun_#in~x#1|)) (<= 2 |ULTIMATE.start_test_fun_#t~malloc3#1.base|) (<= 2 |ULTIMATE.start_test_fun_#t~malloc2#1.base|) (<= |ULTIMATE.start_test_fun_#in~x#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)))' at error location [2023-11-23 20:34:12,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:12,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:12,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2023-11-23 20:34:12,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360407215] [2023-11-23 20:34:12,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:12,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-23 20:34:12,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:12,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-23 20:34:12,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=206, Unknown=13, NotChecked=0, Total=272 [2023-11-23 20:34:12,347 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:34:14,679 WARN L854 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_149 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_20| Int) (v_ArrVal_147 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_147) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (or (< (select .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_20|) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_20| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_149) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647)))) (forall ((v_ArrVal_149 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_149) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647))) is different from false [2023-11-23 20:34:14,695 WARN L854 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_test_fun_#t~mem9#1| 2147483646) (forall ((v_ArrVal_149 (Array Int Int))) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |c_ULTIMATE.start_test_fun_#t~mem9#1| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_149) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647))) is different from false [2023-11-23 20:34:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:34:15,004 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-11-23 20:34:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-23 20:34:15,005 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 20:34:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:34:15,006 INFO L225 Difference]: With dead ends: 33 [2023-11-23 20:34:15,006 INFO L226 Difference]: Without dead ends: 32 [2023-11-23 20:34:15,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=84, Invalid=283, Unknown=21, NotChecked=74, Total=462 [2023-11-23 20:34:15,007 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 4 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:34:15,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 10 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 3 Unknown, 43 Unchecked, 0.3s Time] [2023-11-23 20:34:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-23 20:34:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-23 20:34:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:34:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2023-11-23 20:34:15,018 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 13 [2023-11-23 20:34:15,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:34:15,019 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2023-11-23 20:34:15,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:34:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2023-11-23 20:34:15,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:34:15,020 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:15,021 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1] [2023-11-23 20:34:15,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 20:34:15,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 20:34:15,229 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 1 more)] === [2023-11-23 20:34:15,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2110260100, now seen corresponding path program 2 times [2023-11-23 20:34:15,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:15,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652006285] [2023-11-23 20:34:15,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:15,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:15,252 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 20:34:15,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827441069] [2023-11-23 20:34:15,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 20:34:15,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 20:34:15,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:15,254 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 20:34:15,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a4c28ac3-9b0d-4782-b0ba-a5ea7a768b71/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 20:34:19,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-11-23 20:34:19,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 20:34:19,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-23 20:34:19,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 20:34:19,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 32 [2023-11-23 20:34:19,631 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 17 [2023-11-23 20:34:19,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 20:34:19,686 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 32 [2023-11-23 20:34:19,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-23 20:34:20,558 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-23 20:34:20,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 42 [2023-11-23 20:34:20,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 20:34:22,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 3 [2023-11-23 20:34:23,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 20:34:23,240 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 20:34:23,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 20:34:23,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 20:34:23,994 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2023-11-23 20:34:26,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 13 [2023-11-23 20:34:26,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-23 20:34:26,694 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2023-11-23 20:34:26,777 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:34:26,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 20:34:26,879 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_212 (Array Int Int))) (< (select (select (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647)) is different from false [2023-11-23 20:34:27,334 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210))) (let ((.cse0 (select .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse1 (store .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< (select .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse1) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647) (< 99 (select (select (store .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse1) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|))))))) is different from false [2023-11-23 20:34:27,507 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |c_ULTIMATE.start_test_fun_#t~mem9#1| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse1 (store .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< (select .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|) (< 99 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse1) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse1) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647))))) is different from false [2023-11-23 20:34:27,634 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_208 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_30| Int) (v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_208) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_30| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse0 (store .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647) (< 99 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|)) (< (select .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|) (< (select .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_30|)))))) is different from false [2023-11-23 20:34:27,925 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_208 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_30| Int) (v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |c_ULTIMATE.start_test_fun_#t~mem9#1| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_208) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_30| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse0 (store .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< 99 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|)) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647) (< (select .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_30|) (< (select .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|)))))) is different from false [2023-11-23 20:34:28,093 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_206 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_31| Int) (v_ArrVal_208 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_30| Int) (v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_206) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_31| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_208) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse3 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_30| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse1 (store .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< (select .cse0 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_31|) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse1) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647) (< (select .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|) (< 99 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse1) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|)) (< (select .cse3 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_30|))))))) is different from false [2023-11-23 20:34:28,463 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_206 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_31| Int) (v_ArrVal_208 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_30| Int) (v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |c_ULTIMATE.start_test_fun_#t~mem9#1| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_206) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse3 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_31| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_208) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_30| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse0 (store .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647) (< (select .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_30|) (< (select .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|) (< 99 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|)) (< (select .cse3 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_31|))))))) is different from false [2023-11-23 20:34:28,714 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_204 (Array Int Int)) (v_ArrVal_206 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_32| Int) (|v_ULTIMATE.start_test_fun_#t~mem9#1_31| Int) (v_ArrVal_208 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_30| Int) (v_ArrVal_210 (Array Int Int)) (|v_ULTIMATE.start_test_fun_#t~mem9#1_29| Int) (v_ArrVal_212 (Array Int Int))) (let ((.cse4 (select (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_204) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse2 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse4 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_32| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_206) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse1 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_31| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_208) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse3 (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| (store .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_30| 1))) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base|))) (let ((.cse0 (store .cse3 |c_ULTIMATE.start_test_fun_~c~0#1.offset| (+ |v_ULTIMATE.start_test_fun_#t~mem9#1_29| 1)))) (or (< 99 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_210) |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base|) |c_ULTIMATE.start_test_fun_~x_ref~0#1.offset|)) (< (select .cse1 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_30|) (< (select .cse2 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_31|) (< (select .cse3 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_29|) (< (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_test_fun_~c~0#1.base| .cse0) |c_ULTIMATE.start_test_fun_~x_ref~0#1.base| v_ArrVal_212) |c_ULTIMATE.start_test_fun_~c~0#1.base|) |c_ULTIMATE.start_test_fun_~c~0#1.offset|) 2147483647) (< (select .cse4 |c_ULTIMATE.start_test_fun_~c~0#1.offset|) |v_ULTIMATE.start_test_fun_#t~mem9#1_32|)))))))) is different from false [2023-11-23 20:34:29,712 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 2 refuted. 2 times theorem prover too weak. 0 trivial. 56 not checked. [2023-11-23 20:34:29,713 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:34:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652006285] [2023-11-23 20:34:29,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 20:34:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827441069] [2023-11-23 20:34:29,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827441069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 20:34:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2111519274] [2023-11-23 20:34:29,716 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-23 20:34:29,716 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 20:34:29,717 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 20:34:29,717 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 20:34:29,717 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 20:34:35,596 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 20:34:49,404 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '671#(and (<= 1 |#StackHeapBarrier|) (= |ULTIMATE.start_test_fun_#t~malloc2#1.offset| 0) (<= 2 |ULTIMATE.start_test_fun_~x_ref~0#1.base|) (<= |ULTIMATE.start_test_fun_~x#1| 2147483647) (<= 2147483647 |ULTIMATE.start_test_fun_#t~mem9#1|) (= |ULTIMATE.start_test_fun_~x_ref~0#1.offset| 0) (= |ULTIMATE.start_test_fun_#t~malloc3#1.offset| 0) (<= 0 (+ |ULTIMATE.start_test_fun_~x#1| 2147483648)) (= |ULTIMATE.start_test_fun_~c~0#1.offset| 0) (<= |ULTIMATE.start_main_#t~nondet11#1| 2147483647) (<= 2 |ULTIMATE.start_test_fun_~c~0#1.base|) (= |ULTIMATE.start_test_fun_#t~mem9#1| (select (select |#memory_int| |ULTIMATE.start_test_fun_~c~0#1.base|) 0)) (<= 0 (+ 2147483648 |ULTIMATE.start_test_fun_#in~x#1|)) (<= 2 |ULTIMATE.start_test_fun_#t~malloc3#1.base|) (<= 2 |ULTIMATE.start_test_fun_#t~malloc2#1.base|) (<= |ULTIMATE.start_test_fun_#in~x#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_main_#t~nondet11#1|)) (exists ((|v_ULTIMATE.start_test_fun_#t~mem7#1_30| Int) (|v_#memory_int_65| (Array Int (Array Int Int))) (|v_ULTIMATE.start_test_fun_#t~mem8#1_30| Int)) (and (= (store |v_#memory_int_65| |ULTIMATE.start_test_fun_~x_ref~0#1.base| (store (select |v_#memory_int_65| |ULTIMATE.start_test_fun_~x_ref~0#1.base|) 0 (* |v_ULTIMATE.start_test_fun_#t~mem7#1_30| |v_ULTIMATE.start_test_fun_#t~mem8#1_30|))) |#memory_int|) (<= 0 (+ (* |v_ULTIMATE.start_test_fun_#t~mem7#1_30| |v_ULTIMATE.start_test_fun_#t~mem8#1_30|) 2147483648)) (<= (* |v_ULTIMATE.start_test_fun_#t~mem7#1_30| |v_ULTIMATE.start_test_fun_#t~mem8#1_30|) 2147483647))))' at error location [2023-11-23 20:34:49,404 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 20:34:49,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-23 20:34:49,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 28 [2023-11-23 20:34:49,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32411202] [2023-11-23 20:34:49,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-23 20:34:49,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-23 20:34:49,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:34:49,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-23 20:34:49,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=646, Unknown=21, NotChecked=488, Total=1332 [2023-11-23 20:34:49,408 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 30 states, 29 states have (on average 2.1379310344827585) internal successors, (62), 29 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)