./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c --full-output --architecture 32bit -------------------------------------------------------------------------------- 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_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/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_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/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 32bit --witnessprinter.graph.data.programhash d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:28:12,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:28:13,027 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Overflow-32bit-Taipan_Default.epf [2023-11-23 21:28:13,038 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:28:13,039 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:28:13,084 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:28:13,085 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:28:13,085 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:28:13,086 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:28:13,091 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:28:13,092 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:28:13,093 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:28:13,094 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:28:13,095 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:28:13,096 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:28:13,096 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:28:13,097 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:28:13,097 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:28:13,098 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:28:13,098 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:28:13,099 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:28:13,100 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:28:13,101 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:28:13,101 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:28:13,102 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:28:13,102 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:28:13,103 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:28:13,103 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:28:13,104 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:28:13,104 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:28:13,105 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:28:13,106 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 21:28:13,106 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:28:13,106 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:28:13,107 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:28:13,107 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:28:13,107 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:28:13,107 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:28:13,108 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:28:13,108 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:13,108 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:28:13,109 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:28:13,109 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:28:13,109 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:28:13,110 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:28:13,110 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:28:13,110 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:28:13,110 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:28:13,111 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:28:13,111 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_e70fd8ad-aaca-4f43-970c-c6728b13da50/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d3c61dee0c4c48de96844df391dc470a843cae078bb175116ed4a6b789669168 [2023-11-23 21:28:13,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:28:13,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:28:13,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:28:13,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:28:13,495 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:28:13,496 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2023-11-23 21:28:16,798 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:28:16,989 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:28:16,990 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/sv-benchmarks/c/nla-digbench-scaling/cohencu-ll_valuebound20.c [2023-11-23 21:28:16,998 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/data/0d2116632/21d4eef0258d4af693beaebb6d7e8edc/FLAG7821f10fd [2023-11-23 21:28:17,019 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/data/0d2116632/21d4eef0258d4af693beaebb6d7e8edc [2023-11-23 21:28:17,028 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:28:17,031 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:28:17,035 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:17,036 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:28:17,041 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:28:17,042 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,043 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@577b3802 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17, skipping insertion in model container [2023-11-23 21:28:17,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,067 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:28:17,330 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:17,346 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:28:17,395 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:28:17,421 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:28:17,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17 WrapperNode [2023-11-23 21:28:17,422 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:28:17,423 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:17,423 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:28:17,424 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:28:17,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,451 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,497 INFO L138 Inliner]: procedures = 14, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 192 [2023-11-23 21:28:17,505 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:28:17,506 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:28:17,506 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:28:17,506 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:28:17,516 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,528 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,529 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,541 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,558 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,560 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,563 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:28:17,565 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:28:17,566 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:28:17,567 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:28:17,568 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (1/1) ... [2023-11-23 21:28:17,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:28:17,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:17,613 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:28:17,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:28:17,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:28:17,655 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:28:17,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:28:17,656 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:28:17,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-23 21:28:17,658 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-23 21:28:17,725 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:28:17,728 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:28:18,562 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:28:18,610 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:28:18,610 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:28:18,612 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:18 BoogieIcfgContainer [2023-11-23 21:28:18,612 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:28:18,614 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:28:18,615 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:28:18,618 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:28:18,618 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:28:17" (1/3) ... [2023-11-23 21:28:18,619 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4d4709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:18, skipping insertion in model container [2023-11-23 21:28:18,619 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:28:17" (2/3) ... [2023-11-23 21:28:18,620 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b4d4709 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:28:18, skipping insertion in model container [2023-11-23 21:28:18,620 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:28:18" (3/3) ... [2023-11-23 21:28:18,621 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound20.c [2023-11-23 21:28:18,647 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:28:18,647 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 138 error locations. [2023-11-23 21:28:18,708 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:28:18,716 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;@3bce4ef6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:28:18,716 INFO L358 AbstractCegarLoop]: Starting to check reachability of 138 error locations. [2023-11-23 21:28:18,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 294 states, 143 states have (on average 1.979020979020979) internal successors, (283), 281 states have internal predecessors, (283), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-11-23 21:28:18,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:28:18,728 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:18,729 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:28:18,730 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:18,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash 379211, now seen corresponding path program 1 times [2023-11-23 21:28:18,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:18,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008568935] [2023-11-23 21:28:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:18,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:19,022 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 21:28:19,023 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:19,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008568935] [2023-11-23 21:28:19,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008568935] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:19,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:19,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:28:19,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894637598] [2023-11-23 21:28:19,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:19,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:19,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:19,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:19,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:19,075 INFO L87 Difference]: Start difference. First operand has 294 states, 143 states have (on average 1.979020979020979) internal successors, (283), 281 states have internal predecessors, (283), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 21:28:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:19,353 INFO L93 Difference]: Finished difference Result 737 states and 778 transitions. [2023-11-23 21:28:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:19,356 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 3 [2023-11-23 21:28:19,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:19,377 INFO L225 Difference]: With dead ends: 737 [2023-11-23 21:28:19,378 INFO L226 Difference]: Without dead ends: 533 [2023-11-23 21:28:19,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:19,389 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 238 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:19,391 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 516 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:28:19,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2023-11-23 21:28:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 343. [2023-11-23 21:28:19,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 196 states have (on average 1.8112244897959184) internal successors, (355), 326 states have internal predecessors, (355), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:28:19,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 385 transitions. [2023-11-23 21:28:19,495 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 385 transitions. Word has length 3 [2023-11-23 21:28:19,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:19,495 INFO L495 AbstractCegarLoop]: Abstraction has 343 states and 385 transitions. [2023-11-23 21:28:19,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 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 21:28:19,498 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 385 transitions. [2023-11-23 21:28:19,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 21:28:19,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:19,501 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:19,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:28:19,503 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:19,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:19,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1690271346, now seen corresponding path program 1 times [2023-11-23 21:28:19,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:19,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473188870] [2023-11-23 21:28:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:19,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:19,556 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:19,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [393166139] [2023-11-23 21:28:19,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:19,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:19,565 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:19,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:28:19,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:19,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:28:19,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:19,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:19,891 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:19,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473188870] [2023-11-23 21:28:19,892 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:19,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393166139] [2023-11-23 21:28:19,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393166139] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:19,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:19,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:19,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026830784] [2023-11-23 21:28:19,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:19,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:19,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:19,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:19,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:19,904 INFO L87 Difference]: Start difference. First operand 343 states and 385 transitions. Second operand has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:20,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:20,653 INFO L93 Difference]: Finished difference Result 541 states and 560 transitions. [2023-11-23 21:28:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 30 [2023-11-23 21:28:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:20,657 INFO L225 Difference]: With dead ends: 541 [2023-11-23 21:28:20,658 INFO L226 Difference]: Without dead ends: 486 [2023-11-23 21:28:20,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:20,664 INFO L413 NwaCegarLoop]: 158 mSDtfsCounter, 172 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:20,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 257 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:28:20,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2023-11-23 21:28:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 428. [2023-11-23 21:28:20,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 276 states have (on average 1.6594202898550725) internal successors, (458), 406 states have internal predecessors, (458), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:20,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2023-11-23 21:28:20,705 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 30 [2023-11-23 21:28:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:20,706 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2023-11-23 21:28:20,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 11.0) internal successors, (22), 3 states have internal predecessors, (22), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2023-11-23 21:28:20,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 21:28:20,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:20,708 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:20,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:20,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-23 21:28:20,924 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr20ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:20,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash -853122704, now seen corresponding path program 1 times [2023-11-23 21:28:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:20,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188179402] [2023-11-23 21:28:20,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:20,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:20,951 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:20,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750132668] [2023-11-23 21:28:20,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:20,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:20,958 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:20,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:28:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:21,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:28:21,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:21,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:21,124 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:21,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188179402] [2023-11-23 21:28:21,124 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:21,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750132668] [2023-11-23 21:28:21,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750132668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:21,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:21,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:21,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166601431] [2023-11-23 21:28:21,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:21,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:21,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:21,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:21,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:21,128 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:21,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:21,740 INFO L93 Difference]: Finished difference Result 481 states and 505 transitions. [2023-11-23 21:28:21,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:21,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 32 [2023-11-23 21:28:21,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:21,744 INFO L225 Difference]: With dead ends: 481 [2023-11-23 21:28:21,745 INFO L226 Difference]: Without dead ends: 476 [2023-11-23 21:28:21,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:21,747 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 163 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:21,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 397 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:28:21,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-23 21:28:21,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 428. [2023-11-23 21:28:21,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 276 states have (on average 1.641304347826087) internal successors, (453), 406 states have internal predecessors, (453), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:21,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 493 transitions. [2023-11-23 21:28:21,765 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 493 transitions. Word has length 32 [2023-11-23 21:28:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:21,765 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 493 transitions. [2023-11-23 21:28:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:21,766 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 493 transitions. [2023-11-23 21:28:21,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 21:28:21,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:21,767 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:21,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:21,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:21,986 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr21ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:21,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:21,987 INFO L85 PathProgramCache]: Analyzing trace with hash -676999953, now seen corresponding path program 1 times [2023-11-23 21:28:21,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:21,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075418582] [2023-11-23 21:28:21,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:21,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:22,016 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:22,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50486489] [2023-11-23 21:28:22,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:22,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:22,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:22,025 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:22,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-23 21:28:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:22,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:28:22,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:22,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:22,139 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:22,140 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:22,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075418582] [2023-11-23 21:28:22,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:22,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50486489] [2023-11-23 21:28:22,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50486489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:22,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:22,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:22,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337222505] [2023-11-23 21:28:22,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:22,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:22,145 INFO L87 Difference]: Start difference. First operand 428 states and 493 transitions. Second operand has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:22,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:22,564 INFO L93 Difference]: Finished difference Result 481 states and 500 transitions. [2023-11-23 21:28:22,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:22,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-23 21:28:22,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:22,568 INFO L225 Difference]: With dead ends: 481 [2023-11-23 21:28:22,569 INFO L226 Difference]: Without dead ends: 476 [2023-11-23 21:28:22,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:22,570 INFO L413 NwaCegarLoop]: 206 mSDtfsCounter, 157 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:22,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 402 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:28:22,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2023-11-23 21:28:22,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 428. [2023-11-23 21:28:22,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 276 states have (on average 1.6231884057971016) internal successors, (448), 406 states have internal predecessors, (448), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 488 transitions. [2023-11-23 21:28:22,603 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 488 transitions. Word has length 33 [2023-11-23 21:28:22,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:22,604 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 488 transitions. [2023-11-23 21:28:22,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.5) internal successors, (25), 3 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 488 transitions. [2023-11-23 21:28:22,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 21:28:22,607 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:22,608 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:22,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:22,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:22,816 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr22ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:22,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:22,817 INFO L85 PathProgramCache]: Analyzing trace with hash 487838034, now seen corresponding path program 1 times [2023-11-23 21:28:22,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:22,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093319542] [2023-11-23 21:28:22,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:22,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:22,846 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:22,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25328547] [2023-11-23 21:28:22,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:22,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:22,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:22,848 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:22,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:28:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:22,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:28:22,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:22,982 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:22,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:22,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093319542] [2023-11-23 21:28:22,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:22,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25328547] [2023-11-23 21:28:22,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25328547] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:22,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:22,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:22,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884833883] [2023-11-23 21:28:22,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:22,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:22,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:22,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:22,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:22,985 INFO L87 Difference]: Start difference. First operand 428 states and 488 transitions. Second operand has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:24,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:24,111 INFO L93 Difference]: Finished difference Result 476 states and 495 transitions. [2023-11-23 21:28:24,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 34 [2023-11-23 21:28:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:24,115 INFO L225 Difference]: With dead ends: 476 [2023-11-23 21:28:24,115 INFO L226 Difference]: Without dead ends: 474 [2023-11-23 21:28:24,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:24,116 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 327 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:24,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 344 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-23 21:28:24,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2023-11-23 21:28:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 428. [2023-11-23 21:28:24,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 276 states have (on average 1.6159420289855073) internal successors, (446), 406 states have internal predecessors, (446), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:24,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 486 transitions. [2023-11-23 21:28:24,135 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 486 transitions. Word has length 34 [2023-11-23 21:28:24,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:24,136 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 486 transitions. [2023-11-23 21:28:24,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 8.666666666666666) internal successors, (26), 4 states have internal predecessors, (26), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:24,136 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 486 transitions. [2023-11-23 21:28:24,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 21:28:24,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:24,137 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:24,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:24,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:24,359 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr23ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:24,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:24,359 INFO L85 PathProgramCache]: Analyzing trace with hash -2056890031, now seen corresponding path program 1 times [2023-11-23 21:28:24,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:24,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129653984] [2023-11-23 21:28:24,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:24,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:24,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:24,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267409907] [2023-11-23 21:28:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:24,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:24,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:24,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:24,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-23 21:28:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:24,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:28:24,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:24,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:24,501 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:24,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129653984] [2023-11-23 21:28:24,502 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267409907] [2023-11-23 21:28:24,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267409907] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:24,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:24,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688592738] [2023-11-23 21:28:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:24,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:24,505 INFO L87 Difference]: Start difference. First operand 428 states and 486 transitions. Second operand has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:25,251 INFO L93 Difference]: Finished difference Result 474 states and 493 transitions. [2023-11-23 21:28:25,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:25,252 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2023-11-23 21:28:25,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:25,255 INFO L225 Difference]: With dead ends: 474 [2023-11-23 21:28:25,255 INFO L226 Difference]: Without dead ends: 472 [2023-11-23 21:28:25,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:25,258 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 322 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:25,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 346 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:28:25,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2023-11-23 21:28:25,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 428. [2023-11-23 21:28:25,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 276 states have (on average 1.608695652173913) internal successors, (444), 406 states have internal predecessors, (444), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:25,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 484 transitions. [2023-11-23 21:28:25,278 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 484 transitions. Word has length 35 [2023-11-23 21:28:25,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:25,278 INFO L495 AbstractCegarLoop]: Abstraction has 428 states and 484 transitions. [2023-11-23 21:28:25,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 9.0) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:25,279 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 484 transitions. [2023-11-23 21:28:25,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 21:28:25,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:25,280 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:25,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:25,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-23 21:28:25,502 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr26ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:25,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:25,502 INFO L85 PathProgramCache]: Analyzing trace with hash -512401130, now seen corresponding path program 1 times [2023-11-23 21:28:25,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:25,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39192686] [2023-11-23 21:28:25,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:25,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:25,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:25,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125919402] [2023-11-23 21:28:25,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:25,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:25,523 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:25,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-23 21:28:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:25,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-23 21:28:25,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:25,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:25,780 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:25,780 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:25,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39192686] [2023-11-23 21:28:25,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:25,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125919402] [2023-11-23 21:28:25,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125919402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:25,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:25,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:25,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984972077] [2023-11-23 21:28:25,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:25,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:25,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:25,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:25,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:25,783 INFO L87 Difference]: Start difference. First operand 428 states and 484 transitions. Second operand has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:26,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:26,248 INFO L93 Difference]: Finished difference Result 472 states and 491 transitions. [2023-11-23 21:28:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:26,251 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 38 [2023-11-23 21:28:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:26,254 INFO L225 Difference]: With dead ends: 472 [2023-11-23 21:28:26,254 INFO L226 Difference]: Without dead ends: 458 [2023-11-23 21:28:26,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:26,256 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 134 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:26,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 239 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 346 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 21:28:26,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2023-11-23 21:28:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 431. [2023-11-23 21:28:26,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 279 states have (on average 1.5627240143369177) internal successors, (436), 409 states have internal predecessors, (436), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 476 transitions. [2023-11-23 21:28:26,281 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 476 transitions. Word has length 38 [2023-11-23 21:28:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:26,281 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 476 transitions. [2023-11-23 21:28:26,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.0) internal successors, (30), 3 states have internal predecessors, (30), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 476 transitions. [2023-11-23 21:28:26,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 21:28:26,283 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:26,283 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:26,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:26,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-23 21:28:26,496 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr27ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:26,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:26,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1295434261, now seen corresponding path program 1 times [2023-11-23 21:28:26,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:26,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453525921] [2023-11-23 21:28:26,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:26,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:26,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:26,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [526599184] [2023-11-23 21:28:26,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:26,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:26,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:26,524 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:26,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:28:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:26,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-23 21:28:26,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:26,753 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:26,754 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:26,754 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:26,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453525921] [2023-11-23 21:28:26,754 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:26,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526599184] [2023-11-23 21:28:26,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526599184] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:26,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:26,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:26,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872632369] [2023-11-23 21:28:26,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:26,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:26,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:26,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:26,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:26,758 INFO L87 Difference]: Start difference. First operand 431 states and 476 transitions. Second operand has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:27,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:27,514 INFO L93 Difference]: Finished difference Result 458 states and 477 transitions. [2023-11-23 21:28:27,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:27,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2023-11-23 21:28:27,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:27,518 INFO L225 Difference]: With dead ends: 458 [2023-11-23 21:28:27,518 INFO L226 Difference]: Without dead ends: 455 [2023-11-23 21:28:27,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:27,520 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 282 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:27,520 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 282 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:28:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2023-11-23 21:28:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 431. [2023-11-23 21:28:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 279 states have (on average 1.5519713261648747) internal successors, (433), 409 states have internal predecessors, (433), 20 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2023-11-23 21:28:27,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 473 transitions. [2023-11-23 21:28:27,543 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 473 transitions. Word has length 39 [2023-11-23 21:28:27,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:27,544 INFO L495 AbstractCegarLoop]: Abstraction has 431 states and 473 transitions. [2023-11-23 21:28:27,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.333333333333334) internal successors, (31), 4 states have internal predecessors, (31), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:27,544 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 473 transitions. [2023-11-23 21:28:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 21:28:27,552 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:27,552 INFO L195 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:27,576 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:27,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-23 21:28:27,764 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr31ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:27,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:27,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1902176985, now seen corresponding path program 1 times [2023-11-23 21:28:27,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:27,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976263530] [2023-11-23 21:28:27,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:27,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:27,780 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:27,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1794180055] [2023-11-23 21:28:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:27,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:27,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:27,782 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:27,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-23 21:28:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:27,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-23 21:28:27,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:28,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:28:28,173 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:28,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:28,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976263530] [2023-11-23 21:28:28,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:28,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794180055] [2023-11-23 21:28:28,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794180055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:28,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:28,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:28,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817106205] [2023-11-23 21:28:28,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:28,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:28,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:28,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:28,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:28,175 INFO L87 Difference]: Start difference. First operand 431 states and 473 transitions. Second operand has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:29,839 INFO L93 Difference]: Finished difference Result 455 states and 474 transitions. [2023-11-23 21:28:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:29,839 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2023-11-23 21:28:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:29,848 INFO L225 Difference]: With dead ends: 455 [2023-11-23 21:28:29,848 INFO L226 Difference]: Without dead ends: 421 [2023-11-23 21:28:29,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:29,849 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 143 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:29,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 319 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 21:28:29,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2023-11-23 21:28:29,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 402. [2023-11-23 21:28:29,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 252 states have (on average 1.5952380952380953) internal successors, (402), 382 states have internal predecessors, (402), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:28:29,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 438 transitions. [2023-11-23 21:28:29,866 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 438 transitions. Word has length 43 [2023-11-23 21:28:29,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:29,867 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 438 transitions. [2023-11-23 21:28:29,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 11.666666666666666) internal successors, (35), 4 states have internal predecessors, (35), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-23 21:28:29,867 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 438 transitions. [2023-11-23 21:28:29,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 21:28:29,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:29,868 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:29,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:30,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-23 21:28:30,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr58ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:30,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:30,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1471086087, now seen corresponding path program 1 times [2023-11-23 21:28:30,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:30,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437151441] [2023-11-23 21:28:30,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:30,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:30,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:30,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136924969] [2023-11-23 21:28:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:30,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:30,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:30,123 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:30,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-23 21:28:30,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:30,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:28:30,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:30,418 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-23 21:28:30,418 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:30,419 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:30,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437151441] [2023-11-23 21:28:30,419 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:30,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136924969] [2023-11-23 21:28:30,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136924969] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:30,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:30,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:30,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841475821] [2023-11-23 21:28:30,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:30,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:30,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:30,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:30,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:30,423 INFO L87 Difference]: Start difference. First operand 402 states and 438 transitions. Second operand has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:28:30,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:30,494 INFO L93 Difference]: Finished difference Result 402 states and 438 transitions. [2023-11-23 21:28:30,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:30,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 72 [2023-11-23 21:28:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:30,499 INFO L225 Difference]: With dead ends: 402 [2023-11-23 21:28:30,499 INFO L226 Difference]: Without dead ends: 398 [2023-11-23 21:28:30,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:30,501 INFO L413 NwaCegarLoop]: 249 mSDtfsCounter, 215 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:30,502 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 259 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:28:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-23 21:28:30,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2023-11-23 21:28:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 252 states have (on average 1.5634920634920635) internal successors, (394), 378 states have internal predecessors, (394), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:28:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 430 transitions. [2023-11-23 21:28:30,521 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 430 transitions. Word has length 72 [2023-11-23 21:28:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:30,522 INFO L495 AbstractCegarLoop]: Abstraction has 398 states and 430 transitions. [2023-11-23 21:28:30,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 27.5) internal successors, (55), 3 states have internal predecessors, (55), 1 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-23 21:28:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 430 transitions. [2023-11-23 21:28:30,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-23 21:28:30,525 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:30,525 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:30,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:30,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-23 21:28:30,742 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr52ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:30,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:30,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1807716347, now seen corresponding path program 1 times [2023-11-23 21:28:30,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:30,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882804174] [2023-11-23 21:28:30,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:30,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:30,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:30,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583444665] [2023-11-23 21:28:30,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:30,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:30,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:30,757 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:30,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:28:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:30,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:28:30,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:30,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:28:30,873 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:30,873 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882804174] [2023-11-23 21:28:30,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:30,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583444665] [2023-11-23 21:28:30,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583444665] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:30,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:30,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:30,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445171346] [2023-11-23 21:28:30,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:30,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:30,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:30,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:30,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:30,876 INFO L87 Difference]: Start difference. First operand 398 states and 430 transitions. Second operand has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:28:31,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:31,524 INFO L93 Difference]: Finished difference Result 398 states and 430 transitions. [2023-11-23 21:28:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:31,525 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 71 [2023-11-23 21:28:31,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:31,528 INFO L225 Difference]: With dead ends: 398 [2023-11-23 21:28:31,528 INFO L226 Difference]: Without dead ends: 394 [2023-11-23 21:28:31,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:31,529 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 237 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:31,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [245 Valid, 140 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 21:28:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2023-11-23 21:28:31,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2023-11-23 21:28:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 252 states have (on average 1.5476190476190477) internal successors, (390), 374 states have internal predecessors, (390), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:28:31,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 426 transitions. [2023-11-23 21:28:31,547 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 426 transitions. Word has length 71 [2023-11-23 21:28:31,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:31,547 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 426 transitions. [2023-11-23 21:28:31,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 28.5) internal successors, (57), 3 states have internal predecessors, (57), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:28:31,548 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 426 transitions. [2023-11-23 21:28:31,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-11-23 21:28:31,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:31,549 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:31,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:31,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-23 21:28:31,764 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr53ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:31,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:31,764 INFO L85 PathProgramCache]: Analyzing trace with hash 204632075, now seen corresponding path program 1 times [2023-11-23 21:28:31,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:31,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462358188] [2023-11-23 21:28:31,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:31,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:31,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:31,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041973522] [2023-11-23 21:28:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:31,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:31,792 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:31,793 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:31,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-23 21:28:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:31,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-23 21:28:31,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:28:31,905 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:31,906 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462358188] [2023-11-23 21:28:31,906 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:31,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041973522] [2023-11-23 21:28:31,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041973522] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:31,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:31,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:28:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096859841] [2023-11-23 21:28:31,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:31,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:31,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:31,909 INFO L87 Difference]: Start difference. First operand 394 states and 426 transitions. Second operand has 3 states, 2 states have (on average 29.0) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:28:32,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:32,396 INFO L93 Difference]: Finished difference Result 394 states and 426 transitions. [2023-11-23 21:28:32,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:32,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 29.0) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 72 [2023-11-23 21:28:32,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:32,400 INFO L225 Difference]: With dead ends: 394 [2023-11-23 21:28:32,400 INFO L226 Difference]: Without dead ends: 391 [2023-11-23 21:28:32,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:32,401 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 209 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:32,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 191 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:28:32,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-23 21:28:32,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2023-11-23 21:28:32,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 252 states have (on average 1.5357142857142858) internal successors, (387), 371 states have internal predecessors, (387), 18 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2023-11-23 21:28:32,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 423 transitions. [2023-11-23 21:28:32,419 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 423 transitions. Word has length 72 [2023-11-23 21:28:32,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:32,419 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 423 transitions. [2023-11-23 21:28:32,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 29.0) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:28:32,420 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 423 transitions. [2023-11-23 21:28:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:28:32,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:32,421 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:32,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:32,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-23 21:28:32,636 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr60ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:32,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:32,636 INFO L85 PathProgramCache]: Analyzing trace with hash -669483397, now seen corresponding path program 1 times [2023-11-23 21:28:32,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:32,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309041098] [2023-11-23 21:28:32,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:32,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:32,656 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:32,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51677938] [2023-11-23 21:28:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:32,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:32,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:32,659 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:32,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-23 21:28:32,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:32,721 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:28:32,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:28:33,019 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:33,019 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309041098] [2023-11-23 21:28:33,020 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:33,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51677938] [2023-11-23 21:28:33,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51677938] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:33,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:33,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:33,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428511034] [2023-11-23 21:28:33,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:33,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:28:33,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:33,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:28:33,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:33,023 INFO L87 Difference]: Start difference. First operand 391 states and 423 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:28:33,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:33,148 INFO L93 Difference]: Finished difference Result 408 states and 424 transitions. [2023-11-23 21:28:33,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:28:33,149 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 74 [2023-11-23 21:28:33,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:33,151 INFO L225 Difference]: With dead ends: 408 [2023-11-23 21:28:33,151 INFO L226 Difference]: Without dead ends: 332 [2023-11-23 21:28:33,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:28:33,153 INFO L413 NwaCegarLoop]: 259 mSDtfsCounter, 2 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:33,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 457 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:28:33,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2023-11-23 21:28:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2023-11-23 21:28:33,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 196 states have (on average 1.6122448979591837) internal successors, (316), 315 states have internal predecessors, (316), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:28:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 346 transitions. [2023-11-23 21:28:33,168 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 346 transitions. Word has length 74 [2023-11-23 21:28:33,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:33,169 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 346 transitions. [2023-11-23 21:28:33,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-11-23 21:28:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 346 transitions. [2023-11-23 21:28:33,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-11-23 21:28:33,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:33,170 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:33,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:33,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:33,388 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:33,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:33,390 INFO L85 PathProgramCache]: Analyzing trace with hash -917070003, now seen corresponding path program 1 times [2023-11-23 21:28:33,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:33,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474225810] [2023-11-23 21:28:33,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:33,406 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:33,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929743742] [2023-11-23 21:28:33,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:33,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:33,408 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:33,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:28:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:33,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:28:33,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:28:33,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:28:33,549 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474225810] [2023-11-23 21:28:33,549 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:33,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929743742] [2023-11-23 21:28:33,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929743742] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:33,550 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:28:33,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:28:33,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412216557] [2023-11-23 21:28:33,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:33,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:28:33,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:33,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:28:33,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:33,552 INFO L87 Difference]: Start difference. First operand 332 states and 346 transitions. Second operand has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 21:28:33,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:28:33,658 INFO L93 Difference]: Finished difference Result 332 states and 346 transitions. [2023-11-23 21:28:33,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:28:33,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 74 [2023-11-23 21:28:33,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:28:33,662 INFO L225 Difference]: With dead ends: 332 [2023-11-23 21:28:33,662 INFO L226 Difference]: Without dead ends: 324 [2023-11-23 21:28:33,663 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:28:33,664 INFO L413 NwaCegarLoop]: 273 mSDtfsCounter, 244 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:28:33,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 332 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:28:33,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-23 21:28:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 324. [2023-11-23 21:28:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 196 states have (on average 1.5714285714285714) internal successors, (308), 307 states have internal predecessors, (308), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-23 21:28:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 338 transitions. [2023-11-23 21:28:33,679 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 338 transitions. Word has length 74 [2023-11-23 21:28:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:28:33,679 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 338 transitions. [2023-11-23 21:28:33,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 20.0) internal successors, (60), 4 states have internal predecessors, (60), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-23 21:28:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 338 transitions. [2023-11-23 21:28:33,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-23 21:28:33,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:28:33,681 INFO L195 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:28:33,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:28:33,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:33,902 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 135 more)] === [2023-11-23 21:28:33,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:28:33,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1635601031, now seen corresponding path program 1 times [2023-11-23 21:28:33,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:28:33,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198392920] [2023-11-23 21:28:33,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:28:33,914 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-23 21:28:33,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [569474694] [2023-11-23 21:28:33,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:28:33,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:28:33,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:28:33,916 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:28:33,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e70fd8ad-aaca-4f43-970c-c6728b13da50/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-23 21:28:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:28:33,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-23 21:28:33,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:28:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:28:34,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:28:34,209 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-23 21:28:34,209 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:28:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198392920] [2023-11-23 21:28:34,210 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-23 21:28:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569474694] [2023-11-23 21:28:34,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569474694] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:28:34,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1655933469] [2023-11-23 21:28:34,238 INFO L159 IcfgInterpreter]: Started Sifa with 65 locations of interest [2023-11-23 21:28:34,238 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:28:34,245 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:28:34,252 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:28:34,252 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:28:39,422 INFO L197 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 3 for LOIs [2023-11-23 21:28:39,423 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:28:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1655933469] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:28:45,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-23 21:28:45,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [3, 3] total 23 [2023-11-23 21:28:45,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797139147] [2023-11-23 21:28:45,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:28:45,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-23 21:28:45,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:28:45,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-23 21:28:45,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2023-11-23 21:28:45,286 INFO L87 Difference]: Start difference. First operand 324 states and 338 transitions. Second operand has 20 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 5 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-23 21:28:50,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:28:52,799 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:28:55,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.42s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:28:58,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:29:00,713 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.33s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:29:02,793 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:29:04,890 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:29:07,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-23 21:29:11,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.14s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []