./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/recursive/MultCommutative-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 2329fc70 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_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/MultCommutative-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh --witnessprinter.witness.filename witness.graphml --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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-14 05:28:39,277 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 05:28:39,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 05:28:39,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 05:28:39,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 05:28:39,298 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 05:28:39,299 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 05:28:39,301 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 05:28:39,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 05:28:39,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 05:28:39,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 05:28:39,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 05:28:39,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 05:28:39,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 05:28:39,308 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 05:28:39,309 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 05:28:39,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 05:28:39,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 05:28:39,312 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 05:28:39,314 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 05:28:39,315 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 05:28:39,316 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 05:28:39,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 05:28:39,318 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 05:28:39,322 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 05:28:39,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 05:28:39,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 05:28:39,323 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 05:28:39,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 05:28:39,324 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 05:28:39,325 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 05:28:39,325 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 05:28:39,326 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 05:28:39,327 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 05:28:39,328 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 05:28:39,328 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 05:28:39,329 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 05:28:39,329 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 05:28:39,329 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 05:28:39,330 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 05:28:39,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 05:28:39,331 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/config/svcomp-Overflow-32bit-Taipan_Default.epf [2022-12-14 05:28:39,352 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 05:28:39,352 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 05:28:39,352 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 05:28:39,352 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 05:28:39,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 05:28:39,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 05:28:39,353 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 05:28:39,354 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 05:28:39,354 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 05:28:39,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 05:28:39,354 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 05:28:39,354 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 05:28:39,355 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 05:28:39,355 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 05:28:39,355 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 05:28:39,355 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 05:28:39,355 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 05:28:39,355 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 05:28:39,356 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 05:28:39,356 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 05:28:39,357 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-12-14 05:28:39,357 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 05:28:39,357 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 05:28:39,357 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 05:28:39,357 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 05:28:39,357 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 05:28:39,358 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 05:28:39,358 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-12-14 05:28:39,358 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 05:28:39,358 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 05:28:39,358 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 05:28:39,358 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 05:28:39,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 05:28:39,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 05:28:39,359 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:28:39,359 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 05:28:39,359 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 05:28:39,360 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2022-12-14 05:28:39,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 05:28:39,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 05:28:39,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 05:28:39,557 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 05:28:39,557 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 05:28:39,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/recursive/MultCommutative-2.c [2022-12-14 05:28:42,178 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 05:28:42,328 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 05:28:42,329 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/sv-benchmarks/c/recursive/MultCommutative-2.c [2022-12-14 05:28:42,334 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/data/531156163/f3dd286aefb4498fb1ab6a0a64e55d65/FLAG3d2693a16 [2022-12-14 05:28:42,346 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/data/531156163/f3dd286aefb4498fb1ab6a0a64e55d65 [2022-12-14 05:28:42,348 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 05:28:42,349 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 05:28:42,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 05:28:42,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 05:28:42,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 05:28:42,353 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@52f35e54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42, skipping insertion in model container [2022-12-14 05:28:42,354 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 05:28:42,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 05:28:42,476 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2022-12-14 05:28:42,477 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:28:42,484 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 05:28:42,496 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/sv-benchmarks/c/recursive/MultCommutative-2.c[970,983] [2022-12-14 05:28:42,496 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 05:28:42,506 INFO L208 MainTranslator]: Completed translation [2022-12-14 05:28:42,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42 WrapperNode [2022-12-14 05:28:42,506 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 05:28:42,507 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 05:28:42,507 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 05:28:42,507 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 05:28:42,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,517 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,528 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-12-14 05:28:42,529 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 05:28:42,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 05:28:42,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 05:28:42,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 05:28:42,536 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,537 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,537 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,539 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,541 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,541 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,542 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,543 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 05:28:42,543 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 05:28:42,544 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 05:28:42,544 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 05:28:42,544 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (1/1) ... [2022-12-14 05:28:42,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 05:28:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:42,570 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 05:28:42,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 05:28:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 05:28:42,599 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-12-14 05:28:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-12-14 05:28:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 05:28:42,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 05:28:42,600 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 05:28:42,656 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 05:28:42,658 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 05:28:42,792 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 05:28:42,811 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 05:28:42,811 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 05:28:42,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:28:42 BoogieIcfgContainer [2022-12-14 05:28:42,813 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 05:28:42,815 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 05:28:42,815 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 05:28:42,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 05:28:42,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 05:28:42" (1/3) ... [2022-12-14 05:28:42,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283fb3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:28:42, skipping insertion in model container [2022-12-14 05:28:42,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 05:28:42" (2/3) ... [2022-12-14 05:28:42,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@283fb3aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 05:28:42, skipping insertion in model container [2022-12-14 05:28:42,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 05:28:42" (3/3) ... [2022-12-14 05:28:42,819 INFO L112 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2022-12-14 05:28:42,832 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 05:28:42,833 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2022-12-14 05:28:42,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 05:28:42,875 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=LoopsAndPotentialCycles, 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;@b32bce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 05:28:42,875 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-14 05:28:42,878 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 05:28:42,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-12-14 05:28:42,883 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:42,883 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:42,884 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:42,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1027513993, now seen corresponding path program 1 times [2022-12-14 05:28:42,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:42,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260357745] [2022-12-14 05:28:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:42,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:42,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260357745] [2022-12-14 05:28:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260357745] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:43,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:43,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 05:28:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805481710] [2022-12-14 05:28:43,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:43,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 05:28:43,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:43,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 05:28:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:28:43,049 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,096 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2022-12-14 05:28:43,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 05:28:43,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-12-14 05:28:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,104 INFO L225 Difference]: With dead ends: 32 [2022-12-14 05:28:43,105 INFO L226 Difference]: Without dead ends: 28 [2022-12-14 05:28:43,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 05:28:43,109 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 50 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:28:43,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-12-14 05:28:43,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2022-12-14 05:28:43,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-12-14 05:28:43,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-12-14 05:28:43,136 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 7 [2022-12-14 05:28:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,137 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-12-14 05:28:43,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,137 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-12-14 05:28:43,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-12-14 05:28:43,137 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,137 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 05:28:43,138 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:43,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1788162748, now seen corresponding path program 1 times [2022-12-14 05:28:43,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:43,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381425919] [2022-12-14 05:28:43,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,196 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381425919] [2022-12-14 05:28:43,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381425919] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:43,197 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:43,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:28:43,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966834550] [2022-12-14 05:28:43,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:43,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:43,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:43,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:43,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:43,199 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,276 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-12-14 05:28:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:28:43,277 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-12-14 05:28:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,278 INFO L225 Difference]: With dead ends: 63 [2022-12-14 05:28:43,278 INFO L226 Difference]: Without dead ends: 41 [2022-12-14 05:28:43,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:28:43,280 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 37 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,280 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-12-14 05:28:43,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2022-12-14 05:28:43,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.4) internal successors, (35), 29 states have internal predecessors, (35), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-14 05:28:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2022-12-14 05:28:43,289 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 8 [2022-12-14 05:28:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,289 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2022-12-14 05:28:43,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,290 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2022-12-14 05:28:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-12-14 05:28:43,290 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,290 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 05:28:43,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:43,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,292 INFO L85 PathProgramCache]: Analyzing trace with hash -401312147, now seen corresponding path program 1 times [2022-12-14 05:28:43,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:43,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298197720] [2022-12-14 05:28:43,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,353 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298197720] [2022-12-14 05:28:43,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298197720] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:43,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:43,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:28:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346881362] [2022-12-14 05:28:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:43,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:43,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:43,356 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,425 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-12-14 05:28:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:28:43,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-12-14 05:28:43,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,427 INFO L225 Difference]: With dead ends: 57 [2022-12-14 05:28:43,427 INFO L226 Difference]: Without dead ends: 56 [2022-12-14 05:28:43,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:28:43,429 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 51 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:43,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-12-14 05:28:43,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2022-12-14 05:28:43,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 41 states have internal predecessors, (51), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-12-14 05:28:43,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2022-12-14 05:28:43,439 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 9 [2022-12-14 05:28:43,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,440 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2022-12-14 05:28:43,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,440 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2022-12-14 05:28:43,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-12-14 05:28:43,441 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,441 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 05:28:43,441 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:43,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,442 INFO L85 PathProgramCache]: Analyzing trace with hash 520189677, now seen corresponding path program 1 times [2022-12-14 05:28:43,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:43,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330497409] [2022-12-14 05:28:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:43,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,509 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330497409] [2022-12-14 05:28:43,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330497409] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:43,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:43,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:28:43,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269166098] [2022-12-14 05:28:43,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:43,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:43,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:43,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:43,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:43,511 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,574 INFO L93 Difference]: Finished difference Result 76 states and 96 transitions. [2022-12-14 05:28:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:28:43,574 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-12-14 05:28:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,575 INFO L225 Difference]: With dead ends: 76 [2022-12-14 05:28:43,576 INFO L226 Difference]: Without dead ends: 75 [2022-12-14 05:28:43,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:28:43,577 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 37 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 51 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:28:43,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-12-14 05:28:43,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2022-12-14 05:28:43,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 53 states have internal predecessors, (67), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-12-14 05:28:43,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2022-12-14 05:28:43,590 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 14 [2022-12-14 05:28:43,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,590 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2022-12-14 05:28:43,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:43,591 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2022-12-14 05:28:43,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-12-14 05:28:43,591 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,591 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-14 05:28:43,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:43,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,592 INFO L85 PathProgramCache]: Analyzing trace with hash 24257123, now seen corresponding path program 1 times [2022-12-14 05:28:43,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:43,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118853701] [2022-12-14 05:28:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:43,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,650 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118853701] [2022-12-14 05:28:43,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118853701] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:43,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:43,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:28:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90351916] [2022-12-14 05:28:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:43,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:43,653 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:43,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,708 INFO L93 Difference]: Finished difference Result 120 states and 154 transitions. [2022-12-14 05:28:43,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:28:43,708 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-12-14 05:28:43,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,710 INFO L225 Difference]: With dead ends: 120 [2022-12-14 05:28:43,710 INFO L226 Difference]: Without dead ends: 84 [2022-12-14 05:28:43,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:28:43,712 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 70 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:28:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-12-14 05:28:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 75. [2022-12-14 05:28:43,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 60 states have internal predecessors, (77), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-12-14 05:28:43,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 96 transitions. [2022-12-14 05:28:43,724 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 96 transitions. Word has length 15 [2022-12-14 05:28:43,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,725 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 96 transitions. [2022-12-14 05:28:43,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:43,725 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 96 transitions. [2022-12-14 05:28:43,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-12-14 05:28:43,726 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,726 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-14 05:28:43,726 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting multErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:43,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,727 INFO L85 PathProgramCache]: Analyzing trace with hash 752188326, now seen corresponding path program 1 times [2022-12-14 05:28:43,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:43,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962467382] [2022-12-14 05:28:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962467382] [2022-12-14 05:28:43,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962467382] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:43,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:43,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-12-14 05:28:43,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431159352] [2022-12-14 05:28:43,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:43,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:43,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:43,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:43,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:43,776 INFO L87 Difference]: Start difference. First operand 75 states and 96 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:43,831 INFO L93 Difference]: Finished difference Result 101 states and 130 transitions. [2022-12-14 05:28:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-14 05:28:43,832 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-12-14 05:28:43,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:43,833 INFO L225 Difference]: With dead ends: 101 [2022-12-14 05:28:43,833 INFO L226 Difference]: Without dead ends: 100 [2022-12-14 05:28:43,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-12-14 05:28:43,834 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:43,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:28:43,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-12-14 05:28:43,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 90. [2022-12-14 05:28:43,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 72 states have internal predecessors, (92), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-12-14 05:28:43,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2022-12-14 05:28:43,847 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 16 [2022-12-14 05:28:43,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:43,847 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2022-12-14 05:28:43,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-14 05:28:43,847 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2022-12-14 05:28:43,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-12-14 05:28:43,848 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:43,848 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-14 05:28:43,848 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:43,848 INFO L85 PathProgramCache]: Analyzing trace with hash 937076250, now seen corresponding path program 1 times [2022-12-14 05:28:43,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:43,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249492724] [2022-12-14 05:28:43,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:43,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:43,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:43,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249492724] [2022-12-14 05:28:43,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249492724] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:43,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369400245] [2022-12-14 05:28:43,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:43,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:43,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:43,930 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:43,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-14 05:28:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:43,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:28:43,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:44,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:44,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369400245] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:44,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [627737870] [2022-12-14 05:28:44,103 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2022-12-14 05:28:44,103 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:44,107 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:44,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:44,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-12-14 05:28:44,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12547013] [2022-12-14 05:28:44,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:44,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:28:44,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:44,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:28:44,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:28:44,110 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:28:44,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:44,207 INFO L93 Difference]: Finished difference Result 151 states and 200 transitions. [2022-12-14 05:28:44,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:28:44,208 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-12-14 05:28:44,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:44,209 INFO L225 Difference]: With dead ends: 151 [2022-12-14 05:28:44,209 INFO L226 Difference]: Without dead ends: 150 [2022-12-14 05:28:44,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:28:44,211 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:44,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 105 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-12-14 05:28:44,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2022-12-14 05:28:44,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 93 states have (on average 1.3225806451612903) internal successors, (123), 96 states have internal predecessors, (123), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-12-14 05:28:44,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 154 transitions. [2022-12-14 05:28:44,227 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 154 transitions. Word has length 17 [2022-12-14 05:28:44,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:44,228 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 154 transitions. [2022-12-14 05:28:44,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-14 05:28:44,228 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 154 transitions. [2022-12-14 05:28:44,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-14 05:28:44,229 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:44,229 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:44,234 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-14 05:28:44,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:44,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:44,430 INFO L85 PathProgramCache]: Analyzing trace with hash 243570539, now seen corresponding path program 1 times [2022-12-14 05:28:44,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:44,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997049974] [2022-12-14 05:28:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:44,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:44,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:44,467 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-12-14 05:28:44,467 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997049974] [2022-12-14 05:28:44,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997049974] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 05:28:44,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 05:28:44,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-12-14 05:28:44,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371459991] [2022-12-14 05:28:44,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 05:28:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-12-14 05:28:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-12-14 05:28:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-12-14 05:28:44,469 INFO L87 Difference]: Start difference. First operand 120 states and 154 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:44,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:44,510 INFO L93 Difference]: Finished difference Result 162 states and 205 transitions. [2022-12-14 05:28:44,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-14 05:28:44,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-12-14 05:28:44,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:44,511 INFO L225 Difference]: With dead ends: 162 [2022-12-14 05:28:44,511 INFO L226 Difference]: Without dead ends: 58 [2022-12-14 05:28:44,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-12-14 05:28:44,514 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 20 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:44,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 54 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:28:44,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-12-14 05:28:44,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-12-14 05:28:44,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 39 states have (on average 1.205128205128205) internal successors, (47), 40 states have internal predecessors, (47), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-12-14 05:28:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2022-12-14 05:28:44,522 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 19 [2022-12-14 05:28:44,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:44,522 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2022-12-14 05:28:44,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 05:28:44,523 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2022-12-14 05:28:44,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-12-14 05:28:44,523 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:44,524 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:44,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-14 05:28:44,524 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:44,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:44,524 INFO L85 PathProgramCache]: Analyzing trace with hash -1015407268, now seen corresponding path program 1 times [2022-12-14 05:28:44,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:44,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755956576] [2022-12-14 05:28:44,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:44,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:44,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:44,589 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:44,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755956576] [2022-12-14 05:28:44,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755956576] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:44,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766986614] [2022-12-14 05:28:44,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:44,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:44,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:44,591 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:44,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-14 05:28:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-14 05:28:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:44,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:44,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:44,732 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 05:28:44,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766986614] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:44,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1025620295] [2022-12-14 05:28:44,735 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:28:44,735 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:44,735 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:44,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:44,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-12-14 05:28:44,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622702397] [2022-12-14 05:28:44,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:44,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-12-14 05:28:44,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:44,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-12-14 05:28:44,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:28:44,736 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 05:28:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:44,823 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-12-14 05:28:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:28:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 18 [2022-12-14 05:28:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:44,824 INFO L225 Difference]: With dead ends: 64 [2022-12-14 05:28:44,824 INFO L226 Difference]: Without dead ends: 63 [2022-12-14 05:28:44,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2022-12-14 05:28:44,825 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:44,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 72 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-14 05:28:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2022-12-14 05:28:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:28:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-12-14 05:28:44,831 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 18 [2022-12-14 05:28:44,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:44,831 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-12-14 05:28:44,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 05:28:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-12-14 05:28:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-12-14 05:28:44,832 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:44,832 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:44,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-14 05:28:45,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:45,032 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting multErr4ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:45,033 INFO L85 PathProgramCache]: Analyzing trace with hash -2063375789, now seen corresponding path program 1 times [2022-12-14 05:28:45,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:45,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139262690] [2022-12-14 05:28:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:45,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:28:45,107 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139262690] [2022-12-14 05:28:45,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139262690] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646151801] [2022-12-14 05:28:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:45,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:45,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:45,109 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:45,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-14 05:28:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:45,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2022-12-14 05:28:45,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:45,182 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:28:45,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:45,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:28:45,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646151801] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:45,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1132415519] [2022-12-14 05:28:45,220 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2022-12-14 05:28:45,220 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:45,221 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:45,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:45,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-12-14 05:28:45,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697580425] [2022-12-14 05:28:45,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:45,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-12-14 05:28:45,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:45,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-12-14 05:28:45,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-12-14 05:28:45,222 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 05:28:45,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:45,293 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2022-12-14 05:28:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:28:45,293 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-12-14 05:28:45,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:45,294 INFO L225 Difference]: With dead ends: 70 [2022-12-14 05:28:45,294 INFO L226 Difference]: Without dead ends: 69 [2022-12-14 05:28:45,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-12-14 05:28:45,295 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:45,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 105 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 05:28:45,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-12-14 05:28:45,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 57. [2022-12-14 05:28:45,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:28:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2022-12-14 05:28:45,301 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 24 [2022-12-14 05:28:45,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:45,302 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2022-12-14 05:28:45,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 05:28:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2022-12-14 05:28:45,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-14 05:28:45,302 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:45,303 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:45,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-14 05:28:45,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-14 05:28:45,503 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:45,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:45,504 INFO L85 PathProgramCache]: Analyzing trace with hash 459860035, now seen corresponding path program 1 times [2022-12-14 05:28:45,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:45,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047032670] [2022-12-14 05:28:45,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:45,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:45,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:45,676 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:28:45,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047032670] [2022-12-14 05:28:45,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047032670] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:45,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818783764] [2022-12-14 05:28:45,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:45,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:45,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:45,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:45,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-14 05:28:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-12-14 05:28:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:45,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:28:45,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:45,823 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:28:45,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818783764] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:45,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1940535421] [2022-12-14 05:28:45,825 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:28:45,825 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:45,826 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:45,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:45,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 11 [2022-12-14 05:28:45,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221665243] [2022-12-14 05:28:45,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:45,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-14 05:28:45,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:45,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-14 05:28:45,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-12-14 05:28:45,827 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 05:28:45,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:45,951 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2022-12-14 05:28:45,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-12-14 05:28:45,952 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2022-12-14 05:28:45,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:45,952 INFO L225 Difference]: With dead ends: 92 [2022-12-14 05:28:45,952 INFO L226 Difference]: Without dead ends: 59 [2022-12-14 05:28:45,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 43 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2022-12-14 05:28:45,953 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:45,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 70 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:45,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-12-14 05:28:45,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2022-12-14 05:28:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.108695652173913) internal successors, (51), 45 states have internal predecessors, (51), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:28:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2022-12-14 05:28:45,957 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 25 [2022-12-14 05:28:45,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:45,957 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2022-12-14 05:28:45,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 3 states have call successors, (3), 2 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2022-12-14 05:28:45,957 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2022-12-14 05:28:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-12-14 05:28:45,957 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:45,957 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:45,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-14 05:28:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:46,159 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -949258584, now seen corresponding path program 1 times [2022-12-14 05:28:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:46,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634896827] [2022-12-14 05:28:46,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:46,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:46,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:46,350 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:28:46,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634896827] [2022-12-14 05:28:46,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634896827] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:46,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090633019] [2022-12-14 05:28:46,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:46,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:46,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:46,351 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:46,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-12-14 05:28:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:28:46,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:46,458 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:28:46,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:46,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-14 05:28:46,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090633019] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:46,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1506468899] [2022-12-14 05:28:46,639 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:28:46,639 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:46,639 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:46,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:46,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-14 05:28:46,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658777408] [2022-12-14 05:28:46,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:46,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:28:46,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:46,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:28:46,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:28:46,641 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 05:28:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:46,855 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2022-12-14 05:28:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-12-14 05:28:46,856 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 29 [2022-12-14 05:28:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:46,857 INFO L225 Difference]: With dead ends: 90 [2022-12-14 05:28:46,857 INFO L226 Difference]: Without dead ends: 89 [2022-12-14 05:28:46,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=703, Unknown=0, NotChecked=0, Total=870 [2022-12-14 05:28:46,858 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:46,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 105 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-12-14 05:28:46,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 67. [2022-12-14 05:28:46,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 54 states have (on average 1.0925925925925926) internal successors, (59), 53 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (11), 9 states have call predecessors, (11), 5 states have call successors, (11) [2022-12-14 05:28:46,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2022-12-14 05:28:46,864 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 29 [2022-12-14 05:28:46,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:46,865 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2022-12-14 05:28:46,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 18 states have internal predecessors, (51), 6 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2022-12-14 05:28:46,865 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2022-12-14 05:28:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-12-14 05:28:46,866 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:46,866 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:46,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-12-14 05:28:47,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-12-14 05:28:47,067 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:47,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1169132981, now seen corresponding path program 1 times [2022-12-14 05:28:47,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:47,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318584797] [2022-12-14 05:28:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:47,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:47,265 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:28:47,265 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318584797] [2022-12-14 05:28:47,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318584797] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:47,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138351818] [2022-12-14 05:28:47,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:47,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:47,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:47,267 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:47,267 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-12-14 05:28:47,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:47,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:28:47,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 23 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-12-14 05:28:47,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:47,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-14 05:28:47,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138351818] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:47,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598595611] [2022-12-14 05:28:47,524 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:28:47,524 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:47,525 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:47,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:47,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 10] total 18 [2022-12-14 05:28:47,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360839546] [2022-12-14 05:28:47,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:47,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-12-14 05:28:47,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-12-14 05:28:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-12-14 05:28:47,527 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:28:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:47,813 INFO L93 Difference]: Finished difference Result 136 states and 152 transitions. [2022-12-14 05:28:47,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-12-14 05:28:47,813 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 36 [2022-12-14 05:28:47,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:47,815 INFO L225 Difference]: With dead ends: 136 [2022-12-14 05:28:47,815 INFO L226 Difference]: Without dead ends: 129 [2022-12-14 05:28:47,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-12-14 05:28:47,816 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:47,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 81 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-12-14 05:28:47,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 72. [2022-12-14 05:28:47,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 58 states have (on average 1.0862068965517242) internal successors, (63), 57 states have internal predecessors, (63), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (12), 10 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 05:28:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-12-14 05:28:47,823 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 36 [2022-12-14 05:28:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:47,824 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-12-14 05:28:47,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 7 states have call successors, (7), 3 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-12-14 05:28:47,824 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-12-14 05:28:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-12-14 05:28:47,825 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:47,825 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:47,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-12-14 05:28:48,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-12-14 05:28:48,026 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:48,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:48,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1564283418, now seen corresponding path program 2 times [2022-12-14 05:28:48,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:48,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611861619] [2022-12-14 05:28:48,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:48,216 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:28:48,216 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:48,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611861619] [2022-12-14 05:28:48,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611861619] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:48,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181712411] [2022-12-14 05:28:48,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:28:48,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:48,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:48,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-12-14 05:28:48,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 05:28:48,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:28:48,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2022-12-14 05:28:48,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:48,400 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-12-14 05:28:48,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:48,978 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 57 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-14 05:28:48,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181712411] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:48,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [845463350] [2022-12-14 05:28:48,980 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:28:48,980 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:48,980 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:48,981 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:48,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 14] total 30 [2022-12-14 05:28:48,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675394980] [2022-12-14 05:28:48,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:48,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-12-14 05:28:48,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:48,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-12-14 05:28:48,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-12-14 05:28:48,983 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 31 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (12), 12 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 05:28:49,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:49,488 INFO L93 Difference]: Finished difference Result 144 states and 166 transitions. [2022-12-14 05:28:49,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-12-14 05:28:49,488 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (12), 12 states have call predecessors, (12), 5 states have call successors, (12) Word has length 51 [2022-12-14 05:28:49,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:49,490 INFO L225 Difference]: With dead ends: 144 [2022-12-14 05:28:49,490 INFO L226 Difference]: Without dead ends: 143 [2022-12-14 05:28:49,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=430, Invalid=2222, Unknown=0, NotChecked=0, Total=2652 [2022-12-14 05:28:49,491 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:49,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 142 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-14 05:28:49,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-12-14 05:28:49,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 92. [2022-12-14 05:28:49,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 73 states have internal predecessors, (79), 6 states have call successors, (6), 4 states have call predecessors, (6), 11 states have return successors, (20), 14 states have call predecessors, (20), 5 states have call successors, (20) [2022-12-14 05:28:49,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 105 transitions. [2022-12-14 05:28:49,498 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 105 transitions. Word has length 51 [2022-12-14 05:28:49,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:49,498 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 105 transitions. [2022-12-14 05:28:49,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (12), 12 states have call predecessors, (12), 5 states have call successors, (12) [2022-12-14 05:28:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 105 transitions. [2022-12-14 05:28:49,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-12-14 05:28:49,499 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:49,500 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:49,505 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-12-14 05:28:49,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:49,702 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:49,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:49,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1489861457, now seen corresponding path program 2 times [2022-12-14 05:28:49,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:49,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47426928] [2022-12-14 05:28:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:28:49,818 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:49,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47426928] [2022-12-14 05:28:49,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47426928] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:49,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789640531] [2022-12-14 05:28:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:28:49,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:49,820 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:49,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-12-14 05:28:49,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-14 05:28:49,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:28:49,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2022-12-14 05:28:49,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:28:49,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:50,090 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 30 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-12-14 05:28:50,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789640531] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:50,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1473366328] [2022-12-14 05:28:50,093 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:28:50,093 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:50,093 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:50,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:50,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-12-14 05:28:50,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878835913] [2022-12-14 05:28:50,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:50,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-14 05:28:50,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:50,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-14 05:28:50,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-12-14 05:28:50,095 INFO L87 Difference]: Start difference. First operand 92 states and 105 transitions. Second operand has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 05:28:50,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:50,289 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2022-12-14 05:28:50,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-12-14 05:28:50,289 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2022-12-14 05:28:50,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:50,290 INFO L225 Difference]: With dead ends: 115 [2022-12-14 05:28:50,290 INFO L226 Difference]: Without dead ends: 108 [2022-12-14 05:28:50,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2022-12-14 05:28:50,291 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:50,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 158 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 05:28:50,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-12-14 05:28:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2022-12-14 05:28:50,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 82 states have (on average 1.0609756097560976) internal successors, (87), 81 states have internal predecessors, (87), 6 states have call successors, (6), 4 states have call predecessors, (6), 13 states have return successors, (22), 16 states have call predecessors, (22), 5 states have call successors, (22) [2022-12-14 05:28:50,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2022-12-14 05:28:50,295 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 47 [2022-12-14 05:28:50,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:50,295 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2022-12-14 05:28:50,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 7 states have call successors, (9), 3 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-12-14 05:28:50,296 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2022-12-14 05:28:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-12-14 05:28:50,297 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:50,297 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 6, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:50,302 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-12-14 05:28:50,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-12-14 05:28:50,498 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:50,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:50,498 INFO L85 PathProgramCache]: Analyzing trace with hash 154282315, now seen corresponding path program 3 times [2022-12-14 05:28:50,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:50,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096784365] [2022-12-14 05:28:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:50,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:50,725 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 6 proven. 175 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 05:28:50,725 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:50,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096784365] [2022-12-14 05:28:50,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096784365] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:50,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059812668] [2022-12-14 05:28:50,725 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:28:50,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:50,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:50,726 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:50,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-12-14 05:28:50,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:28:50,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:28:50,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 26 conjunts are in the unsatisfiable core [2022-12-14 05:28:50,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 6 proven. 175 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-12-14 05:28:50,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:51,667 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 16 proven. 177 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-12-14 05:28:51,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059812668] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:51,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [428962342] [2022-12-14 05:28:51,669 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:28:51,669 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:51,669 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:51,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:51,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 18] total 36 [2022-12-14 05:28:51,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618959967] [2022-12-14 05:28:51,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:51,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-12-14 05:28:51,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:51,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-12-14 05:28:51,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1183, Unknown=0, NotChecked=0, Total=1332 [2022-12-14 05:28:51,672 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 10 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-14 05:28:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:52,557 INFO L93 Difference]: Finished difference Result 198 states and 220 transitions. [2022-12-14 05:28:52,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-12-14 05:28:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 10 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) Word has length 81 [2022-12-14 05:28:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:52,559 INFO L225 Difference]: With dead ends: 198 [2022-12-14 05:28:52,559 INFO L226 Difference]: Without dead ends: 182 [2022-12-14 05:28:52,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 147 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=805, Invalid=4307, Unknown=0, NotChecked=0, Total=5112 [2022-12-14 05:28:52,561 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 229 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:52,561 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 180 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-14 05:28:52,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-12-14 05:28:52,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 166. [2022-12-14 05:28:52,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 133 states have (on average 1.0526315789473684) internal successors, (140), 132 states have internal predecessors, (140), 9 states have call successors, (9), 6 states have call predecessors, (9), 23 states have return successors, (33), 27 states have call predecessors, (33), 7 states have call successors, (33) [2022-12-14 05:28:52,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 182 transitions. [2022-12-14 05:28:52,570 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 182 transitions. Word has length 81 [2022-12-14 05:28:52,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:52,571 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 182 transitions. [2022-12-14 05:28:52,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.8055555555555554) internal successors, (101), 35 states have internal predecessors, (101), 10 states have call successors, (12), 3 states have call predecessors, (12), 11 states have return successors, (16), 16 states have call predecessors, (16), 8 states have call successors, (16) [2022-12-14 05:28:52,571 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 182 transitions. [2022-12-14 05:28:52,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-12-14 05:28:52,572 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:52,572 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:52,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-12-14 05:28:52,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-12-14 05:28:52,774 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:52,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:52,775 INFO L85 PathProgramCache]: Analyzing trace with hash -336071040, now seen corresponding path program 3 times [2022-12-14 05:28:52,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:52,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910722480] [2022-12-14 05:28:52,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:52,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:53,171 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-12-14 05:28:53,171 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:53,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910722480] [2022-12-14 05:28:53,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910722480] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:53,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963376606] [2022-12-14 05:28:53,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:28:53,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:53,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:53,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:53,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-12-14 05:28:53,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:28:53,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:28:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 38 conjunts are in the unsatisfiable core [2022-12-14 05:28:53,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:53,528 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-12-14 05:28:53,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:56,365 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 30 proven. 289 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-12-14 05:28:56,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963376606] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:56,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267020127] [2022-12-14 05:28:56,367 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:28:56,367 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:56,367 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:56,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:56,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 22] total 50 [2022-12-14 05:28:56,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438830979] [2022-12-14 05:28:56,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:56,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-12-14 05:28:56,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:56,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-12-14 05:28:56,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2248, Unknown=0, NotChecked=0, Total=2550 [2022-12-14 05:28:56,371 INFO L87 Difference]: Start difference. First operand 166 states and 182 transitions. Second operand has 51 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 7 states have call successors, (9), 3 states have call predecessors, (9), 16 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) [2022-12-14 05:28:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:28:57,591 INFO L93 Difference]: Finished difference Result 304 states and 347 transitions. [2022-12-14 05:28:57,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-12-14 05:28:57,592 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 7 states have call successors, (9), 3 states have call predecessors, (9), 16 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) Word has length 107 [2022-12-14 05:28:57,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:28:57,594 INFO L225 Difference]: With dead ends: 304 [2022-12-14 05:28:57,594 INFO L226 Difference]: Without dead ends: 303 [2022-12-14 05:28:57,598 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 186 SyntacticMatches, 9 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2244 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1137, Invalid=7419, Unknown=0, NotChecked=0, Total=8556 [2022-12-14 05:28:57,599 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 349 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 1014 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:28:57,599 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 298 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1014 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:28:57,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-12-14 05:28:57,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 206. [2022-12-14 05:28:57,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 165 states have (on average 1.0424242424242425) internal successors, (172), 164 states have internal predecessors, (172), 9 states have call successors, (9), 6 states have call predecessors, (9), 31 states have return successors, (49), 35 states have call predecessors, (49), 7 states have call successors, (49) [2022-12-14 05:28:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 230 transitions. [2022-12-14 05:28:57,614 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 230 transitions. Word has length 107 [2022-12-14 05:28:57,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:28:57,615 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 230 transitions. [2022-12-14 05:28:57,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.44) internal successors, (122), 49 states have internal predecessors, (122), 7 states have call successors, (9), 3 states have call predecessors, (9), 16 states have return successors, (24), 24 states have call predecessors, (24), 5 states have call successors, (24) [2022-12-14 05:28:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 230 transitions. [2022-12-14 05:28:57,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-12-14 05:28:57,617 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:28:57,617 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 9, 9, 9, 9, 8, 7, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:28:57,622 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-12-14 05:28:57,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-12-14 05:28:57,819 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:28:57,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:28:57,820 INFO L85 PathProgramCache]: Analyzing trace with hash -788241241, now seen corresponding path program 4 times [2022-12-14 05:28:57,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:28:57,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988296714] [2022-12-14 05:28:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:28:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:28:57,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 153 proven. 139 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-12-14 05:28:58,114 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:28:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988296714] [2022-12-14 05:28:58,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988296714] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:28:58,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113374550] [2022-12-14 05:28:58,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:28:58,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:28:58,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:28:58,115 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:28:58,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-12-14 05:28:58,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:28:58,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2022-12-14 05:28:58,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:28:58,454 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 9 proven. 298 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-12-14 05:28:58,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:28:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 14 proven. 327 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-12-14 05:28:59,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113374550] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:28:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [598778699] [2022-12-14 05:28:59,507 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:28:59,507 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:28:59,508 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:28:59,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:28:59,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 23] total 47 [2022-12-14 05:28:59,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263048987] [2022-12-14 05:28:59,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:28:59,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-12-14 05:28:59,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:28:59,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-12-14 05:28:59,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2022-12-14 05:28:59,510 INFO L87 Difference]: Start difference. First operand 206 states and 230 transitions. Second operand has 48 states, 47 states have (on average 3.0) internal successors, (141), 45 states have internal predecessors, (141), 14 states have call successors, (19), 4 states have call predecessors, (19), 15 states have return successors, (23), 22 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 05:29:00,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:00,844 INFO L93 Difference]: Finished difference Result 357 states and 404 transitions. [2022-12-14 05:29:00,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-12-14 05:29:00,845 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 45 states have internal predecessors, (141), 14 states have call successors, (19), 4 states have call predecessors, (19), 15 states have return successors, (23), 22 states have call predecessors, (23), 12 states have call successors, (23) Word has length 103 [2022-12-14 05:29:00,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:00,846 INFO L225 Difference]: With dead ends: 357 [2022-12-14 05:29:00,846 INFO L226 Difference]: Without dead ends: 326 [2022-12-14 05:29:00,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 178 SyntacticMatches, 6 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2372 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1517, Invalid=8185, Unknown=0, NotChecked=0, Total=9702 [2022-12-14 05:29:00,848 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 379 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 1181 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 1394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 1181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:00,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 242 Invalid, 1394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 1181 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-12-14 05:29:00,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-12-14 05:29:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 172. [2022-12-14 05:29:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 138 states have (on average 1.036231884057971) internal successors, (143), 137 states have internal predecessors, (143), 6 states have call successors, (6), 4 states have call predecessors, (6), 27 states have return successors, (44), 30 states have call predecessors, (44), 5 states have call successors, (44) [2022-12-14 05:29:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 193 transitions. [2022-12-14 05:29:00,854 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 193 transitions. Word has length 103 [2022-12-14 05:29:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:00,854 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 193 transitions. [2022-12-14 05:29:00,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 3.0) internal successors, (141), 45 states have internal predecessors, (141), 14 states have call successors, (19), 4 states have call predecessors, (19), 15 states have return successors, (23), 22 states have call predecessors, (23), 12 states have call successors, (23) [2022-12-14 05:29:00,854 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 193 transitions. [2022-12-14 05:29:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-12-14 05:29:00,855 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:00,855 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 13, 13, 13, 13, 12, 11, 11, 11, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:00,861 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-12-14 05:29:01,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-12-14 05:29:01,057 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:29:01,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:01,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1706566085, now seen corresponding path program 5 times [2022-12-14 05:29:01,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:01,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707604370] [2022-12-14 05:29:01,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:01,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:01,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:01,709 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 6 proven. 574 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-12-14 05:29:01,709 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:01,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707604370] [2022-12-14 05:29:01,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707604370] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:01,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564101841] [2022-12-14 05:29:01,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:29:01,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:01,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:01,711 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:01,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-12-14 05:29:01,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-12-14 05:29:01,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:01,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 50 conjunts are in the unsatisfiable core [2022-12-14 05:29:01,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:02,186 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 6 proven. 574 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-12-14 05:29:02,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 36 proven. 646 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-12-14 05:29:08,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564101841] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:08,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1416805909] [2022-12-14 05:29:08,358 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:29:08,358 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:08,358 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:29:08,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:08,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 31] total 67 [2022-12-14 05:29:08,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725497131] [2022-12-14 05:29:08,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:08,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-12-14 05:29:08,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:08,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-12-14 05:29:08,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=4099, Unknown=0, NotChecked=0, Total=4556 [2022-12-14 05:29:08,363 INFO L87 Difference]: Start difference. First operand 172 states and 193 transitions. Second operand has 68 states, 67 states have (on average 2.5671641791044775) internal successors, (172), 66 states have internal predecessors, (172), 11 states have call successors, (13), 3 states have call predecessors, (13), 23 states have return successors, (34), 34 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 05:29:11,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:11,530 INFO L93 Difference]: Finished difference Result 376 states and 418 transitions. [2022-12-14 05:29:11,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-12-14 05:29:11,530 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 2.5671641791044775) internal successors, (172), 66 states have internal predecessors, (172), 11 states have call successors, (13), 3 states have call predecessors, (13), 23 states have return successors, (34), 34 states have call predecessors, (34), 9 states have call successors, (34) Word has length 147 [2022-12-14 05:29:11,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:11,531 INFO L225 Difference]: With dead ends: 376 [2022-12-14 05:29:11,531 INFO L226 Difference]: Without dead ends: 342 [2022-12-14 05:29:11,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 261 SyntacticMatches, 10 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7636 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2786, Invalid=23620, Unknown=0, NotChecked=0, Total=26406 [2022-12-14 05:29:11,535 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 666 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 2691 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 3117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 2691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:11,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 501 Invalid, 3117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 2691 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-12-14 05:29:11,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-12-14 05:29:11,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 296. [2022-12-14 05:29:11,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 237 states have (on average 1.029535864978903) internal successors, (244), 236 states have internal predecessors, (244), 9 states have call successors, (9), 6 states have call predecessors, (9), 49 states have return successors, (67), 53 states have call predecessors, (67), 7 states have call successors, (67) [2022-12-14 05:29:11,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 320 transitions. [2022-12-14 05:29:11,543 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 320 transitions. Word has length 147 [2022-12-14 05:29:11,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:11,544 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 320 transitions. [2022-12-14 05:29:11,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 2.5671641791044775) internal successors, (172), 66 states have internal predecessors, (172), 11 states have call successors, (13), 3 states have call predecessors, (13), 23 states have return successors, (34), 34 states have call predecessors, (34), 9 states have call successors, (34) [2022-12-14 05:29:11,544 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 320 transitions. [2022-12-14 05:29:11,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-12-14 05:29:11,545 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:11,545 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:11,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-12-14 05:29:11,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:11,746 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:29:11,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:11,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1555048102, now seen corresponding path program 4 times [2022-12-14 05:29:11,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:11,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813404219] [2022-12-14 05:29:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:11,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:12,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2022-12-14 05:29:12,915 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813404219] [2022-12-14 05:29:12,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813404219] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:12,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189018695] [2022-12-14 05:29:12,915 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:29:12,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:12,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:12,916 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:12,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-12-14 05:29:13,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:13,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 66 conjunts are in the unsatisfiable core [2022-12-14 05:29:13,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:13,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 0 proven. 723 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2022-12-14 05:29:13,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1368 backedges. 70 proven. 723 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2022-12-14 05:29:37,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189018695] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:37,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474670719] [2022-12-14 05:29:37,895 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2022-12-14 05:29:37,895 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:37,895 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:29:37,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:37,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 38] total 90 [2022-12-14 05:29:37,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961228610] [2022-12-14 05:29:37,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-12-14 05:29:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-12-14 05:29:37,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=7300, Unknown=0, NotChecked=0, Total=8190 [2022-12-14 05:29:37,899 INFO L87 Difference]: Start difference. First operand 296 states and 320 transitions. Second operand has 91 states, 90 states have (on average 2.3333333333333335) internal successors, (210), 89 states have internal predecessors, (210), 7 states have call successors, (7), 3 states have call predecessors, (7), 32 states have return successors, (48), 48 states have call predecessors, (48), 5 states have call successors, (48) [2022-12-14 05:29:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:41,021 INFO L93 Difference]: Finished difference Result 570 states and 646 transitions. [2022-12-14 05:29:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-12-14 05:29:41,021 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 2.3333333333333335) internal successors, (210), 89 states have internal predecessors, (210), 7 states have call successors, (7), 3 states have call predecessors, (7), 32 states have return successors, (48), 48 states have call predecessors, (48), 5 states have call successors, (48) Word has length 183 [2022-12-14 05:29:41,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:41,024 INFO L225 Difference]: With dead ends: 570 [2022-12-14 05:29:41,024 INFO L226 Difference]: Without dead ends: 569 [2022-12-14 05:29:41,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 312 SyntacticMatches, 15 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8894 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3472, Invalid=26978, Unknown=0, NotChecked=0, Total=30450 [2022-12-14 05:29:41,028 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 942 mSDsluCounter, 784 mSDsCounter, 0 mSdLazyCounter, 3262 mSolverCounterSat, 295 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 975 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 295 IncrementalHoareTripleChecker+Valid, 3262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:41,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [975 Valid, 811 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [295 Valid, 3262 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-12-14 05:29:41,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-12-14 05:29:41,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 376. [2022-12-14 05:29:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 301 states have (on average 1.0232558139534884) internal successors, (308), 300 states have internal predecessors, (308), 9 states have call successors, (9), 6 states have call predecessors, (9), 65 states have return successors, (99), 69 states have call predecessors, (99), 7 states have call successors, (99) [2022-12-14 05:29:41,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 416 transitions. [2022-12-14 05:29:41,049 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 416 transitions. Word has length 183 [2022-12-14 05:29:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:41,050 INFO L495 AbstractCegarLoop]: Abstraction has 376 states and 416 transitions. [2022-12-14 05:29:41,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 2.3333333333333335) internal successors, (210), 89 states have internal predecessors, (210), 7 states have call successors, (7), 3 states have call predecessors, (7), 32 states have return successors, (48), 48 states have call predecessors, (48), 5 states have call successors, (48) [2022-12-14 05:29:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 416 transitions. [2022-12-14 05:29:41,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-12-14 05:29:41,053 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:41,053 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:41,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-12-14 05:29:41,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-12-14 05:29:41,254 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:29:41,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:41,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1610067189, now seen corresponding path program 6 times [2022-12-14 05:29:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:41,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661480440] [2022-12-14 05:29:41,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:41,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:41,824 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 267 proven. 358 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2022-12-14 05:29:41,824 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:41,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661480440] [2022-12-14 05:29:41,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661480440] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:41,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898466258] [2022-12-14 05:29:41,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-12-14 05:29:41,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:41,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:41,825 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:41,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-12-14 05:29:42,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-12-14 05:29:42,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:29:42,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 52 conjunts are in the unsatisfiable core [2022-12-14 05:29:42,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:42,749 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 3 proven. 637 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-12-14 05:29:42,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:29:49,572 INFO L134 CoverageAnalysis]: Checked inductivity of 965 backedges. 3 proven. 691 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2022-12-14 05:29:49,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898466258] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:29:49,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [534083615] [2022-12-14 05:29:49,573 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:29:49,573 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:29:49,574 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:29:49,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:29:49,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 31, 34] total 76 [2022-12-14 05:29:49,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708715632] [2022-12-14 05:29:49,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:29:49,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-12-14 05:29:49,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:29:49,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-12-14 05:29:49,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=5320, Unknown=0, NotChecked=0, Total=5852 [2022-12-14 05:29:49,576 INFO L87 Difference]: Start difference. First operand 376 states and 416 transitions. Second operand has 77 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 74 states have internal predecessors, (202), 13 states have call successors, (15), 4 states have call predecessors, (15), 27 states have return successors, (41), 40 states have call predecessors, (41), 11 states have call successors, (41) [2022-12-14 05:29:53,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:29:53,818 INFO L93 Difference]: Finished difference Result 683 states and 770 transitions. [2022-12-14 05:29:53,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-12-14 05:29:53,818 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 74 states have internal predecessors, (202), 13 states have call successors, (15), 4 states have call predecessors, (15), 27 states have return successors, (41), 40 states have call predecessors, (41), 11 states have call successors, (41) Word has length 157 [2022-12-14 05:29:53,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:29:53,820 INFO L225 Difference]: With dead ends: 683 [2022-12-14 05:29:53,820 INFO L226 Difference]: Without dead ends: 616 [2022-12-14 05:29:53,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 266 SyntacticMatches, 11 SemanticMatches, 198 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12058 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4462, Invalid=35338, Unknown=0, NotChecked=0, Total=39800 [2022-12-14 05:29:53,823 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 836 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 3516 mSolverCounterSat, 394 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 836 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 3910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 394 IncrementalHoareTripleChecker+Valid, 3516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-12-14 05:29:53,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [836 Valid, 681 Invalid, 3910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [394 Valid, 3516 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-12-14 05:29:53,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-12-14 05:29:53,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 312. [2022-12-14 05:29:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 250 states have (on average 1.02) internal successors, (255), 249 states have internal predecessors, (255), 6 states have call successors, (6), 4 states have call predecessors, (6), 55 states have return successors, (88), 58 states have call predecessors, (88), 5 states have call successors, (88) [2022-12-14 05:29:53,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 349 transitions. [2022-12-14 05:29:53,840 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 349 transitions. Word has length 157 [2022-12-14 05:29:53,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:29:53,841 INFO L495 AbstractCegarLoop]: Abstraction has 312 states and 349 transitions. [2022-12-14 05:29:53,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 2.6578947368421053) internal successors, (202), 74 states have internal predecessors, (202), 13 states have call successors, (15), 4 states have call predecessors, (15), 27 states have return successors, (41), 40 states have call predecessors, (41), 11 states have call successors, (41) [2022-12-14 05:29:53,841 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 349 transitions. [2022-12-14 05:29:53,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-12-14 05:29:53,843 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:29:53,843 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 23, 23, 23, 23, 23, 23, 23, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:29:53,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-12-14 05:29:54,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:54,044 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:29:54,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:29:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -470236005, now seen corresponding path program 7 times [2022-12-14 05:29:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:29:54,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090451675] [2022-12-14 05:29:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:29:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:29:54,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 2 proven. 1640 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2022-12-14 05:29:56,127 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:29:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090451675] [2022-12-14 05:29:56,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090451675] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:29:56,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789755675] [2022-12-14 05:29:56,128 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-12-14 05:29:56,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:29:56,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:29:56,129 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:29:56,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-12-14 05:29:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:29:56,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 94 conjunts are in the unsatisfiable core [2022-12-14 05:29:56,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:29:57,948 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 2 proven. 1640 refuted. 0 times theorem prover too weak. 1328 trivial. 0 not checked. [2022-12-14 05:29:57,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:31:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 2 proven. 1742 refuted. 0 times theorem prover too weak. 1226 trivial. 0 not checked. [2022-12-14 05:31:13,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789755675] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-14 05:31:13,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1840593151] [2022-12-14 05:31:13,150 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:31:13,150 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:31:13,151 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:31:13,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-14 05:31:13,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 54] total 126 [2022-12-14 05:31:13,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922277360] [2022-12-14 05:31:13,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-14 05:31:13,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-12-14 05:31:13,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:31:13,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-12-14 05:31:13,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1562, Invalid=14440, Unknown=0, NotChecked=0, Total=16002 [2022-12-14 05:31:13,154 INFO L87 Difference]: Start difference. First operand 312 states and 349 transitions. Second operand has 127 states, 126 states have (on average 2.373015873015873) internal successors, (299), 125 states have internal predecessors, (299), 10 states have call successors, (10), 3 states have call predecessors, (10), 47 states have return successors, (70), 70 states have call predecessors, (70), 8 states have call successors, (70) [2022-12-14 05:31:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 05:31:25,023 INFO L93 Difference]: Finished difference Result 732 states and 814 transitions. [2022-12-14 05:31:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2022-12-14 05:31:25,024 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 126 states have (on average 2.373015873015873) internal successors, (299), 125 states have internal predecessors, (299), 10 states have call successors, (10), 3 states have call predecessors, (10), 47 states have return successors, (70), 70 states have call predecessors, (70), 8 states have call successors, (70) Word has length 267 [2022-12-14 05:31:25,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 05:31:25,025 INFO L225 Difference]: With dead ends: 732 [2022-12-14 05:31:25,025 INFO L226 Difference]: Without dead ends: 662 [2022-12-14 05:31:25,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 463 SyntacticMatches, 21 SemanticMatches, 340 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38535 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=8896, Invalid=107726, Unknown=0, NotChecked=0, Total=116622 [2022-12-14 05:31:25,031 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 1146 mSDsluCounter, 2316 mSDsCounter, 0 mSdLazyCounter, 10951 mSolverCounterSat, 634 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 2386 SdHoareTripleChecker+Invalid, 11585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 634 IncrementalHoareTripleChecker+Valid, 10951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-12-14 05:31:25,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 2386 Invalid, 11585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [634 Valid, 10951 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-12-14 05:31:25,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-12-14 05:31:25,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 556. [2022-12-14 05:31:25,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 445 states have (on average 1.0157303370786517) internal successors, (452), 444 states have internal predecessors, (452), 9 states have call successors, (9), 6 states have call predecessors, (9), 101 states have return successors, (135), 105 states have call predecessors, (135), 7 states have call successors, (135) [2022-12-14 05:31:25,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 596 transitions. [2022-12-14 05:31:25,043 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 596 transitions. Word has length 267 [2022-12-14 05:31:25,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 05:31:25,044 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 596 transitions. [2022-12-14 05:31:25,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 126 states have (on average 2.373015873015873) internal successors, (299), 125 states have internal predecessors, (299), 10 states have call successors, (10), 3 states have call predecessors, (10), 47 states have return successors, (70), 70 states have call predecessors, (70), 8 states have call successors, (70) [2022-12-14 05:31:25,044 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 596 transitions. [2022-12-14 05:31:25,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-12-14 05:31:25,045 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 05:31:25,045 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 25, 25, 25, 25, 25, 25, 25, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 05:31:25,053 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-12-14 05:31:25,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:31:25,247 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting multErr5ASSERT_VIOLATIONINTEGER_OVERFLOW === [multErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, multErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2022-12-14 05:31:25,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 05:31:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1999940329, now seen corresponding path program 8 times [2022-12-14 05:31:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 05:31:25,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468744422] [2022-12-14 05:31:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 05:31:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 05:31:25,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 05:31:27,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3503 backedges. 555 proven. 1444 refuted. 0 times theorem prover too weak. 1504 trivial. 0 not checked. [2022-12-14 05:31:27,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 05:31:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468744422] [2022-12-14 05:31:27,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468744422] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:31:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145171204] [2022-12-14 05:31:27,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-14 05:31:27,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-14 05:31:27,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 05:31:27,335 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-14 05:31:27,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32ab0c6c-c3c8-49fe-9d5e-fad4f0c639b5/bin/utaipan-gh47qXpMRh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-12-14 05:31:28,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2022-12-14 05:31:28,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-14 05:31:28,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 196 conjunts are in the unsatisfiable core [2022-12-14 05:31:28,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-14 05:31:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 3503 backedges. 105 proven. 2014 refuted. 0 times theorem prover too weak. 1384 trivial. 0 not checked. [2022-12-14 05:31:31,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-14 05:39:19,329 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_mult_#in~n_BEFORE_CALL_171| Int)) (or (not (= (mod (+ |c_mult_#in~n| (* |v_mult_#in~n_BEFORE_CALL_171| 20)) 21) 0)) (= (mod (+ (* 20 |c_mult_#res|) (* 19 |v_mult_#in~n_BEFORE_CALL_171|) (* 20 |c_mult_#in~n|)) 21) 0))) is different from false [2022-12-14 05:39:21,516 WARN L837 $PredicateComparison]: unable to prove that (forall ((|v_mult_#in~n_BEFORE_CALL_171| Int)) (or (not (= (mod (+ |c_mult_#in~n| (* |v_mult_#in~n_BEFORE_CALL_171| 20)) 21) 0)) (= (mod (+ (* |c_mult_#t~ret5| 20) (* 19 |v_mult_#in~n_BEFORE_CALL_171|) (* 20 |c_mult_#in~n|) (* c_mult_~n 20)) 21) 0))) is different from false [2022-12-14 05:41:14,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145171204] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-14 05:41:14,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1277078019] [2022-12-14 05:41:14,426 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2022-12-14 05:41:14,426 INFO L166 IcfgInterpreter]: Building call graph [2022-12-14 05:41:14,427 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-12-14 05:41:14,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-12-14 05:41:14,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 57] total 106 [2022-12-14 05:41:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119295625] [2022-12-14 05:41:14,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-12-14 05:41:14,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-12-14 05:41:14,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 05:41:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-12-14 05:41:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=13544, Unknown=229, NotChecked=474, Total=14762 [2022-12-14 05:41:14,431 INFO L87 Difference]: Start difference. First operand 556 states and 596 transitions. Second operand has 107 states, 106 states have (on average 2.2264150943396226) internal successors, (236), 104 states have internal predecessors, (236), 8 states have call successors, (10), 3 states have call predecessors, (10), 49 states have return successors, (51), 51 states have call predecessors, (51), 7 states have call successors, (51)