./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:17:34,183 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:17:34,297 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 21:17:34,303 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:17:34,303 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:17:34,358 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:17:34,359 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:17:34,360 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:17:34,361 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:17:34,366 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:17:34,367 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:17:34,368 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:17:34,368 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:17:34,370 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:17:34,370 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:17:34,371 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:17:34,371 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:17:34,372 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:17:34,372 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:17:34,372 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:17:34,373 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:17:34,373 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:17:34,374 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:17:34,375 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 21:17:34,375 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 21:17:34,376 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:17:34,376 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 21:17:34,376 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:17:34,377 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 21:17:34,377 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:17:34,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 21:17:34,379 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 21:17:34,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 21:17:34,379 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:17:34,379 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:17:34,380 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:17:34,380 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:17:34,380 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:34,380 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:17:34,381 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:17:34,381 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 21:17:34,381 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:17:34,381 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:17:34,382 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:17:34,382 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 21:17:34,382 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:17:34,383 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:17:34,383 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2023-11-23 21:17:34,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:34,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:34,760 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:34,763 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:34,764 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:34,765 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2023-11-23 21:17:37,922 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:38,181 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:38,182 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2023-11-23 21:17:38,192 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/data/3daee5144/c48aacd7907e4222af8047b10c6b6160/FLAGca892fe05 [2023-11-23 21:17:38,210 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/data/3daee5144/c48aacd7907e4222af8047b10c6b6160 [2023-11-23 21:17:38,215 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:38,217 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:38,220 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:38,220 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:38,226 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:38,227 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,229 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e44868e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38, skipping insertion in model container [2023-11-23 21:17:38,229 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,252 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:38,410 WARN L240 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_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2023-11-23 21:17:38,415 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:38,425 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:38,443 WARN L240 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_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2023-11-23 21:17:38,443 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:38,459 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:38,459 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38 WrapperNode [2023-11-23 21:17:38,459 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:38,461 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:38,461 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:38,461 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:38,469 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,478 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,502 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 35 [2023-11-23 21:17:38,502 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:38,503 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:38,504 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:38,504 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:38,514 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,514 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,517 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,517 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,529 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,532 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,533 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,544 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:38,548 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:38,549 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:38,549 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:38,551 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (1/1) ... [2023-11-23 21:17:38,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:38,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:38,588 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:38,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:38,640 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:38,641 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2023-11-23 21:17:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2023-11-23 21:17:38,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:38,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 21:17:38,727 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:38,731 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:38,893 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:38,946 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:38,946 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:38,948 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:38 BoogieIcfgContainer [2023-11-23 21:17:38,948 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:38,952 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:38,952 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:38,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:38,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:38" (1/3) ... [2023-11-23 21:17:38,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d810185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:38, skipping insertion in model container [2023-11-23 21:17:38,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:38" (2/3) ... [2023-11-23 21:17:38,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d810185 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:38, skipping insertion in model container [2023-11-23 21:17:38,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:38" (3/3) ... [2023-11-23 21:17:38,960 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2023-11-23 21:17:38,982 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:38,982 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:39,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:39,037 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@1c793df6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:39,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:39,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:17:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:17:39,049 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:39,050 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:39,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:39,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:39,057 INFO L85 PathProgramCache]: Analyzing trace with hash 174303331, now seen corresponding path program 1 times [2023-11-23 21:17:39,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:17:39,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459976436] [2023-11-23 21:17:39,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:39,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:17:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:17:39,273 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-23 21:17:39,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-23 21:17:39,350 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-23 21:17:39,360 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-23 21:17:39,361 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-11-23 21:17:39,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:17:39,371 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-11-23 21:17:39,376 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:17:39,397 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated [2023-11-23 21:17:39,399 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~nondet7 could not be translated [2023-11-23 21:17:39,399 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~short8 could not be translated [2023-11-23 21:17:39,419 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:17:39 BoogieIcfgContainer [2023-11-23 21:17:39,420 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:17:39,423 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:17:39,423 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:17:39,423 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:17:39,424 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:38" (3/4) ... [2023-11-23 21:17:39,427 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-23 21:17:39,428 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:17:39,430 INFO L158 Benchmark]: Toolchain (without parser) took 1212.02ms. Allocated memory is still 169.9MB. Free memory was 125.2MB in the beginning and 85.3MB in the end (delta: 39.8MB). Peak memory consumption was 39.8MB. Max. memory is 16.1GB. [2023-11-23 21:17:39,430 INFO L158 Benchmark]: CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 160.7kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:39,432 INFO L158 Benchmark]: CACSL2BoogieTranslator took 239.86ms. Allocated memory is still 169.9MB. Free memory was 125.2MB in the beginning and 115.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-11-23 21:17:39,433 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.94ms. Allocated memory is still 169.9MB. Free memory was 115.1MB in the beginning and 113.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:17:39,434 INFO L158 Benchmark]: Boogie Preprocessor took 44.05ms. Allocated memory is still 169.9MB. Free memory was 113.7MB in the beginning and 112.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:39,441 INFO L158 Benchmark]: RCFGBuilder took 400.17ms. Allocated memory is still 169.9MB. Free memory was 112.6MB in the beginning and 100.7MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-23 21:17:39,443 INFO L158 Benchmark]: TraceAbstraction took 468.70ms. Allocated memory is still 169.9MB. Free memory was 100.0MB in the beginning and 85.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2023-11-23 21:17:39,444 INFO L158 Benchmark]: Witness Printer took 5.65ms. Allocated memory is still 169.9MB. Free memory was 85.7MB in the beginning and 85.3MB in the end (delta: 360.2kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:17:39,454 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25ms. Allocated memory is still 115.3MB. Free memory was 70.1MB in the beginning and 70.0MB in the end (delta: 160.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 239.86ms. Allocated memory is still 169.9MB. Free memory was 125.2MB in the beginning and 115.1MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.94ms. Allocated memory is still 169.9MB. Free memory was 115.1MB in the beginning and 113.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.05ms. Allocated memory is still 169.9MB. Free memory was 113.7MB in the beginning and 112.6MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 400.17ms. Allocated memory is still 169.9MB. Free memory was 112.6MB in the beginning and 100.7MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 468.70ms. Allocated memory is still 169.9MB. Free memory was 100.0MB in the beginning and 85.7MB in the end (delta: 14.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Witness Printer took 5.65ms. Allocated memory is still 169.9MB. Free memory was 85.7MB in the beginning and 85.3MB in the end (delta: 360.2kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~ret6 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~nondet7 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~short8 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 36]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) VAL [n=1] [L31] unsigned result = hanoi(n); [L33] result+1>0 && result+1 == 1<0 && result+1 == 1<0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2023-11-23 21:17:42,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:17:42,957 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:17:42,960 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:17:42,961 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:17:42,961 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:17:42,963 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2023-11-23 21:17:46,030 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:17:46,299 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:17:46,300 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2023-11-23 21:17:46,313 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/data/aca0d05a3/96fca30e566b4e6282d1ce6e970307b9/FLAG8dd9d6cd9 [2023-11-23 21:17:46,329 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/data/aca0d05a3/96fca30e566b4e6282d1ce6e970307b9 [2023-11-23 21:17:46,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:17:46,334 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:17:46,335 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:46,335 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:17:46,341 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:17:46,342 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,343 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33fc2d3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46, skipping insertion in model container [2023-11-23 21:17:46,343 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,364 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:17:46,572 WARN L240 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_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2023-11-23 21:17:46,578 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:46,596 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:17:46,615 WARN L240 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_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2023-11-23 21:17:46,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:17:46,633 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:17:46,634 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46 WrapperNode [2023-11-23 21:17:46,634 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:17:46,636 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:46,636 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:17:46,636 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:17:46,645 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,656 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,676 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2023-11-23 21:17:46,677 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:17:46,678 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:17:46,678 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:17:46,679 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:17:46,690 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,690 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,699 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,699 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,714 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,723 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:17:46,730 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:17:46,730 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:17:46,730 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:17:46,732 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (1/1) ... [2023-11-23 21:17:46,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:17:46,752 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:46,770 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:17:46,793 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:17:46,826 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 21:17:46,827 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2023-11-23 21:17:46,827 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2023-11-23 21:17:46,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:17:46,828 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:17:46,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-11-23 21:17:46,979 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:17:46,985 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:17:47,191 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:17:47,238 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:17:47,239 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 21:17:47,239 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:47 BoogieIcfgContainer [2023-11-23 21:17:47,240 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:17:47,243 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:17:47,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:17:47,252 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:17:47,253 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:17:46" (1/3) ... [2023-11-23 21:17:47,254 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303ec0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:47, skipping insertion in model container [2023-11-23 21:17:47,254 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:17:46" (2/3) ... [2023-11-23 21:17:47,255 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@303ec0d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:17:47, skipping insertion in model container [2023-11-23 21:17:47,256 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:17:47" (3/3) ... [2023-11-23 21:17:47,257 INFO L112 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2023-11-23 21:17:47,280 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:17:47,280 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 21:17:47,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:17:47,366 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@47a27d9c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:17:47,372 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 21:17:47,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-23 21:17:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 21:17:47,393 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:47,394 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:47,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:47,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:47,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1546859687, now seen corresponding path program 1 times [2023-11-23 21:17:47,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:17:47,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430269898] [2023-11-23 21:17:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:47,433 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:17:47,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:17:47,440 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:17:47,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2023-11-23 21:17:47,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:47,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-23 21:17:47,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:47,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:17:47,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-23 21:17:47,783 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:17:47,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430269898] [2023-11-23 21:17:47,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430269898] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:17:47,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:17:47,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-23 21:17:47,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973714407] [2023-11-23 21:17:47,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:17:47,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-23 21:17:47,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:17:47,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-23 21:17:47,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-23 21:17:47,828 INFO L87 Difference]: Start difference. First operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:17:47,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:47,960 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-23 21:17:47,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:17:47,967 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-11-23 21:17:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:47,977 INFO L225 Difference]: With dead ends: 25 [2023-11-23 21:17:47,977 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 21:17:47,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-23 21:17:47,984 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 11 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:47,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 21 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:17:48,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 21:17:48,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 21:17:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-11-23 21:17:48,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-23 21:17:48,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2023-11-23 21:17:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:48,027 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-23 21:17:48,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-23 21:17:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-23 21:17:48,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 21:17:48,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:48,030 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:48,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:48,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:17:48,232 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:48,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:48,233 INFO L85 PathProgramCache]: Analyzing trace with hash -797183849, now seen corresponding path program 1 times [2023-11-23 21:17:48,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:17:48,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1729896134] [2023-11-23 21:17:48,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:48,234 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:17:48,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:17:48,236 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:17:48,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2023-11-23 21:17:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:48,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:17:48,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:48,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:17:48,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:49,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:17:49,177 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:17:49,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1729896134] [2023-11-23 21:17:49,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1729896134] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:49,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [261895699] [2023-11-23 21:17:49,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:49,183 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:17:49,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:17:49,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:17:49,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2023-11-23 21:17:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:49,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:17:49,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:49,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:17:49,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:17:49,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [261895699] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:49,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870243081] [2023-11-23 21:17:49,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:17:49,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:49,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:49,625 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:49,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-23 21:17:49,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:17:49,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-23 21:17:49,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:17:49,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 21:17:50,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870243081] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:50,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:17:50,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2023-11-23 21:17:50,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297799744] [2023-11-23 21:17:50,113 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:17:50,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 21:17:50,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:17:50,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 21:17:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2023-11-23 21:17:50,122 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:17:50,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:50,592 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-11-23 21:17:50,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-23 21:17:50,593 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2023-11-23 21:17:50,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:50,594 INFO L225 Difference]: With dead ends: 27 [2023-11-23 21:17:50,595 INFO L226 Difference]: Without dead ends: 21 [2023-11-23 21:17:50,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:17:50,597 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:50,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 39 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 21:17:50,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-23 21:17:50,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-23 21:17:50,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-23 21:17:50,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-11-23 21:17:50,604 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 16 [2023-11-23 21:17:50,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:50,604 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-11-23 21:17:50,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 12 states have internal predecessors, (21), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-23 21:17:50,610 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-11-23 21:17:50,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-23 21:17:50,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:50,613 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:50,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (4)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:50,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:51,031 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:51,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:51,217 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:51,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:51,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1671831511, now seen corresponding path program 2 times [2023-11-23 21:17:51,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:17:51,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1287187066] [2023-11-23 21:17:51,218 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:17:51,218 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:17:51,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:17:51,223 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:17:51,228 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2023-11-23 21:17:51,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:17:51,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:17:51,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:17:51,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:51,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:17:51,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:53,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:17:53,375 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:17:53,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1287187066] [2023-11-23 21:17:53,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1287187066] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:53,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [909815271] [2023-11-23 21:17:53,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:17:53,376 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:17:53,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:17:53,378 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:17:53,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2023-11-23 21:17:53,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:17:53,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:17:53,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:17:53,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:53,627 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:17:53,628 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:54,559 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:17:54,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [909815271] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:54,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411914717] [2023-11-23 21:17:54,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-23 21:17:54,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:17:54,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:17:54,562 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:17:54,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-23 21:17:54,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-23 21:17:54,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:17:54,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-23 21:17:54,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:54,728 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:17:54,728 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:55,490 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-23 21:17:55,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411914717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:55,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:17:55,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 13, 15, 13, 15] total 26 [2023-11-23 21:17:55,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895693549] [2023-11-23 21:17:55,492 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:17:55,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-11-23 21:17:55,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:17:55,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-11-23 21:17:55,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2023-11-23 21:17:55,498 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 26 states, 25 states have (on average 1.32) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 21:17:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:17:56,192 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2023-11-23 21:17:56,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 21:17:56,194 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 28 [2023-11-23 21:17:56,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:17:56,196 INFO L225 Difference]: With dead ends: 33 [2023-11-23 21:17:56,196 INFO L226 Difference]: Without dead ends: 27 [2023-11-23 21:17:56,197 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:17:56,198 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 56 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 21:17:56,198 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 79 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 21:17:56,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-23 21:17:56,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-11-23 21:17:56,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-23 21:17:56,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2023-11-23 21:17:56,212 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 28 [2023-11-23 21:17:56,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:17:56,213 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2023-11-23 21:17:56,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.32) internal successors, (33), 18 states have internal predecessors, (33), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2023-11-23 21:17:56,214 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2023-11-23 21:17:56,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-23 21:17:56,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:17:56,216 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:17:56,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:56,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:56,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2023-11-23 21:17:56,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:17:56,819 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:17:56,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:17:56,820 INFO L85 PathProgramCache]: Analyzing trace with hash -695406825, now seen corresponding path program 3 times [2023-11-23 21:17:56,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:17:56,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1124537504] [2023-11-23 21:17:56,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:17:56,821 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:17:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:17:56,822 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:17:56,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2023-11-23 21:17:56,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 21:17:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:17:56,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:17:56,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:17:57,255 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:17:57,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:17:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:17:59,917 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:17:59,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1124537504] [2023-11-23 21:17:59,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1124537504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:17:59,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [333583126] [2023-11-23 21:17:59,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:17:59,920 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:17:59,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:17:59,922 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:17:59,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2023-11-23 21:18:00,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 21:18:00,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:00,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 21:18:00,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:00,301 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-23 21:18:00,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:01,728 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:18:01,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [333583126] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:01,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404165418] [2023-11-23 21:18:01,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:18:01,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:01,730 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:01,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-23 21:18:01,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-23 21:18:01,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:01,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-23 21:18:01,803 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-11-23 21:18:01,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-23 21:18:03,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404165418] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:03,075 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:18:03,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21, 18, 21, 17, 21] total 37 [2023-11-23 21:18:03,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254533091] [2023-11-23 21:18:03,076 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:03,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-23 21:18:03,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:18:03,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-23 21:18:03,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1204, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 21:18:03,079 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 37 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-23 21:18:04,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:04,160 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2023-11-23 21:18:04,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 21:18:04,161 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) Word has length 40 [2023-11-23 21:18:04,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:04,162 INFO L225 Difference]: With dead ends: 39 [2023-11-23 21:18:04,162 INFO L226 Difference]: Without dead ends: 33 [2023-11-23 21:18:04,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=310, Invalid=2342, Unknown=0, NotChecked=0, Total=2652 [2023-11-23 21:18:04,165 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 50 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:04,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 144 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 21:18:04,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-23 21:18:04,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-11-23 21:18:04,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-23 21:18:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-11-23 21:18:04,173 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 40 [2023-11-23 21:18:04,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:04,173 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-11-23 21:18:04,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (9), 1 states have call predecessors, (9), 12 states have return successors, (13), 12 states have call predecessors, (13), 9 states have call successors, (13) [2023-11-23 21:18:04,174 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-11-23 21:18:04,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-23 21:18:04,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:04,176 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:04,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-23 21:18:04,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:04,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:04,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt [2023-11-23 21:18:04,783 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:04,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1239392681, now seen corresponding path program 4 times [2023-11-23 21:18:04,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:18:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251245056] [2023-11-23 21:18:04,784 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:18:04,784 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:18:04,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:18:04,785 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:18:04,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2023-11-23 21:18:04,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:18:04,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:04,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 21:18:04,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:05,342 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-23 21:18:05,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:09,467 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:18:09,467 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:18:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251245056] [2023-11-23 21:18:09,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251245056] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:09,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926979481] [2023-11-23 21:18:09,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:18:09,469 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:18:09,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:18:09,472 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:18:09,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2023-11-23 21:18:09,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:18:09,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:09,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 21:18:09,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:09,778 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-23 21:18:09,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:11,882 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:18:11,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [926979481] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:11,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076777076] [2023-11-23 21:18:11,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-23 21:18:11,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:11,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:11,885 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:11,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-23 21:18:11,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-23 21:18:11,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:11,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-23 21:18:11,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:12,134 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2023-11-23 21:18:12,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:13,786 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-11-23 21:18:13,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076777076] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:13,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:18:13,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27, 21, 27, 21, 27] total 46 [2023-11-23 21:18:13,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263607730] [2023-11-23 21:18:13,787 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:13,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-23 21:18:13,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:18:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-23 21:18:13,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2023-11-23 21:18:13,791 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 30 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-23 21:18:15,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:18:15,470 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-11-23 21:18:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-23 21:18:15,471 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 30 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 52 [2023-11-23 21:18:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:18:15,472 INFO L225 Difference]: With dead ends: 45 [2023-11-23 21:18:15,473 INFO L226 Difference]: Without dead ends: 39 [2023-11-23 21:18:15,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=414, Invalid=3746, Unknown=0, NotChecked=0, Total=4160 [2023-11-23 21:18:15,476 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-23 21:18:15,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 261 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-23 21:18:15,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-23 21:18:15,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-11-23 21:18:15,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2023-11-23 21:18:15,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2023-11-23 21:18:15,485 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 52 [2023-11-23 21:18:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:18:15,486 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2023-11-23 21:18:15,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 30 states have internal predecessors, (57), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2023-11-23 21:18:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2023-11-23 21:18:15,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-11-23 21:18:15,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:18:15,490 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:18:15,502 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:15,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:15,905 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-23 21:18:16,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:16,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 21:18:16,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:18:16,093 INFO L85 PathProgramCache]: Analyzing trace with hash -11506281, now seen corresponding path program 5 times [2023-11-23 21:18:16,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-11-23 21:18:16,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2033703886] [2023-11-23 21:18:16,093 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:18:16,094 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2023-11-23 21:18:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat [2023-11-23 21:18:16,095 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2023-11-23 21:18:16,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2023-11-23 21:18:16,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-23 21:18:16,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:16,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-23 21:18:16,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:16,784 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-23 21:18:16,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:21,958 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 21:18:21,958 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-11-23 21:18:21,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2033703886] [2023-11-23 21:18:21,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2033703886] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:21,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1079261105] [2023-11-23 21:18:21,959 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:18:21,959 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-11-23 21:18:21,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 [2023-11-23 21:18:21,960 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-11-23 21:18:21,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-11-23 21:18:22,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-23 21:18:22,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:22,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-23 21:18:22,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:22,361 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 5 proven. 135 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2023-11-23 21:18:22,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:24,627 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 21:18:24,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1079261105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:24,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773921511] [2023-11-23 21:18:24,628 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-23 21:18:24,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:18:24,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:18:24,629 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:18:24,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b2b9d9c6-c5e9-426e-84d9-02b509fdf798/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-23 21:18:24,733 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-23 21:18:24,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:18:24,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-23 21:18:24,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:18:24,948 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2023-11-23 21:18:24,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:18:27,273 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-11-23 21:18:27,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773921511] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:18:27,274 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-11-23 21:18:27,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33, 26, 33, 25, 33] total 57 [2023-11-23 21:18:27,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280019182] [2023-11-23 21:18:27,275 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-11-23 21:18:27,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-23 21:18:27,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-11-23 21:18:27,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-23 21:18:27,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2984, Unknown=0, NotChecked=0, Total=3192 [2023-11-23 21:18:27,280 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 57 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 37 states have internal predecessors, (70), 13 states have call successors, (13), 1 states have call predecessors, (13), 20 states have return successors, (22), 20 states have call predecessors, (22), 13 states have call successors, (22)