./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh --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 55ec916898aa0c4eb40269e81429fc0273ca07ec4caf7be0cd441cce0028ad79 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:04:13,781 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:04:13,846 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-12-02 20:04:13,851 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:04:13,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:04:13,878 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:04:13,879 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:04:13,879 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:04:13,880 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:04:13,880 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:04:13,881 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:04:13,881 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:04:13,882 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:04:13,883 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-12-02 20:04:13,883 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:04:13,884 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:04:13,884 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-12-02 20:04:13,885 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-12-02 20:04:13,885 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:04:13,886 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-12-02 20:04:13,886 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-12-02 20:04:13,887 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-12-02 20:04:13,888 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:04:13,889 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:04:13,889 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:04:13,889 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-02 20:04:13,890 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:04:13,890 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:04:13,891 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:04:13,891 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:04:13,891 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:04:13,892 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:04:13,892 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:04:13,892 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:04:13,893 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:04:13,893 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:04:13,893 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:04:13,893 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:04:13,893 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:04:13,894 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:04:13,894 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:04:13,894 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-12-02 20:04:13,894 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-02 20:04:13,895 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:04:13,895 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:04:13,895 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:04:13,895 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:04:13,895 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_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55ec916898aa0c4eb40269e81429fc0273ca07ec4caf7be0cd441cce0028ad79 [2023-12-02 20:04:14,103 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:04:14,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:04:14,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:04:14,129 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:04:14,130 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:04:14,131 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2023-12-02 20:04:16,873 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:04:17,086 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:04:17,086 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2023-12-02 20:04:17,098 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data/3a50a9e7b/e3a2db2daff24dafbe67053c12b889a7/FLAG383b336c8 [2023-12-02 20:04:17,113 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data/3a50a9e7b/e3a2db2daff24dafbe67053c12b889a7 [2023-12-02 20:04:17,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:04:17,116 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:04:17,118 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:04:17,118 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:04:17,122 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:04:17,123 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,124 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8105672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17, skipping insertion in model container [2023-12-02 20:04:17,124 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:04:17,388 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_afff1957-16bc-40eb-b259-63bc9bb856fe/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c[26555,26568] [2023-12-02 20:04:17,393 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:04:17,406 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:04:17,474 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_afff1957-16bc-40eb-b259-63bc9bb856fe/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c[26555,26568] [2023-12-02 20:04:17,475 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:04:17,493 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:04:17,493 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17 WrapperNode [2023-12-02 20:04:17,493 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:04:17,494 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:04:17,494 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:04:17,494 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:04:17,500 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,513 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,551 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 520 [2023-12-02 20:04:17,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:04:17,552 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:04:17,552 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:04:17,552 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:04:17,561 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,562 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,566 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,566 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,580 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,588 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,592 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,594 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:04:17,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:04:17,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:04:17,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:04:17,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (1/1) ... [2023-12-02 20:04:17,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:04:17,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:17,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:04:17,637 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:04:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:04:17,665 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-12-02 20:04:17,666 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:04:17,666 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:04:17,791 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:04:17,793 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:04:18,270 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:04:19,200 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:04:19,200 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 20:04:19,201 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:04:19 BoogieIcfgContainer [2023-12-02 20:04:19,202 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:04:19,204 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:04:19,204 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:04:19,207 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:04:19,208 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:04:17" (1/3) ... [2023-12-02 20:04:19,208 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57495efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:04:19, skipping insertion in model container [2023-12-02 20:04:19,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:04:17" (2/3) ... [2023-12-02 20:04:19,209 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57495efa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:04:19, skipping insertion in model container [2023-12-02 20:04:19,209 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:04:19" (3/3) ... [2023-12-02 20:04:19,210 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2023-12-02 20:04:19,229 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:04:19,229 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:04:19,276 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:04:19,282 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;@64b5311e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:04:19,283 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:04:19,288 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:19,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-02 20:04:19,295 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:19,295 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-02 20:04:19,296 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:04:19,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:19,301 INFO L85 PathProgramCache]: Analyzing trace with hash 488478520, now seen corresponding path program 1 times [2023-12-02 20:04:19,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:19,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076721262] [2023-12-02 20:04:19,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:19,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:21,920 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:21,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076721262] [2023-12-02 20:04:21,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076721262] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:21,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:21,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:04:21,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392340342] [2023-12-02 20:04:21,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:21,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:04:21,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:21,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:04:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:04:21,958 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:22,063 INFO L93 Difference]: Finished difference Result 33 states and 48 transitions. [2023-12-02 20:04:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:04:22,065 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-02 20:04:22,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:22,073 INFO L225 Difference]: With dead ends: 33 [2023-12-02 20:04:22,073 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 20:04:22,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:04:22,079 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:22,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 20 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 20:04:22,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2023-12-02 20:04:22,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:22,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2023-12-02 20:04:22,115 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 6 [2023-12-02 20:04:22,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:22,115 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2023-12-02 20:04:22,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:22,115 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2023-12-02 20:04:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-02 20:04:22,116 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:22,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:22,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-02 20:04:22,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:04:22,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:22,117 INFO L85 PathProgramCache]: Analyzing trace with hash 518009886, now seen corresponding path program 1 times [2023-12-02 20:04:22,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:22,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957946962] [2023-12-02 20:04:22,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:22,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:22,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:22,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:22,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:22,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957946962] [2023-12-02 20:04:22,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957946962] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:22,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:22,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:04:22,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098485427] [2023-12-02 20:04:22,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:22,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:04:22,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:04:22,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:04:22,563 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:22,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:22,622 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2023-12-02 20:04:22,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:04:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-02 20:04:22,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:22,623 INFO L225 Difference]: With dead ends: 32 [2023-12-02 20:04:22,624 INFO L226 Difference]: Without dead ends: 22 [2023-12-02 20:04:22,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:04:22,625 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 8 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:22,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 25 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-02 20:04:22,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2023-12-02 20:04:22,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:22,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-02 20:04:22,632 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2023-12-02 20:04:22,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:22,632 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-02 20:04:22,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:22,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-02 20:04:22,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-12-02 20:04:22,633 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:22,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:22,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-02 20:04:22,634 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:04:22,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:22,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1135277540, now seen corresponding path program 1 times [2023-12-02 20:04:22,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:22,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913049977] [2023-12-02 20:04:22,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:22,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:24,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:24,503 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:24,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913049977] [2023-12-02 20:04:24,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913049977] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:04:24,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:04:24,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-02 20:04:24,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145819255] [2023-12-02 20:04:24,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:04:24,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:04:24,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:04:24,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:04:24,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-02 20:04:24,507 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:24,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:04:24,593 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-12-02 20:04:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-02 20:04:24,593 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-12-02 20:04:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:04:24,594 INFO L225 Difference]: With dead ends: 27 [2023-12-02 20:04:24,594 INFO L226 Difference]: Without dead ends: 25 [2023-12-02 20:04:24,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-02 20:04:24,596 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:04:24,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 34 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:04:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-12-02 20:04:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2023-12-02 20:04:24,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:24,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-02 20:04:24,603 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 9 [2023-12-02 20:04:24,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:04:24,603 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-02 20:04:24,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:04:24,603 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-02 20:04:24,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-02 20:04:24,604 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:04:24,604 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:04:24,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-02 20:04:24,605 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:04:24,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:04:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash 784330903, now seen corresponding path program 1 times [2023-12-02 20:04:24,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-12-02 20:04:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611910659] [2023-12-02 20:04:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-02 20:04:24,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:38,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:04:38,692 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-12-02 20:04:38,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611910659] [2023-12-02 20:04:38,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611910659] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-02 20:04:38,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49591897] [2023-12-02 20:04:38,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:04:38,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:04:38,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:04:38,694 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:04:38,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-02 20:04:38,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:04:38,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 58 conjunts are in the unsatisfiable core [2023-12-02 20:04:39,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:04:53,995 WARN L667 sPolynomialRelations]: Constructing 128(two to the power of 7 dual juncts. [2023-12-02 20:05:06,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:05:06,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:11:00,999 WARN L293 SmtUtils]: Spent 5.64s on a formula simplification. DAG size of input: 424 DAG size of output: 769 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-02 20:14:13,029 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) stderr output: (error "out of memory") [2023-12-02 20:14:13,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 101 [2023-12-02 20:14:13,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Received EOF on stdin. stderr output: (error "out of memory") [2023-12-02 20:14:13,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530194805] [2023-12-02 20:14:13,045 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2023-12-02 20:14:13,045 INFO L166 IcfgInterpreter]: Building call graph [2023-12-02 20:14:13,047 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-12-02 20:14:13,051 INFO L176 IcfgInterpreter]: Starting interpretation [2023-12-02 20:14:13,051 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-12-02 20:14:13,075 FATAL L? ?]: Ignoring exception! de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.push(Scriptor.java:132) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.push(DiffWrapperScript.java:90) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.push(WrapperScript.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.push(HistoryRecordingScript.java:107) at de.uni_freiburg.informatik.ultimate.logic.Util.checkSat(Util.java:48) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.checkSatTerm(SmtUtils.java:332) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.isFalse(SymbolicTools.java:223) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.RelationCheckUtil.isEqBottom_SolverAlphaSolver(RelationCheckUtil.java:56) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.ExplicitValueDomain.isEqBottom(ExplicitValueDomain.java:73) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.CompoundDomain.isEqBottom(CompoundDomain.java:84) at de.uni_freiburg.informatik.ultimate.lib.sifa.domain.StatsWrapperDomain.isEqBottom(StatsWrapperDomain.java:69) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.earlyExitAfterStep(DagInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:125) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 44 more [2023-12-02 20:14:13,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-02 20:14:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2023-12-02 20:14:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757017520] [2023-12-02 20:14:13,077 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-02 20:14:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-02 20:14:13,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-12-02 20:14:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-02 20:14:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:14:13,079 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:13,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-12-02 20:14:13,081 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:13,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:13,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-02 20:14:13,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:14:13,282 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:177) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:139) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.pop(ManagedScript.java:138) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.unAssertCodeBlock(IncrementalHoareTripleChecker.java:436) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.clearAssertionStack(IncrementalHoareTripleChecker.java:278) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.releaseLock(IncrementalHoareTripleChecker.java:284) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.releaseLock(ChainingHoareTripleChecker.java:449) at java.base/java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1655) at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.releaseLock(ChainingHoareTripleChecker.java:98) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.releaseLock(CachingHoareTripleChecker.java:159) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.switchToReadonlyMode(AbstractInterpolantAutomaton.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeAutomataDifference(NwaCegarLoop.java:365) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.refineAbstraction(NwaCegarLoop.java:325) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:487) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: java.io.IOException: Stream closed at java.base/java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:442) at java.base/java.io.OutputStream.write(OutputStream.java:157) at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) at java.base/sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:318) at java.base/sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:153) at java.base/java.io.OutputStreamWriter.flush(OutputStreamWriter.java:251) at java.base/java.io.BufferedWriter.flush(BufferedWriter.java:257) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.input(Executor.java:175) ... 36 more [2023-12-02 20:14:13,285 INFO L158 Benchmark]: Toolchain (without parser) took 596168.10ms. Allocated memory was 155.2MB in the beginning and 903.9MB in the end (delta: 748.7MB). Free memory was 109.1MB in the beginning and 651.5MB in the end (delta: -542.5MB). Peak memory consumption was 208.0MB. Max. memory is 16.1GB. [2023-12-02 20:14:13,285 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-12-02 20:14:13,285 INFO L158 Benchmark]: CACSL2BoogieTranslator took 375.93ms. Allocated memory is still 155.2MB. Free memory was 108.7MB in the beginning and 90.2MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-12-02 20:14:13,285 INFO L158 Benchmark]: Boogie Procedure Inliner took 57.14ms. Allocated memory is still 155.2MB. Free memory was 90.2MB in the beginning and 87.0MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:14:13,286 INFO L158 Benchmark]: Boogie Preprocessor took 46.62ms. Allocated memory is still 155.2MB. Free memory was 86.7MB in the beginning and 83.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-12-02 20:14:13,286 INFO L158 Benchmark]: RCFGBuilder took 1602.61ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 83.9MB in the beginning and 102.5MB in the end (delta: -18.6MB). Peak memory consumption was 67.3MB. Max. memory is 16.1GB. [2023-12-02 20:14:13,287 INFO L158 Benchmark]: TraceAbstraction took 594079.71ms. Allocated memory was 186.6MB in the beginning and 903.9MB in the end (delta: 717.2MB). Free memory was 101.5MB in the beginning and 651.5MB in the end (delta: -550.0MB). Peak memory consumption was 168.0MB. Max. memory is 16.1GB. [2023-12-02 20:14:13,288 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 113.2MB. Free memory is still 58.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 375.93ms. Allocated memory is still 155.2MB. Free memory was 108.7MB in the beginning and 90.2MB in the end (delta: 18.5MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 57.14ms. Allocated memory is still 155.2MB. Free memory was 90.2MB in the beginning and 87.0MB in the end (delta: 3.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.62ms. Allocated memory is still 155.2MB. Free memory was 86.7MB in the beginning and 83.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 1602.61ms. Allocated memory was 155.2MB in the beginning and 186.6MB in the end (delta: 31.5MB). Free memory was 83.9MB in the beginning and 102.5MB in the end (delta: -18.6MB). Peak memory consumption was 67.3MB. Max. memory is 16.1GB. * TraceAbstraction took 594079.71ms. Allocated memory was 186.6MB in the beginning and 903.9MB in the end (delta: 717.2MB). Free memory was 101.5MB in the beginning and 651.5MB in the end (delta: -550.0MB). Peak memory consumption was 168.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1) with exit command (exit)) Connection to SMT solver broken: de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.convertIOException(Executor.java:337) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh --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 55ec916898aa0c4eb40269e81429fc0273ca07ec4caf7be0cd441cce0028ad79 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-12-02 20:14:15,006 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-02 20:14:15,084 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2023-12-02 20:14:15,089 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-02 20:14:15,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-02 20:14:15,117 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-02 20:14:15,117 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-02 20:14:15,118 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-02 20:14:15,119 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-02 20:14:15,119 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-02 20:14:15,120 INFO L153 SettingsManager]: * User list type=DISABLED [2023-12-02 20:14:15,121 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-12-02 20:14:15,121 INFO L153 SettingsManager]: * Explicit value domain=true [2023-12-02 20:14:15,122 INFO L153 SettingsManager]: * Octagon Domain=false [2023-12-02 20:14:15,122 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-12-02 20:14:15,123 INFO L153 SettingsManager]: * Interval Domain=false [2023-12-02 20:14:15,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-02 20:14:15,125 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-02 20:14:15,125 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-02 20:14:15,126 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-02 20:14:15,126 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-02 20:14:15,127 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-02 20:14:15,127 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-02 20:14:15,128 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-02 20:14:15,128 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-12-02 20:14:15,129 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-12-02 20:14:15,129 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-12-02 20:14:15,130 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-02 20:14:15,130 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-02 20:14:15,130 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-02 20:14:15,131 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-02 20:14:15,131 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-02 20:14:15,132 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-02 20:14:15,132 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-02 20:14:15,132 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:14:15,132 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-02 20:14:15,133 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-02 20:14:15,133 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-02 20:14:15,133 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2023-12-02 20:14:15,133 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:15,134 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-02 20:14:15,134 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-02 20:14:15,134 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-12-02 20:14:15,134 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-02 20:14:15,135 INFO L153 SettingsManager]: * Logic for external solver=AUFBV 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_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55ec916898aa0c4eb40269e81429fc0273ca07ec4caf7be0cd441cce0028ad79 [2023-12-02 20:14:15,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-02 20:14:15,454 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-02 20:14:15,456 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-02 20:14:15,457 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-02 20:14:15,458 INFO L274 PluginConnector]: CDTParser initialized [2023-12-02 20:14:15,459 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/../../sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2023-12-02 20:14:18,292 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-02 20:14:18,528 INFO L384 CDTParser]: Found 1 translation units. [2023-12-02 20:14:18,529 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2023-12-02 20:14:18,543 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data/c258bc6e5/82194e2971f544bea6ef83b56533c63c/FLAG3a6a25df9 [2023-12-02 20:14:18,556 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/data/c258bc6e5/82194e2971f544bea6ef83b56533c63c [2023-12-02 20:14:18,558 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-02 20:14:18,559 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-12-02 20:14:18,560 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-02 20:14:18,561 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-02 20:14:18,565 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-02 20:14:18,565 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:18,566 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c45cc67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18, skipping insertion in model container [2023-12-02 20:14:18,566 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:18,610 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-02 20:14:18,837 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_afff1957-16bc-40eb-b259-63bc9bb856fe/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c[26555,26568] [2023-12-02 20:14:18,841 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:14:18,856 INFO L202 MainTranslator]: Completed pre-run [2023-12-02 20:14:18,925 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_afff1957-16bc-40eb-b259-63bc9bb856fe/sv-benchmarks/c/seq-mthreaded/pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c[26555,26568] [2023-12-02 20:14:18,926 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-02 20:14:18,942 INFO L206 MainTranslator]: Completed translation [2023-12-02 20:14:18,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18 WrapperNode [2023-12-02 20:14:18,943 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-02 20:14:18,944 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-02 20:14:18,944 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-02 20:14:18,944 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-02 20:14:18,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:18,965 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:18,999 INFO L138 Inliner]: procedures = 28, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 494 [2023-12-02 20:14:19,000 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-02 20:14:19,001 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-02 20:14:19,001 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-02 20:14:19,001 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-02 20:14:19,011 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,011 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,017 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,018 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,041 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,049 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,052 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,055 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,060 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-02 20:14:19,061 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-02 20:14:19,062 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-02 20:14:19,062 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-02 20:14:19,063 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (1/1) ... [2023-12-02 20:14:19,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-12-02 20:14:19,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:14:19,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-12-02 20:14:19,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-12-02 20:14:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-02 20:14:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2023-12-02 20:14:19,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-02 20:14:19,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-02 20:14:19,264 INFO L241 CfgBuilder]: Building ICFG [2023-12-02 20:14:19,266 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-02 20:14:19,770 INFO L282 CfgBuilder]: Performing block encoding [2023-12-02 20:14:19,812 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-02 20:14:19,812 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-02 20:14:19,813 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:14:19 BoogieIcfgContainer [2023-12-02 20:14:19,813 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-02 20:14:19,816 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-02 20:14:19,816 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-02 20:14:19,819 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-02 20:14:19,819 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 08:14:18" (1/3) ... [2023-12-02 20:14:19,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683eefcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:14:19, skipping insertion in model container [2023-12-02 20:14:19,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 08:14:18" (2/3) ... [2023-12-02 20:14:19,820 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@683eefcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 08:14:19, skipping insertion in model container [2023-12-02 20:14:19,820 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 08:14:19" (3/3) ... [2023-12-02 20:14:19,822 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr.8_overflow.ufo.UNBOUNDED.pals.c [2023-12-02 20:14:19,840 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-02 20:14:19,840 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-02 20:14:19,898 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-02 20:14:19,904 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;@292f7aad, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-02 20:14:19,905 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-02 20:14:19,910 INFO L276 IsEmpty]: Start isEmpty. Operand has 126 states, 124 states have (on average 1.8306451612903225) internal successors, (227), 125 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 20:14:19,918 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:19,919 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:19,920 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:19,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:19,925 INFO L85 PathProgramCache]: Analyzing trace with hash -675569035, now seen corresponding path program 1 times [2023-12-02 20:14:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:19,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71719558] [2023-12-02 20:14:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:19,939 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 [2023-12-02 20:14:19,939 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:19,940 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:19,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:20,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-02 20:14:20,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:20,113 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:20,114 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:20,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71719558] [2023-12-02 20:14:20,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71719558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:20,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:20,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-02 20:14:20,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300435206] [2023-12-02 20:14:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:20,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-02 20:14:20,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:20,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-02 20:14:20,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 20:14:20,146 INFO L87 Difference]: Start difference. First operand has 126 states, 124 states have (on average 1.8306451612903225) internal successors, (227), 125 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:20,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:20,184 INFO L93 Difference]: Finished difference Result 186 states and 327 transitions. [2023-12-02 20:14:20,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-02 20:14:20,187 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 20:14:20,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:20,195 INFO L225 Difference]: With dead ends: 186 [2023-12-02 20:14:20,195 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 20:14:20,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-02 20:14:20,201 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:20,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 219 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:20,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 20:14:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-02 20:14:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.8048780487804879) internal successors, (222), 123 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 222 transitions. [2023-12-02 20:14:20,239 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 222 transitions. Word has length 26 [2023-12-02 20:14:20,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:20,240 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 222 transitions. [2023-12-02 20:14:20,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:20,240 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 222 transitions. [2023-12-02 20:14:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-02 20:14:20,242 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:20,242 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:20,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:20,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:20,443 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:20,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1813959927, now seen corresponding path program 1 times [2023-12-02 20:14:20,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:20,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [150504494] [2023-12-02 20:14:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:20,445 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 [2023-12-02 20:14:20,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:20,448 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:20,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:20,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 20:14:20,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:20,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:20,655 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:20,656 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [150504494] [2023-12-02 20:14:20,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [150504494] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:20,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:20,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:14:20,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025012484] [2023-12-02 20:14:20,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:20,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:14:20,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:20,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:14:20,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:14:20,663 INFO L87 Difference]: Start difference. First operand 124 states and 222 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:20,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:20,794 INFO L93 Difference]: Finished difference Result 186 states and 321 transitions. [2023-12-02 20:14:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:14:20,795 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-12-02 20:14:20,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:20,796 INFO L225 Difference]: With dead ends: 186 [2023-12-02 20:14:20,797 INFO L226 Difference]: Without dead ends: 124 [2023-12-02 20:14:20,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:14:20,799 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 0 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:20,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 593 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:14:20,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-12-02 20:14:20,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2023-12-02 20:14:20,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3089430894308942) internal successors, (161), 123 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:20,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 161 transitions. [2023-12-02 20:14:20,810 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 161 transitions. Word has length 26 [2023-12-02 20:14:20,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:20,810 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 161 transitions. [2023-12-02 20:14:20,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:20,811 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 161 transitions. [2023-12-02 20:14:20,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-02 20:14:20,814 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:20,814 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:20,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:21,018 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:21,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2084592409, now seen corresponding path program 1 times [2023-12-02 20:14:21,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:21,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [541489770] [2023-12-02 20:14:21,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:21,020 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 [2023-12-02 20:14:21,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:21,022 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:21,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (4)] Waiting until timeout for monitored process [2023-12-02 20:14:21,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:21,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:14:21,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:23,492 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:23,492 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:23,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [541489770] [2023-12-02 20:14:23,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [541489770] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:23,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:23,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-12-02 20:14:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265566059] [2023-12-02 20:14:23,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:23,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:14:23,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:23,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:14:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:14:23,496 INFO L87 Difference]: Start difference. First operand 124 states and 161 transitions. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:24,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:24,031 INFO L93 Difference]: Finished difference Result 655 states and 1025 transitions. [2023-12-02 20:14:24,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:14:24,033 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 86 [2023-12-02 20:14:24,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:24,038 INFO L225 Difference]: With dead ends: 655 [2023-12-02 20:14:24,038 INFO L226 Difference]: Without dead ends: 596 [2023-12-02 20:14:24,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2023-12-02 20:14:24,041 INFO L413 NwaCegarLoop]: 155 mSDtfsCounter, 798 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 1531 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:24,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [798 Valid, 1531 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-02 20:14:24,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2023-12-02 20:14:24,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 238. [2023-12-02 20:14:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.4683544303797469) internal successors, (348), 237 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:24,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 348 transitions. [2023-12-02 20:14:24,071 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 348 transitions. Word has length 86 [2023-12-02 20:14:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:24,071 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 348 transitions. [2023-12-02 20:14:24,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:24,072 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 348 transitions. [2023-12-02 20:14:24,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-12-02 20:14:24,075 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:24,076 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:24,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (4)] Ended with exit code 0 [2023-12-02 20:14:24,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:24,276 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:24,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:24,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1695805079, now seen corresponding path program 1 times [2023-12-02 20:14:24,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:24,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1673906897] [2023-12-02 20:14:24,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:24,278 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 [2023-12-02 20:14:24,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:24,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:24,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Waiting until timeout for monitored process [2023-12-02 20:14:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:24,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:24,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:24,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:24,557 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:24,557 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:24,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1673906897] [2023-12-02 20:14:24,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1673906897] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:24,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:24,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:24,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332059743] [2023-12-02 20:14:24,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:24,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:24,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:24,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:24,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:24,560 INFO L87 Difference]: Start difference. First operand 238 states and 348 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:24,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:24,600 INFO L93 Difference]: Finished difference Result 568 states and 886 transitions. [2023-12-02 20:14:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:24,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-12-02 20:14:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:24,604 INFO L225 Difference]: With dead ends: 568 [2023-12-02 20:14:24,604 INFO L226 Difference]: Without dead ends: 395 [2023-12-02 20:14:24,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:24,607 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 66 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:24,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 247 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:24,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-12-02 20:14:24,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 393. [2023-12-02 20:14:24,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 392 states have (on average 1.5229591836734695) internal successors, (597), 392 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:24,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 597 transitions. [2023-12-02 20:14:24,630 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 597 transitions. Word has length 88 [2023-12-02 20:14:24,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:24,630 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 597 transitions. [2023-12-02 20:14:24,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:24,631 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 597 transitions. [2023-12-02 20:14:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-12-02 20:14:24,634 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:24,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:24,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 20:14:24,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:24,837 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:24,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:24,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1082771095, now seen corresponding path program 1 times [2023-12-02 20:14:24,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:24,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1501828599] [2023-12-02 20:14:24,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:24,838 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 [2023-12-02 20:14:24,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:24,839 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:24,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:24,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-02 20:14:24,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:25,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:25,013 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:25,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:25,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1501828599] [2023-12-02 20:14:25,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1501828599] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:25,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:25,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-02 20:14:25,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379371829] [2023-12-02 20:14:25,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:25,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-02 20:14:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-02 20:14:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:14:25,017 INFO L87 Difference]: Start difference. First operand 393 states and 597 transitions. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:25,079 INFO L93 Difference]: Finished difference Result 407 states and 614 transitions. [2023-12-02 20:14:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-02 20:14:25,080 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-12-02 20:14:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:25,083 INFO L225 Difference]: With dead ends: 407 [2023-12-02 20:14:25,083 INFO L226 Difference]: Without dead ends: 405 [2023-12-02 20:14:25,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-02 20:14:25,085 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 1 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:25,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 463 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:14:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-12-02 20:14:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 401. [2023-12-02 20:14:25,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 400 states have (on average 1.51) internal successors, (604), 400 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:25,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 604 transitions. [2023-12-02 20:14:25,103 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 604 transitions. Word has length 89 [2023-12-02 20:14:25,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:25,103 INFO L495 AbstractCegarLoop]: Abstraction has 401 states and 604 transitions. [2023-12-02 20:14:25,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:25,104 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 604 transitions. [2023-12-02 20:14:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:25,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:25,106 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:25,117 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 20:14:25,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:25,317 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:25,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:25,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2123044207, now seen corresponding path program 1 times [2023-12-02 20:14:25,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:25,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [975510259] [2023-12-02 20:14:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:25,318 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 [2023-12-02 20:14:25,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:25,319 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:25,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (7)] Waiting until timeout for monitored process [2023-12-02 20:14:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:25,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:25,428 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:25,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:25,522 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:25,522 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:25,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [975510259] [2023-12-02 20:14:25,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [975510259] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:25,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:25,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:25,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250916621] [2023-12-02 20:14:25,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:25,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:25,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:25,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:25,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:25,525 INFO L87 Difference]: Start difference. First operand 401 states and 604 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:25,557 INFO L93 Difference]: Finished difference Result 749 states and 1164 transitions. [2023-12-02 20:14:25,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:25,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:25,561 INFO L225 Difference]: With dead ends: 749 [2023-12-02 20:14:25,561 INFO L226 Difference]: Without dead ends: 570 [2023-12-02 20:14:25,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:25,563 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 86 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:25,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 334 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-12-02 20:14:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 568. [2023-12-02 20:14:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 1.5343915343915344) internal successors, (870), 567 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:25,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 870 transitions. [2023-12-02 20:14:25,578 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 870 transitions. Word has length 90 [2023-12-02 20:14:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:25,578 INFO L495 AbstractCegarLoop]: Abstraction has 568 states and 870 transitions. [2023-12-02 20:14:25,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:25,579 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 870 transitions. [2023-12-02 20:14:25,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:25,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:25,580 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:25,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (7)] Ended with exit code 0 [2023-12-02 20:14:25,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:25,780 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:25,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:25,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2097310609, now seen corresponding path program 1 times [2023-12-02 20:14:25,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:25,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [66791143] [2023-12-02 20:14:25,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:25,782 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 [2023-12-02 20:14:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:25,783 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:25,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (8)] Waiting until timeout for monitored process [2023-12-02 20:14:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:25,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:25,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:26,014 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:26,014 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:26,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [66791143] [2023-12-02 20:14:26,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [66791143] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:26,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:26,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858248362] [2023-12-02 20:14:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:26,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:26,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:26,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:26,017 INFO L87 Difference]: Start difference. First operand 568 states and 870 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:26,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:26,056 INFO L93 Difference]: Finished difference Result 1534 states and 2413 transitions. [2023-12-02 20:14:26,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:26,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:26,063 INFO L225 Difference]: With dead ends: 1534 [2023-12-02 20:14:26,063 INFO L226 Difference]: Without dead ends: 1033 [2023-12-02 20:14:26,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:26,065 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 84 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:26,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 340 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:26,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2023-12-02 20:14:26,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 1031. [2023-12-02 20:14:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1031 states, 1030 states have (on average 1.5533980582524272) internal successors, (1600), 1030 states have internal predecessors, (1600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1600 transitions. [2023-12-02 20:14:26,107 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1600 transitions. Word has length 90 [2023-12-02 20:14:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:26,107 INFO L495 AbstractCegarLoop]: Abstraction has 1031 states and 1600 transitions. [2023-12-02 20:14:26,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1600 transitions. [2023-12-02 20:14:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:26,109 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:26,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:26,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (8)] Ended with exit code 0 [2023-12-02 20:14:26,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:26,310 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:26,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:26,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1341926545, now seen corresponding path program 1 times [2023-12-02 20:14:26,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:26,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [871278013] [2023-12-02 20:14:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:26,311 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 [2023-12-02 20:14:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:26,311 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:26,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:26,442 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:26,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:26,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:26,538 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:26,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [871278013] [2023-12-02 20:14:26,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [871278013] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:26,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:26,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791303308] [2023-12-02 20:14:26,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:26,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:26,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:26,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:26,541 INFO L87 Difference]: Start difference. First operand 1031 states and 1600 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:26,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:26,592 INFO L93 Difference]: Finished difference Result 2887 states and 4540 transitions. [2023-12-02 20:14:26,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:26,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:26,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:26,604 INFO L225 Difference]: With dead ends: 2887 [2023-12-02 20:14:26,604 INFO L226 Difference]: Without dead ends: 1923 [2023-12-02 20:14:26,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:26,606 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 82 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:26,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 342 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:26,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1923 states. [2023-12-02 20:14:26,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1923 to 1921. [2023-12-02 20:14:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1921 states, 1920 states have (on average 1.55625) internal successors, (2988), 1920 states have internal predecessors, (2988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:26,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1921 states to 1921 states and 2988 transitions. [2023-12-02 20:14:26,668 INFO L78 Accepts]: Start accepts. Automaton has 1921 states and 2988 transitions. Word has length 90 [2023-12-02 20:14:26,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:26,668 INFO L495 AbstractCegarLoop]: Abstraction has 1921 states and 2988 transitions. [2023-12-02 20:14:26,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:26,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1921 states and 2988 transitions. [2023-12-02 20:14:26,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:26,669 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:26,670 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:26,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 20:14:26,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:26,870 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:26,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:26,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1752313233, now seen corresponding path program 1 times [2023-12-02 20:14:26,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:26,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723209545] [2023-12-02 20:14:26,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:26,871 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 [2023-12-02 20:14:26,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:26,872 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:26,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Waiting until timeout for monitored process [2023-12-02 20:14:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:26,986 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:26,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:27,071 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:27,071 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:27,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723209545] [2023-12-02 20:14:27,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723209545] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:27,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:27,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:27,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417918760] [2023-12-02 20:14:27,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:27,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:27,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:27,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:27,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:27,074 INFO L87 Difference]: Start difference. First operand 1921 states and 2988 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:27,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:27,157 INFO L93 Difference]: Finished difference Result 5485 states and 8578 transitions. [2023-12-02 20:14:27,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:27,158 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:27,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:27,178 INFO L225 Difference]: With dead ends: 5485 [2023-12-02 20:14:27,178 INFO L226 Difference]: Without dead ends: 3631 [2023-12-02 20:14:27,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:27,182 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 80 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:27,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 344 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2023-12-02 20:14:27,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3629. [2023-12-02 20:14:27,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 1.5490628445424477) internal successors, (5620), 3628 states have internal predecessors, (5620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:27,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 5620 transitions. [2023-12-02 20:14:27,300 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 5620 transitions. Word has length 90 [2023-12-02 20:14:27,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:27,300 INFO L495 AbstractCegarLoop]: Abstraction has 3629 states and 5620 transitions. [2023-12-02 20:14:27,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:27,300 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 5620 transitions. [2023-12-02 20:14:27,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:27,301 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:27,302 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:27,305 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 20:14:27,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:27,502 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:27,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:27,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1980952465, now seen corresponding path program 1 times [2023-12-02 20:14:27,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:27,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23622295] [2023-12-02 20:14:27,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:27,504 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 [2023-12-02 20:14:27,504 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:27,505 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:27,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (11)] Waiting until timeout for monitored process [2023-12-02 20:14:27,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:27,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:27,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:27,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:27,724 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:27,725 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:27,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23622295] [2023-12-02 20:14:27,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23622295] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:27,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:27,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:27,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308293109] [2023-12-02 20:14:27,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:27,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:27,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:27,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:27,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:27,727 INFO L87 Difference]: Start difference. First operand 3629 states and 5620 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:27,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:27,860 INFO L93 Difference]: Finished difference Result 10465 states and 16222 transitions. [2023-12-02 20:14:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:27,861 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:27,897 INFO L225 Difference]: With dead ends: 10465 [2023-12-02 20:14:27,897 INFO L226 Difference]: Without dead ends: 6903 [2023-12-02 20:14:27,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:27,903 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 76 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:27,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 340 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:27,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6903 states. [2023-12-02 20:14:28,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6903 to 6901. [2023-12-02 20:14:28,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6901 states, 6900 states have (on average 1.5356521739130435) internal successors, (10596), 6900 states have internal predecessors, (10596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:28,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6901 states to 6901 states and 10596 transitions. [2023-12-02 20:14:28,137 INFO L78 Accepts]: Start accepts. Automaton has 6901 states and 10596 transitions. Word has length 90 [2023-12-02 20:14:28,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:28,137 INFO L495 AbstractCegarLoop]: Abstraction has 6901 states and 10596 transitions. [2023-12-02 20:14:28,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:28,137 INFO L276 IsEmpty]: Start isEmpty. Operand 6901 states and 10596 transitions. [2023-12-02 20:14:28,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:28,138 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:28,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:28,141 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (11)] Ended with exit code 0 [2023-12-02 20:14:28,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:28,339 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:28,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:28,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1688358767, now seen corresponding path program 1 times [2023-12-02 20:14:28,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:28,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [201663231] [2023-12-02 20:14:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:28,340 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 [2023-12-02 20:14:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:28,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:28,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:28,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:28,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:28,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:28,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:28,539 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:28,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [201663231] [2023-12-02 20:14:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [201663231] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:28,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:28,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168284802] [2023-12-02 20:14:28,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:28,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:28,541 INFO L87 Difference]: Start difference. First operand 6901 states and 10596 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:28,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:28,722 INFO L93 Difference]: Finished difference Result 19993 states and 30646 transitions. [2023-12-02 20:14:28,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:28,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:28,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:28,788 INFO L225 Difference]: With dead ends: 19993 [2023-12-02 20:14:28,788 INFO L226 Difference]: Without dead ends: 13159 [2023-12-02 20:14:28,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:28,799 INFO L413 NwaCegarLoop]: 222 mSDtfsCounter, 74 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:28,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 342 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:28,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13159 states. [2023-12-02 20:14:29,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13159 to 13157. [2023-12-02 20:14:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13157 states, 13156 states have (on average 1.5180906050471268) internal successors, (19972), 13156 states have internal predecessors, (19972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13157 states to 13157 states and 19972 transitions. [2023-12-02 20:14:29,237 INFO L78 Accepts]: Start accepts. Automaton has 13157 states and 19972 transitions. Word has length 90 [2023-12-02 20:14:29,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:29,237 INFO L495 AbstractCegarLoop]: Abstraction has 13157 states and 19972 transitions. [2023-12-02 20:14:29,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 13157 states and 19972 transitions. [2023-12-02 20:14:29,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:29,238 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:29,238 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:29,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 20:14:29,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:29,439 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:29,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:29,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1717875089, now seen corresponding path program 1 times [2023-12-02 20:14:29,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:29,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1141639515] [2023-12-02 20:14:29,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:29,440 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 [2023-12-02 20:14:29,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:29,441 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:29,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (13)] Waiting until timeout for monitored process [2023-12-02 20:14:29,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:29,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:29,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:29,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:29,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:29,686 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:29,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1141639515] [2023-12-02 20:14:29,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1141639515] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:29,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:29,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:29,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406348980] [2023-12-02 20:14:29,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:29,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:29,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:29,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:29,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:29,688 INFO L87 Difference]: Start difference. First operand 13157 states and 19972 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:30,187 INFO L93 Difference]: Finished difference Result 38185 states and 57766 transitions. [2023-12-02 20:14:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:30,188 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:30,242 INFO L225 Difference]: With dead ends: 38185 [2023-12-02 20:14:30,242 INFO L226 Difference]: Without dead ends: 25095 [2023-12-02 20:14:30,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:30,258 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 72 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:30,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 344 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:30,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25095 states. [2023-12-02 20:14:30,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25095 to 25093. [2023-12-02 20:14:30,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25093 states, 25092 states have (on average 1.4973696795791487) internal successors, (37572), 25092 states have internal predecessors, (37572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:31,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25093 states to 25093 states and 37572 transitions. [2023-12-02 20:14:31,004 INFO L78 Accepts]: Start accepts. Automaton has 25093 states and 37572 transitions. Word has length 90 [2023-12-02 20:14:31,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:31,005 INFO L495 AbstractCegarLoop]: Abstraction has 25093 states and 37572 transitions. [2023-12-02 20:14:31,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:31,006 INFO L276 IsEmpty]: Start isEmpty. Operand 25093 states and 37572 transitions. [2023-12-02 20:14:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-02 20:14:31,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:31,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:31,009 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (13)] Ended with exit code 0 [2023-12-02 20:14:31,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:31,207 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:31,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:31,207 INFO L85 PathProgramCache]: Analyzing trace with hash -2020896401, now seen corresponding path program 1 times [2023-12-02 20:14:31,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:31,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2028684510] [2023-12-02 20:14:31,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:31,208 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 [2023-12-02 20:14:31,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:31,209 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:31,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Waiting until timeout for monitored process [2023-12-02 20:14:31,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:31,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:31,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:31,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:31,380 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:31,381 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2028684510] [2023-12-02 20:14:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2028684510] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:31,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:31,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:31,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882162364] [2023-12-02 20:14:31,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:31,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:31,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:31,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:31,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:31,382 INFO L87 Difference]: Start difference. First operand 25093 states and 37572 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:31,956 INFO L93 Difference]: Finished difference Result 72841 states and 108550 transitions. [2023-12-02 20:14:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-12-02 20:14:31,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:32,015 INFO L225 Difference]: With dead ends: 72841 [2023-12-02 20:14:32,015 INFO L226 Difference]: Without dead ends: 47815 [2023-12-02 20:14:32,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:32,037 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 78 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:32,037 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 346 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:32,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47815 states. [2023-12-02 20:14:32,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47815 to 47813. [2023-12-02 20:14:32,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47813 states, 47812 states have (on average 1.4738559357483476) internal successors, (70468), 47812 states have internal predecessors, (70468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:32,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47813 states to 47813 states and 70468 transitions. [2023-12-02 20:14:32,904 INFO L78 Accepts]: Start accepts. Automaton has 47813 states and 70468 transitions. Word has length 90 [2023-12-02 20:14:32,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:32,905 INFO L495 AbstractCegarLoop]: Abstraction has 47813 states and 70468 transitions. [2023-12-02 20:14:32,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:32,905 INFO L276 IsEmpty]: Start isEmpty. Operand 47813 states and 70468 transitions. [2023-12-02 20:14:32,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 20:14:32,912 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:32,913 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:32,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:33,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:33,113 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:33,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:33,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1197016696, now seen corresponding path program 1 times [2023-12-02 20:14:33,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:33,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [969246713] [2023-12-02 20:14:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:33,115 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 [2023-12-02 20:14:33,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:33,116 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:33,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:33,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:14:33,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:34,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:35,038 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:35,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [969246713] [2023-12-02 20:14:35,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [969246713] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:35,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [551725990] [2023-12-02 20:14:35,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:35,039 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:35,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:35,040 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:35,045 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2023-12-02 20:14:35,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:35,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:35,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:35,301 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:35,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:35,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [551725990] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:35,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:35,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [9, 8] total 17 [2023-12-02 20:14:35,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212950538] [2023-12-02 20:14:35,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:35,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:35,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:35,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:35,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:35,304 INFO L87 Difference]: Start difference. First operand 47813 states and 70468 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:35,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:35,960 INFO L93 Difference]: Finished difference Result 95561 states and 140870 transitions. [2023-12-02 20:14:35,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:35,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-02 20:14:35,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:36,007 INFO L225 Difference]: With dead ends: 95561 [2023-12-02 20:14:36,008 INFO L226 Difference]: Without dead ends: 47815 [2023-12-02 20:14:36,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:36,028 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 67 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:36,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 364 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:36,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47815 states. [2023-12-02 20:14:36,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47815 to 47813. [2023-12-02 20:14:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47813 states, 47812 states have (on average 1.4618087509411863) internal successors, (69892), 47812 states have internal predecessors, (69892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:36,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47813 states to 47813 states and 69892 transitions. [2023-12-02 20:14:36,969 INFO L78 Accepts]: Start accepts. Automaton has 47813 states and 69892 transitions. Word has length 114 [2023-12-02 20:14:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:36,970 INFO L495 AbstractCegarLoop]: Abstraction has 47813 states and 69892 transitions. [2023-12-02 20:14:36,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 47813 states and 69892 transitions. [2023-12-02 20:14:36,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-02 20:14:36,974 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:36,974 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:36,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:37,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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)] Ended with exit code 0 [2023-12-02 20:14:37,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:37,375 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:37,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:37,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1122404216, now seen corresponding path program 1 times [2023-12-02 20:14:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:37,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62303189] [2023-12-02 20:14:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:37,376 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 [2023-12-02 20:14:37,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:37,377 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:37,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (17)] Waiting until timeout for monitored process [2023-12-02 20:14:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:37,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 2 conjunts are in the unsatisfiable core [2023-12-02 20:14:37,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:37,534 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:37,535 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:37,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62303189] [2023-12-02 20:14:37,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62303189] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:37,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-02 20:14:37,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-02 20:14:37,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847458013] [2023-12-02 20:14:37,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:37,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:37,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:37,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:37,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:37,536 INFO L87 Difference]: Start difference. First operand 47813 states and 69892 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:37,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:37,931 INFO L93 Difference]: Finished difference Result 64353 states and 94303 transitions. [2023-12-02 20:14:37,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:37,932 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 114 [2023-12-02 20:14:37,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:37,946 INFO L225 Difference]: With dead ends: 64353 [2023-12-02 20:14:37,946 INFO L226 Difference]: Without dead ends: 16607 [2023-12-02 20:14:37,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-12-02 20:14:37,971 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 63 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:37,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 361 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:37,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16607 states. [2023-12-02 20:14:38,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16607 to 16600. [2023-12-02 20:14:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16600 states, 16599 states have (on average 1.462678474606904) internal successors, (24279), 16599 states have internal predecessors, (24279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16600 states to 16600 states and 24279 transitions. [2023-12-02 20:14:38,412 INFO L78 Accepts]: Start accepts. Automaton has 16600 states and 24279 transitions. Word has length 114 [2023-12-02 20:14:38,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:38,412 INFO L495 AbstractCegarLoop]: Abstraction has 16600 states and 24279 transitions. [2023-12-02 20:14:38,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 16600 states and 24279 transitions. [2023-12-02 20:14:38,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-12-02 20:14:38,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:38,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:38,417 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (17)] Ended with exit code 0 [2023-12-02 20:14:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:38,615 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:38,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:38,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1709342874, now seen corresponding path program 1 times [2023-12-02 20:14:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:38,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [30994168] [2023-12-02 20:14:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:38,616 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 [2023-12-02 20:14:38,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:38,617 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:38,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (18)] Waiting until timeout for monitored process [2023-12-02 20:14:38,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:38,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:38,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:39,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:39,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:39,934 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:39,934 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:39,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [30994168] [2023-12-02 20:14:39,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [30994168] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1779956143] [2023-12-02 20:14:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:39,935 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:39,935 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:39,936 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:39,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2023-12-02 20:14:40,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:40,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:40,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:40,136 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:40,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:40,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1779956143] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:40,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:40,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 20:14:40,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120801274] [2023-12-02 20:14:40,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:40,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:40,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:40,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:40,139 INFO L87 Difference]: Start difference. First operand 16600 states and 24279 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:40,307 INFO L93 Difference]: Finished difference Result 24860 states and 36377 transitions. [2023-12-02 20:14:40,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:40,307 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-12-02 20:14:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:40,313 INFO L225 Difference]: With dead ends: 24860 [2023-12-02 20:14:40,313 INFO L226 Difference]: Without dead ends: 8346 [2023-12-02 20:14:40,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:40,319 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 63 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:40,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 340 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-02 20:14:40,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8346 states. [2023-12-02 20:14:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8346 to 8344. [2023-12-02 20:14:40,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8344 states, 8343 states have (on average 1.4487594390507013) internal successors, (12087), 8343 states have internal predecessors, (12087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:40,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8344 states to 8344 states and 12087 transitions. [2023-12-02 20:14:40,423 INFO L78 Accepts]: Start accepts. Automaton has 8344 states and 12087 transitions. Word has length 116 [2023-12-02 20:14:40,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:40,423 INFO L495 AbstractCegarLoop]: Abstraction has 8344 states and 12087 transitions. [2023-12-02 20:14:40,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:40,423 INFO L276 IsEmpty]: Start isEmpty. Operand 8344 states and 12087 transitions. [2023-12-02 20:14:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-02 20:14:40,424 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:40,425 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:40,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2023-12-02 20:14:40,627 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (18)] Ended with exit code 0 [2023-12-02 20:14:40,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:40,825 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:40,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:40,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1150027308, now seen corresponding path program 1 times [2023-12-02 20:14:40,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:40,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820360119] [2023-12-02 20:14:40,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:40,827 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 [2023-12-02 20:14:40,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:40,827 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:40,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (20)] Waiting until timeout for monitored process [2023-12-02 20:14:40,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:40,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:40,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:41,560 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:42,036 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:42,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820360119] [2023-12-02 20:14:42,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820360119] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:42,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [268413451] [2023-12-02 20:14:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:42,037 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:42,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:42,038 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:42,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2023-12-02 20:14:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:42,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:42,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:42,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:42,281 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:42,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [268413451] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:42,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:42,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 20:14:42,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717893600] [2023-12-02 20:14:42,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:42,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:42,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:42,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:42,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:42,283 INFO L87 Difference]: Start difference. First operand 8344 states and 12087 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:42,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:42,353 INFO L93 Difference]: Finished difference Result 12476 states and 18089 transitions. [2023-12-02 20:14:42,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:42,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2023-12-02 20:14:42,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:42,356 INFO L225 Difference]: With dead ends: 12476 [2023-12-02 20:14:42,356 INFO L226 Difference]: Without dead ends: 4218 [2023-12-02 20:14:42,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 336 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:42,359 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 60 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:42,360 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 325 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:42,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4218 states. [2023-12-02 20:14:42,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4218 to 4216. [2023-12-02 20:14:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4216 states, 4215 states have (on average 1.4327402135231317) internal successors, (6039), 4215 states have internal predecessors, (6039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:42,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4216 states to 4216 states and 6039 transitions. [2023-12-02 20:14:42,412 INFO L78 Accepts]: Start accepts. Automaton has 4216 states and 6039 transitions. Word has length 118 [2023-12-02 20:14:42,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:42,412 INFO L495 AbstractCegarLoop]: Abstraction has 4216 states and 6039 transitions. [2023-12-02 20:14:42,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4216 states and 6039 transitions. [2023-12-02 20:14:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-12-02 20:14:42,414 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:42,414 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:42,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:42,619 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (20)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:42,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:42,817 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:42,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:42,817 INFO L85 PathProgramCache]: Analyzing trace with hash 230730302, now seen corresponding path program 1 times [2023-12-02 20:14:42,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:42,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [540220932] [2023-12-02 20:14:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:42,817 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 [2023-12-02 20:14:42,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:42,818 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:42,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (22)] Waiting until timeout for monitored process [2023-12-02 20:14:42,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:42,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:42,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:43,588 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:43,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:44,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [540220932] [2023-12-02 20:14:44,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [540220932] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:44,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [980498067] [2023-12-02 20:14:44,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:44,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:44,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:44,002 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:44,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2023-12-02 20:14:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:44,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:44,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:44,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:44,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [980498067] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:44,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:44,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 20:14:44,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472439527] [2023-12-02 20:14:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:44,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:44,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:44,246 INFO L87 Difference]: Start difference. First operand 4216 states and 6039 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:44,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:44,316 INFO L93 Difference]: Finished difference Result 6284 states and 9017 transitions. [2023-12-02 20:14:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:44,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-12-02 20:14:44,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:44,320 INFO L225 Difference]: With dead ends: 6284 [2023-12-02 20:14:44,320 INFO L226 Difference]: Without dead ends: 2154 [2023-12-02 20:14:44,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 342 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:44,323 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 57 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:44,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 310 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2154 states. [2023-12-02 20:14:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2154 to 2152. [2023-12-02 20:14:44,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 1.412831241283124) internal successors, (3039), 2151 states have internal predecessors, (3039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:44,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 3039 transitions. [2023-12-02 20:14:44,390 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 3039 transitions. Word has length 120 [2023-12-02 20:14:44,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:44,390 INFO L495 AbstractCegarLoop]: Abstraction has 2152 states and 3039 transitions. [2023-12-02 20:14:44,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:44,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 3039 transitions. [2023-12-02 20:14:44,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-02 20:14:44,392 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:44,392 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:44,395 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (22)] Ended with exit code 0 [2023-12-02 20:14:44,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2023-12-02 20:14:44,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:44,793 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:44,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:44,793 INFO L85 PathProgramCache]: Analyzing trace with hash -242905904, now seen corresponding path program 1 times [2023-12-02 20:14:44,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:44,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056627203] [2023-12-02 20:14:44,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:44,794 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 [2023-12-02 20:14:44,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:44,795 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (24)] Waiting until timeout for monitored process [2023-12-02 20:14:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:44,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:44,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:45,510 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:45,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:45,929 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:45,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056627203] [2023-12-02 20:14:45,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056627203] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:45,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [966518589] [2023-12-02 20:14:45,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:45,929 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:45,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:45,930 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:45,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2023-12-02 20:14:46,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:46,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:46,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:46,131 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:46,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [966518589] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:46,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:46,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 20:14:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647913582] [2023-12-02 20:14:46,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:46,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:46,133 INFO L87 Difference]: Start difference. First operand 2152 states and 3039 transitions. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:46,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:46,163 INFO L93 Difference]: Finished difference Result 3188 states and 4517 transitions. [2023-12-02 20:14:46,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:46,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2023-12-02 20:14:46,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:46,165 INFO L225 Difference]: With dead ends: 3188 [2023-12-02 20:14:46,165 INFO L226 Difference]: Without dead ends: 1122 [2023-12-02 20:14:46,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 348 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:46,166 INFO L413 NwaCegarLoop]: 187 mSDtfsCounter, 54 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:46,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 295 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2023-12-02 20:14:46,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 1120. [2023-12-02 20:14:46,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1119 states have (on average 1.386058981233244) internal successors, (1551), 1119 states have internal predecessors, (1551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:46,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1551 transitions. [2023-12-02 20:14:46,180 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1551 transitions. Word has length 122 [2023-12-02 20:14:46,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:46,181 INFO L495 AbstractCegarLoop]: Abstraction has 1120 states and 1551 transitions. [2023-12-02 20:14:46,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:46,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1551 transitions. [2023-12-02 20:14:46,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-12-02 20:14:46,181 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:46,181 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:46,184 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:46,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (24)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:46,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:46,582 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:46,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:46,582 INFO L85 PathProgramCache]: Analyzing trace with hash 253083874, now seen corresponding path program 1 times [2023-12-02 20:14:46,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:46,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1223953294] [2023-12-02 20:14:46,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:46,583 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 [2023-12-02 20:14:46,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:46,584 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:46,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (26)] Waiting until timeout for monitored process [2023-12-02 20:14:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:46,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:46,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:47,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:47,777 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:47,777 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:47,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1223953294] [2023-12-02 20:14:47,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1223953294] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:47,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1999110808] [2023-12-02 20:14:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:47,777 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:47,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:47,778 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:47,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2023-12-02 20:14:47,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:47,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:47,958 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:48,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:48,015 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:48,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1999110808] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:48,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:48,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 20:14:48,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969791548] [2023-12-02 20:14:48,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:48,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:48,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:48,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:48,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:48,017 INFO L87 Difference]: Start difference. First operand 1120 states and 1551 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:48,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:48,043 INFO L93 Difference]: Finished difference Result 1640 states and 2285 transitions. [2023-12-02 20:14:48,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:48,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-12-02 20:14:48,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:48,044 INFO L225 Difference]: With dead ends: 1640 [2023-12-02 20:14:48,045 INFO L226 Difference]: Without dead ends: 606 [2023-12-02 20:14:48,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:48,046 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 51 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:48,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 280 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:48,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-12-02 20:14:48,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 604. [2023-12-02 20:14:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.3482587064676617) internal successors, (813), 603 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:48,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 813 transitions. [2023-12-02 20:14:48,059 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 813 transitions. Word has length 124 [2023-12-02 20:14:48,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:48,059 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 813 transitions. [2023-12-02 20:14:48,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:48,060 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 813 transitions. [2023-12-02 20:14:48,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-02 20:14:48,060 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:48,060 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:48,062 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2023-12-02 20:14:48,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (26)] Forceful destruction successful, exit code 0 [2023-12-02 20:14:48,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:48,461 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:48,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:48,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1993837708, now seen corresponding path program 1 times [2023-12-02 20:14:48,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:48,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147562624] [2023-12-02 20:14:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:48,462 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 [2023-12-02 20:14:48,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:48,463 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:48,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (28)] Waiting until timeout for monitored process [2023-12-02 20:14:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:48,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:48,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:49,266 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:49,266 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:49,759 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147562624] [2023-12-02 20:14:49,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147562624] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1600037515] [2023-12-02 20:14:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:49,759 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:49,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:49,760 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:49,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2023-12-02 20:14:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:49,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-02 20:14:49,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:49,979 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:49,979 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:49,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1600037515] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:49,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:49,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 8] total 17 [2023-12-02 20:14:49,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354544350] [2023-12-02 20:14:49,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:49,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-12-02 20:14:49,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:49,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-12-02 20:14:49,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:49,982 INFO L87 Difference]: Start difference. First operand 604 states and 813 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:50,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:50,004 INFO L93 Difference]: Finished difference Result 866 states and 1178 transitions. [2023-12-02 20:14:50,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-02 20:14:50,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2023-12-02 20:14:50,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:50,005 INFO L225 Difference]: With dead ends: 866 [2023-12-02 20:14:50,005 INFO L226 Difference]: Without dead ends: 348 [2023-12-02 20:14:50,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-12-02 20:14:50,006 INFO L413 NwaCegarLoop]: 173 mSDtfsCounter, 48 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:50,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 265 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-02 20:14:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-12-02 20:14:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 346. [2023-12-02 20:14:50,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.2956521739130435) internal successors, (447), 345 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:50,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 447 transitions. [2023-12-02 20:14:50,015 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 447 transitions. Word has length 126 [2023-12-02 20:14:50,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:50,015 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 447 transitions. [2023-12-02 20:14:50,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 447 transitions. [2023-12-02 20:14:50,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:14:50,016 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:50,016 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:50,019 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (28)] Ended with exit code 0 [2023-12-02 20:14:50,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (29)] Ended with exit code 0 [2023-12-02 20:14:50,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:50,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:50,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash 363512966, now seen corresponding path program 1 times [2023-12-02 20:14:50,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:50,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1560607388] [2023-12-02 20:14:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:50,418 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 [2023-12-02 20:14:50,418 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:50,419 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:50,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (30)] Waiting until timeout for monitored process [2023-12-02 20:14:50,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:50,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:50,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:51,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:51,721 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1560607388] [2023-12-02 20:14:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1560607388] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1744313911] [2023-12-02 20:14:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:51,721 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:51,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:51,722 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:51,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2023-12-02 20:14:51,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:51,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:14:51,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-12-02 20:14:54,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:54,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1744313911] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:54,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:54,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:14:54,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094552980] [2023-12-02 20:14:54,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:54,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:14:54,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:54,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:14:54,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:14:54,614 INFO L87 Difference]: Start difference. First operand 346 states and 447 transitions. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:54,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:54,955 INFO L93 Difference]: Finished difference Result 1138 states and 1548 transitions. [2023-12-02 20:14:54,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:14:54,957 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:14:54,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:54,958 INFO L225 Difference]: With dead ends: 1138 [2023-12-02 20:14:54,958 INFO L226 Difference]: Without dead ends: 1050 [2023-12-02 20:14:54,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:14:54,959 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1182 mSDsluCounter, 842 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1182 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:54,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1182 Valid, 1085 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:14:54,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2023-12-02 20:14:54,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 518. [2023-12-02 20:14:54,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.3133462282398454) internal successors, (679), 517 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:54,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 679 transitions. [2023-12-02 20:14:54,970 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 679 transitions. Word has length 128 [2023-12-02 20:14:54,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:54,970 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 679 transitions. [2023-12-02 20:14:54,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:54,971 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 679 transitions. [2023-12-02 20:14:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:14:54,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:54,971 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:54,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2023-12-02 20:14:55,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (30)] Ended with exit code 0 [2023-12-02 20:14:55,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:55,372 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:55,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:55,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1912542330, now seen corresponding path program 1 times [2023-12-02 20:14:55,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:55,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425016170] [2023-12-02 20:14:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:55,373 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 [2023-12-02 20:14:55,373 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:14:55,374 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:14:55,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (32)] Waiting until timeout for monitored process [2023-12-02 20:14:55,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:55,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:14:55,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:56,105 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:56,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:14:56,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:14:56,573 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:14:56,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425016170] [2023-12-02 20:14:56,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425016170] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:14:56,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [505297246] [2023-12-02 20:14:56,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:14:56,574 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:14:56,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:14:56,575 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:14:56,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2023-12-02 20:14:56,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:14:56,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:14:56,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:14:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-02 20:14:59,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:14:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [505297246] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:14:59,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:14:59,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:14:59,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903094556] [2023-12-02 20:14:59,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:14:59,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:14:59,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:14:59,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:14:59,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:14:59,215 INFO L87 Difference]: Start difference. First operand 518 states and 679 transitions. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:14:59,587 INFO L93 Difference]: Finished difference Result 1224 states and 1664 transitions. [2023-12-02 20:14:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:14:59,587 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:14:59,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:14:59,588 INFO L225 Difference]: With dead ends: 1224 [2023-12-02 20:14:59,588 INFO L226 Difference]: Without dead ends: 964 [2023-12-02 20:14:59,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:14:59,589 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1270 mSDsluCounter, 823 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1270 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:14:59,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1270 Valid, 1066 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:14:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2023-12-02 20:14:59,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 432. [2023-12-02 20:14:59,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 1.2923433874709978) internal successors, (557), 431 states have internal predecessors, (557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 557 transitions. [2023-12-02 20:14:59,597 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 557 transitions. Word has length 128 [2023-12-02 20:14:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:14:59,597 INFO L495 AbstractCegarLoop]: Abstraction has 432 states and 557 transitions. [2023-12-02 20:14:59,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:14:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 557 transitions. [2023-12-02 20:14:59,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:14:59,598 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:14:59,598 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:14:59,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (33)] Ended with exit code 0 [2023-12-02 20:14:59,801 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (32)] Ended with exit code 0 [2023-12-02 20:14:59,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:14:59,999 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:14:59,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:14:59,999 INFO L85 PathProgramCache]: Analyzing trace with hash -683647354, now seen corresponding path program 1 times [2023-12-02 20:14:59,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:14:59,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [347855592] [2023-12-02 20:14:59,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:00,000 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 [2023-12-02 20:15:00,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:00,000 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:00,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (34)] Waiting until timeout for monitored process [2023-12-02 20:15:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:00,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:00,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:00,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:01,196 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:01,196 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [347855592] [2023-12-02 20:15:01,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [347855592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:01,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [853267344] [2023-12-02 20:15:01,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:01,196 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:01,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:01,197 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:01,199 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2023-12-02 20:15:01,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:01,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:01,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:03,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-02 20:15:03,908 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:15:03,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [853267344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:15:03,908 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:15:03,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:15:03,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331289629] [2023-12-02 20:15:03,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:15:03,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:15:03,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:03,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:15:03,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:03,910 INFO L87 Difference]: Start difference. First operand 432 states and 557 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:04,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:04,227 INFO L93 Difference]: Finished difference Result 1138 states and 1542 transitions. [2023-12-02 20:15:04,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:15:04,227 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:15:04,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:04,228 INFO L225 Difference]: With dead ends: 1138 [2023-12-02 20:15:04,228 INFO L226 Difference]: Without dead ends: 1050 [2023-12-02 20:15:04,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:04,229 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 995 mSDsluCounter, 854 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 995 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:04,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [995 Valid, 1097 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:15:04,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1050 states. [2023-12-02 20:15:04,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1050 to 518. [2023-12-02 20:15:04,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.3017408123791103) internal successors, (673), 517 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:04,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 673 transitions. [2023-12-02 20:15:04,240 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 673 transitions. Word has length 128 [2023-12-02 20:15:04,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:04,240 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 673 transitions. [2023-12-02 20:15:04,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 10 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:04,240 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 673 transitions. [2023-12-02 20:15:04,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:15:04,241 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:04,241 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:04,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (34)] Ended with exit code 0 [2023-12-02 20:15:04,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:04,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:04,642 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:04,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:04,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1114746490, now seen corresponding path program 1 times [2023-12-02 20:15:04,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:04,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [299447963] [2023-12-02 20:15:04,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:04,643 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 [2023-12-02 20:15:04,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:04,644 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:04,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (36)] Waiting until timeout for monitored process [2023-12-02 20:15:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:04,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:04,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:05,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:05,744 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:05,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [299447963] [2023-12-02 20:15:05,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [299447963] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:05,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1879130907] [2023-12-02 20:15:05,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:05,744 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:05,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:05,745 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:05,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Waiting until timeout for monitored process [2023-12-02 20:15:05,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:05,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:05,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-02 20:15:08,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:15:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1879130907] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:15:08,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:15:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:15:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452625324] [2023-12-02 20:15:08,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:15:08,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:15:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:15:08,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:08,282 INFO L87 Difference]: Start difference. First operand 518 states and 673 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:08,633 INFO L93 Difference]: Finished difference Result 1224 states and 1658 transitions. [2023-12-02 20:15:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:15:08,634 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:15:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:08,635 INFO L225 Difference]: With dead ends: 1224 [2023-12-02 20:15:08,635 INFO L226 Difference]: Without dead ends: 1136 [2023-12-02 20:15:08,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:08,636 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1008 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1008 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:08,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1008 Valid, 1329 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:15:08,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2023-12-02 20:15:08,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 604. [2023-12-02 20:15:08,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 603 states have (on average 1.308457711442786) internal successors, (789), 603 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:08,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 789 transitions. [2023-12-02 20:15:08,648 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 789 transitions. Word has length 128 [2023-12-02 20:15:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:08,648 INFO L495 AbstractCegarLoop]: Abstraction has 604 states and 789 transitions. [2023-12-02 20:15:08,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:08,649 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 789 transitions. [2023-12-02 20:15:08,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:15:08,649 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:08,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:08,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (37)] Ended with exit code 0 [2023-12-02 20:15:08,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (36)] Ended with exit code 0 [2023-12-02 20:15:09,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:15:09,050 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:09,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:09,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1414903686, now seen corresponding path program 1 times [2023-12-02 20:15:09,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:09,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827197142] [2023-12-02 20:15:09,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:09,051 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 [2023-12-02 20:15:09,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:09,052 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:09,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (38)] Waiting until timeout for monitored process [2023-12-02 20:15:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:09,170 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:09,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:09,723 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:09,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:10,127 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:10,128 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827197142] [2023-12-02 20:15:10,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827197142] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:10,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1819568385] [2023-12-02 20:15:10,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:10,128 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:10,128 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:10,129 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:10,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2023-12-02 20:15:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:10,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:10,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-02 20:15:12,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:15:12,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1819568385] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:15:12,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:15:12,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:15:12,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607745568] [2023-12-02 20:15:12,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:15:12,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:15:12,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:12,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:15:12,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:12,840 INFO L87 Difference]: Start difference. First operand 604 states and 789 transitions. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:13,179 INFO L93 Difference]: Finished difference Result 1310 states and 1774 transitions. [2023-12-02 20:15:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:15:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:15:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:13,181 INFO L225 Difference]: With dead ends: 1310 [2023-12-02 20:15:13,181 INFO L226 Difference]: Without dead ends: 1222 [2023-12-02 20:15:13,181 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:13,181 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 782 mSDsluCounter, 955 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:13,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 1198 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:15:13,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2023-12-02 20:15:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 690. [2023-12-02 20:15:13,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 689 states have (on average 1.3134978229317853) internal successors, (905), 689 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 905 transitions. [2023-12-02 20:15:13,195 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 905 transitions. Word has length 128 [2023-12-02 20:15:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:13,195 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 905 transitions. [2023-12-02 20:15:13,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:13,196 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 905 transitions. [2023-12-02 20:15:13,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:15:13,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:13,196 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:13,198 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (39)] Ended with exit code 0 [2023-12-02 20:15:13,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (38)] Ended with exit code 0 [2023-12-02 20:15:13,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:15:13,597 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:13,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:13,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1907414394, now seen corresponding path program 1 times [2023-12-02 20:15:13,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:13,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085216295] [2023-12-02 20:15:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:13,598 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 [2023-12-02 20:15:13,598 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:13,599 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:13,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (40)] Waiting until timeout for monitored process [2023-12-02 20:15:13,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:13,716 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:13,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:14,258 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:14,258 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:14,664 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085216295] [2023-12-02 20:15:14,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085216295] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:14,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [532857733] [2023-12-02 20:15:14,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:14,664 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:14,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:14,665 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:14,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Waiting until timeout for monitored process [2023-12-02 20:15:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:14,854 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:14,856 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:17,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-02 20:15:17,242 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:15:17,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [532857733] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:15:17,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:15:17,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:15:17,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771518439] [2023-12-02 20:15:17,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:15:17,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:15:17,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:17,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:15:17,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:17,244 INFO L87 Difference]: Start difference. First operand 690 states and 905 transitions. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:17,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:17,537 INFO L93 Difference]: Finished difference Result 1396 states and 1890 transitions. [2023-12-02 20:15:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:15:17,538 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:15:17,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:17,539 INFO L225 Difference]: With dead ends: 1396 [2023-12-02 20:15:17,539 INFO L226 Difference]: Without dead ends: 1308 [2023-12-02 20:15:17,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:17,540 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 962 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 962 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:17,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [962 Valid, 1171 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:15:17,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2023-12-02 20:15:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 776. [2023-12-02 20:15:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 1.3174193548387096) internal successors, (1021), 775 states have internal predecessors, (1021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1021 transitions. [2023-12-02 20:15:17,557 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1021 transitions. Word has length 128 [2023-12-02 20:15:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:17,557 INFO L495 AbstractCegarLoop]: Abstraction has 776 states and 1021 transitions. [2023-12-02 20:15:17,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1021 transitions. [2023-12-02 20:15:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:15:17,558 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:17,558 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:17,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (41)] Ended with exit code 0 [2023-12-02 20:15:17,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (40)] Ended with exit code 0 [2023-12-02 20:15:17,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:15:17,959 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:17,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:17,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2018975110, now seen corresponding path program 1 times [2023-12-02 20:15:17,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:17,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [899138297] [2023-12-02 20:15:17,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:17,960 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 [2023-12-02 20:15:17,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:17,961 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:17,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (42)] Waiting until timeout for monitored process [2023-12-02 20:15:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:18,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:18,088 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:18,596 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:18,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:19,001 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:19,001 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [899138297] [2023-12-02 20:15:19,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [899138297] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:19,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1210309384] [2023-12-02 20:15:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:19,001 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:19,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:19,002 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:19,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Waiting until timeout for monitored process [2023-12-02 20:15:19,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:19,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:19,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:21,611 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-02 20:15:21,611 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:15:21,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1210309384] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:15:21,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:15:21,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [8, 8] total 24 [2023-12-02 20:15:21,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896004742] [2023-12-02 20:15:21,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:15:21,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:15:21,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:21,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:15:21,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:21,613 INFO L87 Difference]: Start difference. First operand 776 states and 1021 transitions. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:21,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:21,914 INFO L93 Difference]: Finished difference Result 1482 states and 2006 transitions. [2023-12-02 20:15:21,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:15:21,915 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:15:21,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:21,916 INFO L225 Difference]: With dead ends: 1482 [2023-12-02 20:15:21,916 INFO L226 Difference]: Without dead ends: 1394 [2023-12-02 20:15:21,917 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:21,917 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 965 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 965 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:21,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [965 Valid, 1116 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-02 20:15:21,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1394 states. [2023-12-02 20:15:21,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1394 to 862. [2023-12-02 20:15:21,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3205574912891986) internal successors, (1137), 861 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1137 transitions. [2023-12-02 20:15:21,936 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1137 transitions. Word has length 128 [2023-12-02 20:15:21,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:21,936 INFO L495 AbstractCegarLoop]: Abstraction has 862 states and 1137 transitions. [2023-12-02 20:15:21,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:21,936 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1137 transitions. [2023-12-02 20:15:21,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-02 20:15:21,937 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:21,937 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:21,939 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (42)] Ended with exit code 0 [2023-12-02 20:15:22,140 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (43)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:22,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:22,338 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:22,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:22,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1731039366, now seen corresponding path program 1 times [2023-12-02 20:15:22,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:22,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [315695483] [2023-12-02 20:15:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:22,339 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 [2023-12-02 20:15:22,339 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:22,339 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:22,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (44)] Waiting until timeout for monitored process [2023-12-02 20:15:22,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:22,459 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:22,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:23,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:23,561 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [315695483] [2023-12-02 20:15:23,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [315695483] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:23,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1937140901] [2023-12-02 20:15:23,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:23,561 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:23,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:23,562 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:23,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Waiting until timeout for monitored process [2023-12-02 20:15:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:23,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:23,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:15:26,212 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-02 20:15:26,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1937140901] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-02 20:15:26,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-12-02 20:15:26,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [9, 8] total 24 [2023-12-02 20:15:26,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563845577] [2023-12-02 20:15:26,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-02 20:15:26,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-02 20:15:26,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:26,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-02 20:15:26,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:26,214 INFO L87 Difference]: Start difference. First operand 862 states and 1137 transitions. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:26,502 INFO L93 Difference]: Finished difference Result 1568 states and 2122 transitions. [2023-12-02 20:15:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-02 20:15:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-12-02 20:15:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:26,504 INFO L225 Difference]: With dead ends: 1568 [2023-12-02 20:15:26,504 INFO L226 Difference]: Without dead ends: 1480 [2023-12-02 20:15:26,504 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-12-02 20:15:26,505 INFO L413 NwaCegarLoop]: 241 mSDtfsCounter, 1111 mSDsluCounter, 830 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1111 SdHoareTripleChecker+Valid, 1071 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:26,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1111 Valid, 1071 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-02 20:15:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1480 states. [2023-12-02 20:15:26,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1480 to 948. [2023-12-02 20:15:26,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 1.3231256599788808) internal successors, (1253), 947 states have internal predecessors, (1253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:26,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1253 transitions. [2023-12-02 20:15:26,527 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1253 transitions. Word has length 128 [2023-12-02 20:15:26,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:26,527 INFO L495 AbstractCegarLoop]: Abstraction has 948 states and 1253 transitions. [2023-12-02 20:15:26,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:26,527 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1253 transitions. [2023-12-02 20:15:26,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-02 20:15:26,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:26,528 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:26,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (45)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:26,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (44)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:26,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:15:26,928 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:26,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:26,929 INFO L85 PathProgramCache]: Analyzing trace with hash -203989713, now seen corresponding path program 1 times [2023-12-02 20:15:26,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:26,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1969816814] [2023-12-02 20:15:26,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:26,929 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 [2023-12-02 20:15:26,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:26,930 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:26,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (46)] Waiting until timeout for monitored process [2023-12-02 20:15:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:27,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:27,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:27,658 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:28,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:28,067 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1969816814] [2023-12-02 20:15:28,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1969816814] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2312676] [2023-12-02 20:15:28,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:28,068 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:28,068 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:28,069 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:28,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2023-12-02 20:15:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:28,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 20:15:28,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:28,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:15:28,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:15:28,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2312676] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:28,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891649220] [2023-12-02 20:15:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:28,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:28,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:28,632 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:28,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-12-02 20:15:28,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:28,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-02 20:15:28,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:28,883 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-02 20:15:28,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891649220] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:29,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:15:29,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 4, 4, 4, 5] total 21 [2023-12-02 20:15:29,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642138722] [2023-12-02 20:15:29,163 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:29,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-02 20:15:29,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:29,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-02 20:15:29,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2023-12-02 20:15:29,165 INFO L87 Difference]: Start difference. First operand 948 states and 1253 transitions. Second operand has 21 states, 21 states have (on average 26.238095238095237) internal successors, (551), 21 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:31,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:31,111 INFO L93 Difference]: Finished difference Result 3999 states and 5330 transitions. [2023-12-02 20:15:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-12-02 20:15:31,111 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 26.238095238095237) internal successors, (551), 21 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-12-02 20:15:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:31,113 INFO L225 Difference]: With dead ends: 3999 [2023-12-02 20:15:31,113 INFO L226 Difference]: Without dead ends: 3137 [2023-12-02 20:15:31,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 748 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=505, Invalid=1657, Unknown=0, NotChecked=0, Total=2162 [2023-12-02 20:15:31,115 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 2367 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2367 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:31,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2367 Valid, 905 Invalid, 861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-02 20:15:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3137 states. [2023-12-02 20:15:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3137 to 3080. [2023-12-02 20:15:31,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3080 states, 3079 states have (on average 1.3023708996427412) internal successors, (4010), 3079 states have internal predecessors, (4010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:31,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4010 transitions. [2023-12-02 20:15:31,219 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4010 transitions. Word has length 129 [2023-12-02 20:15:31,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:31,219 INFO L495 AbstractCegarLoop]: Abstraction has 3080 states and 4010 transitions. [2023-12-02 20:15:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 26.238095238095237) internal successors, (551), 21 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4010 transitions. [2023-12-02 20:15:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2023-12-02 20:15:31,220 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:31,220 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:31,223 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (46)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:31,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:31,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-12-02 20:15:31,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:31,821 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:31,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:31,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1923501188, now seen corresponding path program 1 times [2023-12-02 20:15:31,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:31,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036157753] [2023-12-02 20:15:31,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:31,824 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 [2023-12-02 20:15:31,824 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:31,824 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:31,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (49)] Waiting until timeout for monitored process [2023-12-02 20:15:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:31,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:31,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:32,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:32,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:33,045 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:33,046 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036157753] [2023-12-02 20:15:33,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036157753] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:33,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1962574098] [2023-12-02 20:15:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:33,046 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:33,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:33,047 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:33,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2023-12-02 20:15:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:33,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:33,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:34,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:34,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1962574098] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:34,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021379565] [2023-12-02 20:15:34,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:34,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:34,562 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:34,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-12-02 20:15:34,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:34,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:15:34,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:35,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:35,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:36,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021379565] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:36,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:15:36,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 8] total 37 [2023-12-02 20:15:36,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10336082] [2023-12-02 20:15:36,108 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:36,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 20:15:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 20:15:36,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1176, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 20:15:36,110 INFO L87 Difference]: Start difference. First operand 3080 states and 4010 transitions. Second operand has 37 states, 37 states have (on average 13.972972972972974) internal successors, (517), 37 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:39,483 INFO L93 Difference]: Finished difference Result 8360 states and 10861 transitions. [2023-12-02 20:15:39,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-02 20:15:39,483 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 13.972972972972974) internal successors, (517), 37 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2023-12-02 20:15:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:39,486 INFO L225 Difference]: With dead ends: 8360 [2023-12-02 20:15:39,487 INFO L226 Difference]: Without dead ends: 5458 [2023-12-02 20:15:39,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 801 GetRequests, 739 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=759, Invalid=3273, Unknown=0, NotChecked=0, Total=4032 [2023-12-02 20:15:39,490 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 1764 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1764 SdHoareTripleChecker+Valid, 1261 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:39,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1764 Valid, 1261 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-02 20:15:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5458 states. [2023-12-02 20:15:39,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5458 to 5386. [2023-12-02 20:15:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5386 states, 5385 states have (on average 1.2822655524605386) internal successors, (6905), 5385 states have internal predecessors, (6905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:39,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5386 states to 5386 states and 6905 transitions. [2023-12-02 20:15:39,667 INFO L78 Accepts]: Start accepts. Automaton has 5386 states and 6905 transitions. Word has length 130 [2023-12-02 20:15:39,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:39,667 INFO L495 AbstractCegarLoop]: Abstraction has 5386 states and 6905 transitions. [2023-12-02 20:15:39,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 13.972972972972974) internal successors, (517), 37 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:39,668 INFO L276 IsEmpty]: Start isEmpty. Operand 5386 states and 6905 transitions. [2023-12-02 20:15:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-12-02 20:15:39,668 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:39,668 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:39,671 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (49)] Ended with exit code 0 [2023-12-02 20:15:39,876 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-12-02 20:15:40,074 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (50)] Ended with exit code 0 [2023-12-02 20:15:40,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:40,272 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:40,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:40,272 INFO L85 PathProgramCache]: Analyzing trace with hash 743655741, now seen corresponding path program 1 times [2023-12-02 20:15:40,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:40,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1181630241] [2023-12-02 20:15:40,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:40,273 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 [2023-12-02 20:15:40,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:40,273 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:40,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (52)] Waiting until timeout for monitored process [2023-12-02 20:15:40,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:40,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:40,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:41,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:41,549 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1181630241] [2023-12-02 20:15:41,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1181630241] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:41,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [695251500] [2023-12-02 20:15:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:41,549 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:41,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:41,550 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:41,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (53)] Waiting until timeout for monitored process [2023-12-02 20:15:41,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:41,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:41,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:42,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:43,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [695251500] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:43,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414909317] [2023-12-02 20:15:43,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:43,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:43,005 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:43,006 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-12-02 20:15:43,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:43,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-02 20:15:43,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:44,356 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:44,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:44,649 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:44,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414909317] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:44,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:15:44,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 20:15:44,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128438549] [2023-12-02 20:15:44,650 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:44,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 20:15:44,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:44,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 20:15:44,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 20:15:44,652 INFO L87 Difference]: Start difference. First operand 5386 states and 6905 transitions. Second operand has 37 states, 37 states have (on average 15.08108108108108) internal successors, (558), 37 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:48,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:48,763 INFO L93 Difference]: Finished difference Result 15550 states and 19962 transitions. [2023-12-02 20:15:48,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 20:15:48,763 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 15.08108108108108) internal successors, (558), 37 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2023-12-02 20:15:48,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:48,769 INFO L225 Difference]: With dead ends: 15550 [2023-12-02 20:15:48,769 INFO L226 Difference]: Without dead ends: 10396 [2023-12-02 20:15:48,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 809 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=798, Invalid=3492, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 20:15:48,773 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 1667 mSDsluCounter, 1510 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 1651 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:48,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 1651 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 20:15:48,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2023-12-02 20:15:49,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10262. [2023-12-02 20:15:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10262 states, 10261 states have (on average 1.2656661144137997) internal successors, (12987), 10261 states have internal predecessors, (12987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10262 states to 10262 states and 12987 transitions. [2023-12-02 20:15:49,262 INFO L78 Accepts]: Start accepts. Automaton has 10262 states and 12987 transitions. Word has length 131 [2023-12-02 20:15:49,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:15:49,262 INFO L495 AbstractCegarLoop]: Abstraction has 10262 states and 12987 transitions. [2023-12-02 20:15:49,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 15.08108108108108) internal successors, (558), 37 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:49,262 INFO L276 IsEmpty]: Start isEmpty. Operand 10262 states and 12987 transitions. [2023-12-02 20:15:49,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-12-02 20:15:49,263 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:15:49,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:15:49,267 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (53)] Ended with exit code 0 [2023-12-02 20:15:49,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:49,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (52)] Forceful destruction successful, exit code 0 [2023-12-02 20:15:49,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:15:49,864 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:15:49,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:15:49,865 INFO L85 PathProgramCache]: Analyzing trace with hash 80833836, now seen corresponding path program 1 times [2023-12-02 20:15:49,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:15:49,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [263042326] [2023-12-02 20:15:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:49,865 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 [2023-12-02 20:15:49,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:15:49,866 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:15:49,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (55)] Waiting until timeout for monitored process [2023-12-02 20:15:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:50,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:15:50,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:50,839 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:50,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:51,176 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:51,176 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:15:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [263042326] [2023-12-02 20:15:51,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [263042326] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:51,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [526932333] [2023-12-02 20:15:51,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:51,177 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:15:51,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:15:51,177 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:15:51,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Waiting until timeout for monitored process [2023-12-02 20:15:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:51,423 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:15:51,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:52,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:52,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:52,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:52,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [526932333] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:52,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953228664] [2023-12-02 20:15:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:15:52,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:15:52,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:15:52,811 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:15:52,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-12-02 20:15:52,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:15:52,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:15:52,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:15:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:54,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:15:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:15:54,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953228664] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:15:54,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:15:54,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 20:15:54,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146688264] [2023-12-02 20:15:54,414 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:15:54,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 20:15:54,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:15:54,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 20:15:54,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 20:15:54,417 INFO L87 Difference]: Start difference. First operand 10262 states and 12987 transitions. Second operand has 37 states, 37 states have (on average 15.513513513513514) internal successors, (574), 37 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:15:59,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:15:59,346 INFO L93 Difference]: Finished difference Result 29610 states and 37497 transitions. [2023-12-02 20:15:59,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 20:15:59,346 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 15.513513513513514) internal successors, (574), 37 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-12-02 20:15:59,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:15:59,357 INFO L225 Difference]: With dead ends: 29610 [2023-12-02 20:15:59,357 INFO L226 Difference]: Without dead ends: 19754 [2023-12-02 20:15:59,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 815 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1010 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=798, Invalid=3492, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 20:15:59,364 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 1503 mSDsluCounter, 1935 mSDsCounter, 0 mSdLazyCounter, 1614 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1503 SdHoareTripleChecker+Valid, 2072 SdHoareTripleChecker+Invalid, 1642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-02 20:15:59,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1503 Valid, 2072 Invalid, 1642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1614 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-02 20:15:59,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19754 states. [2023-12-02 20:16:00,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19754 to 19504. [2023-12-02 20:16:00,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19504 states, 19503 states have (on average 1.248730964467005) internal successors, (24354), 19503 states have internal predecessors, (24354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:00,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19504 states to 19504 states and 24354 transitions. [2023-12-02 20:16:00,135 INFO L78 Accepts]: Start accepts. Automaton has 19504 states and 24354 transitions. Word has length 132 [2023-12-02 20:16:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:16:00,135 INFO L495 AbstractCegarLoop]: Abstraction has 19504 states and 24354 transitions. [2023-12-02 20:16:00,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 15.513513513513514) internal successors, (574), 37 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 19504 states and 24354 transitions. [2023-12-02 20:16:00,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-02 20:16:00,136 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:16:00,137 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:16:00,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (55)] Ended with exit code 0 [2023-12-02 20:16:00,339 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (56)] Ended with exit code 0 [2023-12-02 20:16:00,542 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-12-02 20:16:00,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:00,737 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:16:00,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:16:00,738 INFO L85 PathProgramCache]: Analyzing trace with hash 968626349, now seen corresponding path program 1 times [2023-12-02 20:16:00,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:16:00,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [294389775] [2023-12-02 20:16:00,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:00,738 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 [2023-12-02 20:16:00,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:16:00,739 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:16:00,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (58)] Waiting until timeout for monitored process [2023-12-02 20:16:00,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:00,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:16:00,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:01,731 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:01,731 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:02,082 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:02,082 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:16:02,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [294389775] [2023-12-02 20:16:02,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [294389775] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:02,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [244897007] [2023-12-02 20:16:02,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:02,083 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:16:02,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:16:02,084 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:16:02,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Waiting until timeout for monitored process [2023-12-02 20:16:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:02,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:16:02,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:03,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:03,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:03,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [244897007] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:03,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105505600] [2023-12-02 20:16:03,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:03,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:03,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:16:03,774 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:16:03,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-12-02 20:16:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:03,913 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:16:03,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:05,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:05,237 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:05,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105505600] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:05,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:16:05,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 20:16:05,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605193376] [2023-12-02 20:16:05,628 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:16:05,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 20:16:05,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:16:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 20:16:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 20:16:05,631 INFO L87 Difference]: Start difference. First operand 19504 states and 24354 transitions. Second operand has 37 states, 37 states have (on average 16.243243243243242) internal successors, (601), 37 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:11,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:16:11,703 INFO L93 Difference]: Finished difference Result 64614 states and 80911 transitions. [2023-12-02 20:16:11,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 20:16:11,704 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 16.243243243243242) internal successors, (601), 37 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2023-12-02 20:16:11,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:16:11,732 INFO L225 Difference]: With dead ends: 64614 [2023-12-02 20:16:11,732 INFO L226 Difference]: Without dead ends: 45960 [2023-12-02 20:16:11,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 756 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=782, Invalid=3508, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 20:16:11,743 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 2516 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2516 SdHoareTripleChecker+Valid, 1841 SdHoareTripleChecker+Invalid, 1724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-02 20:16:11,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2516 Valid, 1841 Invalid, 1724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-02 20:16:11,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45960 states. [2023-12-02 20:16:13,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45960 to 36884. [2023-12-02 20:16:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36884 states, 36883 states have (on average 1.231732776617954) internal successors, (45430), 36883 states have internal predecessors, (45430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36884 states to 36884 states and 45430 transitions. [2023-12-02 20:16:13,444 INFO L78 Accepts]: Start accepts. Automaton has 36884 states and 45430 transitions. Word has length 133 [2023-12-02 20:16:13,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:16:13,444 INFO L495 AbstractCegarLoop]: Abstraction has 36884 states and 45430 transitions. [2023-12-02 20:16:13,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 16.243243243243242) internal successors, (601), 37 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:13,444 INFO L276 IsEmpty]: Start isEmpty. Operand 36884 states and 45430 transitions. [2023-12-02 20:16:13,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-02 20:16:13,445 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:16:13,446 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:16:13,448 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (59)] Ended with exit code 0 [2023-12-02 20:16:13,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (58)] Ended with exit code 0 [2023-12-02 20:16:13,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-12-02 20:16:14,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:14,047 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:16:14,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:16:14,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1880032292, now seen corresponding path program 1 times [2023-12-02 20:16:14,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:16:14,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [475195651] [2023-12-02 20:16:14,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:14,047 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 [2023-12-02 20:16:14,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:16:14,048 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:16:14,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (61)] Waiting until timeout for monitored process [2023-12-02 20:16:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:14,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:16:14,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:15,040 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:15,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:15,414 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:16:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [475195651] [2023-12-02 20:16:15,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [475195651] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:15,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [525909485] [2023-12-02 20:16:15,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:15,414 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:16:15,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:16:15,415 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:16:15,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Waiting until timeout for monitored process [2023-12-02 20:16:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:15,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:16:15,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:16,677 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:17,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:17,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [525909485] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:17,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609519907] [2023-12-02 20:16:17,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:17,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:17,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:16:17,209 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:16:17,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-12-02 20:16:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:17,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:16:17,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:18,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:19,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609519907] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:19,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:16:19,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 20:16:19,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995668698] [2023-12-02 20:16:19,052 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:16:19,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 20:16:19,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:16:19,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 20:16:19,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 20:16:19,054 INFO L87 Difference]: Start difference. First operand 36884 states and 45430 transitions. Second operand has 37 states, 37 states have (on average 16.62162162162162) internal successors, (615), 37 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:26,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:16:26,458 INFO L93 Difference]: Finished difference Result 121510 states and 149739 transitions. [2023-12-02 20:16:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-02 20:16:26,459 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 16.62162162162162) internal successors, (615), 37 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2023-12-02 20:16:26,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:16:26,513 INFO L225 Difference]: With dead ends: 121510 [2023-12-02 20:16:26,513 INFO L226 Difference]: Without dead ends: 84852 [2023-12-02 20:16:26,525 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 827 GetRequests, 762 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1037 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=782, Invalid=3508, Unknown=0, NotChecked=0, Total=4290 [2023-12-02 20:16:26,526 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 1704 mSDsluCounter, 1374 mSDsCounter, 0 mSdLazyCounter, 1405 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1704 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 1430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-12-02 20:16:26,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1704 Valid, 1494 Invalid, 1430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1405 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-12-02 20:16:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84852 states. [2023-12-02 20:16:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84852 to 69268. [2023-12-02 20:16:30,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69268 states, 69267 states have (on average 1.210071173863456) internal successors, (83818), 69267 states have internal predecessors, (83818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:30,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69268 states to 69268 states and 83818 transitions. [2023-12-02 20:16:30,132 INFO L78 Accepts]: Start accepts. Automaton has 69268 states and 83818 transitions. Word has length 134 [2023-12-02 20:16:30,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:16:30,132 INFO L495 AbstractCegarLoop]: Abstraction has 69268 states and 83818 transitions. [2023-12-02 20:16:30,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 16.62162162162162) internal successors, (615), 37 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:30,132 INFO L276 IsEmpty]: Start isEmpty. Operand 69268 states and 83818 transitions. [2023-12-02 20:16:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-12-02 20:16:30,134 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:16:30,134 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:16:30,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-12-02 20:16:30,337 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (61)] Ended with exit code 0 [2023-12-02 20:16:30,538 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (62)] Ended with exit code 0 [2023-12-02 20:16:30,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt [2023-12-02 20:16:30,735 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:16:30,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:16:30,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1217153565, now seen corresponding path program 1 times [2023-12-02 20:16:30,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:16:30,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2024711226] [2023-12-02 20:16:30,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:30,736 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 [2023-12-02 20:16:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:16:30,737 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:16:30,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (64)] Waiting until timeout for monitored process [2023-12-02 20:16:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:30,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:16:30,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:31,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:31,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:32,062 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:16:32,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2024711226] [2023-12-02 20:16:32,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2024711226] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:32,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [20374168] [2023-12-02 20:16:32,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:32,063 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:16:32,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:16:32,064 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:16:32,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (65)] Waiting until timeout for monitored process [2023-12-02 20:16:32,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:32,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-02 20:16:32,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:33,374 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:33,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [20374168] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:33,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64876492] [2023-12-02 20:16:33,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:33,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-02 20:16:33,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 [2023-12-02 20:16:33,888 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-02 20:16:33,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2023-12-02 20:16:34,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:34,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-02 20:16:34,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:35,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:35,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:35,665 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:35,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64876492] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:35,665 INFO L185 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2023-12-02 20:16:35,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8, 8, 10, 9] total 37 [2023-12-02 20:16:35,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633689464] [2023-12-02 20:16:35,666 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2023-12-02 20:16:35,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-12-02 20:16:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2023-12-02 20:16:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-12-02 20:16:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2023-12-02 20:16:35,669 INFO L87 Difference]: Start difference. First operand 69268 states and 83818 transitions. Second operand has 37 states, 37 states have (on average 16.972972972972972) internal successors, (628), 37 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-02 20:16:47,558 INFO L93 Difference]: Finished difference Result 214278 states and 258495 transitions. [2023-12-02 20:16:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-02 20:16:47,558 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 16.972972972972972) internal successors, (628), 37 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2023-12-02 20:16:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-02 20:16:47,676 INFO L225 Difference]: With dead ends: 214278 [2023-12-02 20:16:47,676 INFO L226 Difference]: Without dead ends: 151884 [2023-12-02 20:16:47,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 832 GetRequests, 769 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=754, Invalid=3406, Unknown=0, NotChecked=0, Total=4160 [2023-12-02 20:16:47,697 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 1728 mSDsluCounter, 1819 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-02 20:16:47,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 1931 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1738 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-02 20:16:47,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151884 states. [2023-12-02 20:16:54,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151884 to 127508. [2023-12-02 20:16:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127508 states, 127507 states have (on average 1.1938638662975367) internal successors, (152226), 127507 states have internal predecessors, (152226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:54,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127508 states to 127508 states and 152226 transitions. [2023-12-02 20:16:54,788 INFO L78 Accepts]: Start accepts. Automaton has 127508 states and 152226 transitions. Word has length 135 [2023-12-02 20:16:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-02 20:16:54,788 INFO L495 AbstractCegarLoop]: Abstraction has 127508 states and 152226 transitions. [2023-12-02 20:16:54,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 16.972972972972972) internal successors, (628), 37 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-02 20:16:54,789 INFO L276 IsEmpty]: Start isEmpty. Operand 127508 states and 152226 transitions. [2023-12-02 20:16:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-12-02 20:16:54,791 INFO L187 NwaCegarLoop]: Found error trace [2023-12-02 20:16:54,791 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-02 20:16:54,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2023-12-02 20:16:55,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (65)] Forceful destruction successful, exit code 0 [2023-12-02 20:16:55,194 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (64)] Ended with exit code 0 [2023-12-02 20:16:55,392 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/z3 -smt2 -in SMTLIB2_COMPLIANT=true,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 [2023-12-02 20:16:55,392 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-02 20:16:55,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-02 20:16:55,392 INFO L85 PathProgramCache]: Analyzing trace with hash 77979532, now seen corresponding path program 1 times [2023-12-02 20:16:55,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy WALRUS [2023-12-02 20:16:55,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [440342355] [2023-12-02 20:16:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:55,393 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 [2023-12-02 20:16:55,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/mathsat [2023-12-02 20:16:55,394 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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) [2023-12-02 20:16:55,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/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 (67)] Waiting until timeout for monitored process [2023-12-02 20:16:55,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:55,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-02 20:16:55,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:16:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:56,741 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-02 20:16:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:16:57,187 INFO L136 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2023-12-02 20:16:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [440342355] [2023-12-02 20:16:57,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [440342355] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-02 20:16:57,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2002191753] [2023-12-02 20:16:57,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-02 20:16:57,188 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2023-12-02 20:16:57,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 [2023-12-02 20:16:57,189 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2023-12-02 20:16:57,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_afff1957-16bc-40eb-b259-63bc9bb856fe/bin/utaipan-verify-nQ1chXbOIh/cvc4 --incremental --print-success --lang smt (68)] Waiting until timeout for monitored process [2023-12-02 20:16:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-02 20:16:57,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-02 20:16:57,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-02 20:17:54,680 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-02 20:17:54,680 INFO L327 TraceCheckSpWp]: Computing backward predicates...